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Document And Entity Information
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9 Months Ended | |
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Sep. 30, 2011
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Oct. 26, 2011
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| Document And Entity Information [Abstract] | ||
| Document Type | 10-Q | |
| Amendment Flag | false | |
| Document Period End Date | Sep. 30, 2011 | |
| Document Fiscal Year Focus | 2011 | |
| Document Fiscal Period Focus | Q3 | |
| Trading Symbol | wr | |
| Entity Registrant Name | WESTAR ENERGY INC /KS | |
| Entity Central Index Key | 0000054507 | |
| Current Fiscal Year End Date | --12-31 | |
| Entity Filer Category | Large Accelerated Filer | |
| Entity Common Stock, Shares Outstanding | 117,180,729 |
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- Definition
If the value is true, then the document as an amendment to previously-filed/accepted document. No definition available.
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- Definition
End date of current fiscal year in the format --MM-DD. No definition available.
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- Definition
This is focus fiscal period of the document report. For a first quarter 2006 quarterly report, which may also provide financial information from prior periods, the first fiscal quarter should be given as the fiscal period focus. Values: FY, Q1, Q2, Q3, Q4, H1, H2, M9, T1, T2, T3, M8, CY. No definition available.
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- Definition
This is focus fiscal year of the document report in CCYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006. No definition available.
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- Definition
The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD. No definition available.
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- Definition
The type of document being provided (such as 10-K, 10-Q, N-1A, etc). The document type is limited to the same value as the supporting SEC submission type, minus any "/A" suffix. The acceptable values are as follows: S-1, S-3, S-4, S-11, F-1, F-3, F-4, F-9, F-10, 6-K, 8-K, 10, 10-K, 10-Q, 20-F, 40-F, N-1A, 485BPOS, 497, NCSR, N-CSR, N-CSRS, N-Q, 10-KT, 10-QT, 20-FT, POS AM and Other. No definition available.
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- Definition
A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Indicate number of shares outstanding of each of registrant's classes of common stock, as of latest practicable date. Where multiple classes exist define each class by adding class of stock items such as Common Class A [Member], Common Class B [Member] onto the Instrument [Domain] of the Entity Listings, Instrument No definition available.
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- Definition
Indicate whether the registrant is one of the following: (1) Large Accelerated Filer, (2) Accelerated Filer, (3) Non-accelerated Filer, or (4) Smaller Reporting Company. Definitions of these categories are stated in Rule 12b-2 of the Exchange Act. This information should be based on the registrant's current or most recent filing containing the related disclosure. No definition available.
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- Definition
The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Trading symbol of an instrument as listed on an exchange. No definition available.
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- Details
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- Definition
Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The noncurrent portion of the reserve for accumulated deferred investment tax credits as of the balance sheet date. This is the remaining investment credit, which will reduce the cost of services collected from ratepayers by a ratable portion over the investment's regulatory life. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Noncurrent portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents. Includes cash and cash equivalents associated with the entity's continuing operations. Excludes cash and cash equivalents associated with the disposal group (and discontinued operation). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The fair value of investments held in a trust fund to pay for the costs of decontaminating and decommissioning facilities, whether such amount is presented as a separate caption or as a parenthetical disclosure on the balance sheet. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The current portion of the aggregate tax effects as of the balance sheet date of all future tax deductions arising from temporary differences between tax basis and generally accepted accounting principles basis recognition of assets, liabilities, revenues and expenses, which can only be deducted for tax purposes when permitted under enacted tax laws; after deducting the allocated valuation allowance, if any, to reduce such amount to net realizable value. Deferred tax liabilities and assets are classified as current or noncurrent based on the classification of the related asset or liability for financial reporting. A deferred tax liability or asset that is not related to an asset or liability for financial reporting, including deferred tax assets related to carryforwards, are classified according to the expected reversal date of the temporary difference. An unrecognized tax benefit that is directly related to a position taken in a tax year that results in a net operating loss carryforward is presented as a reduction of the related deferred tax asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Represents the noncurrent portion of deferred tax liabilities, which result from applying the applicable tax rate to net taxable temporary differences pertaining to each jurisdiction to which the entity is obligated to pay income tax. A noncurrent taxable temporary difference is a difference between the tax basis and the carrying amount of a noncurrent asset or liability in the financial statements prepared in accordance with generally accepted accounting principles. In a classified statement of financial position, an enterprise separates deferred tax liabilities and assets into a current amount and a noncurrent amount. Deferred tax liabilities and assets are classified as current or noncurrent based on the classification of the related asset or liability for financial reporting. A deferred tax liability or asset that is not related to an asset or liability for financial reporting, including deferred tax assets related to carryforwards, are classified according to the expected reversal date of the temporary difference. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Current liabilities attributable to energy marketing activities (trading activities). Current energy marketing (trading activities) are when entities engage in both financial and physical trading to increase profits, manage their commodity price risk and enhance system reliability. They may trade electricity, coal, natural gas and oil. These entities typically use a variety of financial instruments, including forward contracts, options and swaps. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Carrying amount as of the balance sheet date of the asset arising from energy trading activities that involves the purchase and sale of energy under forward contracts at fixed and variable prices and the buying and selling of financial energy contracts that include exchange futures and options and over the counter options and swaps, which are expected to be converted into cash or otherwise disposed of within a year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Carrying amount as of the balance sheet date of the asset arising from energy trading activities that involves the purchase and sale of energy under forward contracts at fixed and variable prices and the buying and selling of financial energy contracts that include exchange futures and options and over the counter options and swaps, which are expected to be converted into cash or otherwise disposed of after a year or beyond the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Carrying amount due within one year of the balance sheet date (or one operating cycle, if longer) from tax authorities as of the balance sheet date representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Carrying amount (lower of cost or market) as of the balance sheet date of inventories less all valuation and other allowances. Excludes noncurrent inventory balances (expected to remain on hand past one year or one operating cycle, if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Total of all Liabilities and Stockholders' Equity items (or Partners' Capital, as applicable), including the portion of equity attributable to noncontrolling interests, if any. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Total obligations incurred as part of normal operations that is expected to be repaid beyond the following twelve months or one business cycle. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Total of the portions of the carrying amounts as of the balance sheet date of long-term debt, which may include notes payable, bonds payable, debentures, mortgage loans, and commercial paper, which are scheduled to be repaid within one year or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year (current maturities) or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Aggregate carrying amount, as of the balance sheet date, of current assets not separately disclosed in the balance sheet. Current assets are expected to be realized or consumed within one year (or the normal operating cycle, if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Aggregate carrying amount, as of the balance sheet date, of noncurrent assets not separately disclosed in the balance sheet. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Aggregate carrying amount, as of the balance sheet date, of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered and of liabilities not separately disclosed in the balance sheet. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Aggregate carrying amount, as of the balance sheet date, of noncurrent obligations not separately disclosed in the balance sheet. Noncurrent liabilities are expected to be paid after one year (or the normal operating cycle, if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Sum of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are not expected to be recovered through revenue sources within one year or the normal operating cycle if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount for the individual regulatory current liability as itemized in a table of regulatory current liabilities as of the end of the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount for the individual regulatory noncurrent liability as itemized in a table of regulatory noncurrent liabilities as of the end of the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The portion of the gain that will be recorded as income or a reduction in rent expense in future periods less amounts recognized in the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Total of Stockholders' Equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity including portions attributable to both the parent and noncontrolling interests (previously referred to as minority interest), if any. The entity including portions attributable to the parent and noncontrolling interests is sometimes referred to as the economic entity. This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Carrying value as of the balance sheet date of obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The carrying value (book value) of an entity's issued and outstanding stock which is not included within permanent equity in Stockholders Equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The noncurrent liability recognized in the balance sheet associated with defined benefit pension plans, other post-retirement benefit plans and other general benefit plans. No definition available.
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- Definition
Noncurrent liabilities attributable to energy marketing activities (trading activities). Energy marketing (trading activities) are when entities engage in both financial and physical trading to increase profits, manage their commodity price risk and enhance system reliability. They may trade electricity, coal, natural gas and oil. These entities typically use a variety of financial instruments, including forward contracts, options and swaps. No definition available.
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- Definition
Total Other Assets No definition available.
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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified |
Sep. 30, 2011
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Dec. 31, 2010
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|---|---|---|
| Consolidated Balance Sheets [Abstract] | ||
| Accounts receivable, allowance for doubtful accounts | $ 5,325 | $ 5,729 |
| Cumulative preferred stock, par value | $ 100 | $ 100 |
| Cumulative preferred stock, authorized | 600,000 | 600,000 |
| Cumulative preferred stock, issued | 214,363 | 214,363 |
| Cumulative preferred stock, outstanding | 214,363 | 214,363 |
| Common stock, par value | $ 5 | $ 5 |
| Common stock, authorized | 275,000,000 | 150,000,000 |
| Common stock, issued | 117,083,763 | 112,128,068 |
| Common stock, outstanding | 117,083,763 | 112,128,068 |
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- Definition
A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Face amount or stated value of common stock per share; generally not indicative of the fair market value per share. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The maximum number of common shares permitted to be issued by an entity's charter and bylaws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Total number of shares of common stock held by shareholders. May be all or portion of the number of common shares authorized. These shares represent the ownership interest of the common shareholders. Shares outstanding equals shares issued minus shares held in treasury and other adjustments, if any. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Face amount or stated value per share of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer); generally not indicative of the fair market value per share. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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Consolidated Statements Of Income (USD $)
In Thousands, except Share data, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
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Sep. 30, 2011
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Sep. 30, 2010
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Sep. 30, 2011
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Sep. 30, 2010
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| Consolidated Statements Of Income [Abstract] | ||||
| REVENUES | $ 678,152 | $ 644,437 | $ 1,684,763 | $ 1,599,448 |
| OPERATING EXPENSES: | ||||
| Fuel and purchased power | 199,540 | 187,877 | 486,697 | 458,793 |
| Operating and maintenance | 137,823 | 126,602 | 412,429 | 369,584 |
| Depreciation and amortization | 72,202 | 67,918 | 213,551 | 201,955 |
| Selling, general and administrative | 27,499 | 50,418 | 132,233 | 144,499 |
| Total Operating Expenses | 437,064 | 432,815 | 1,244,910 | 1,174,831 |
| INCOME FROM OPERATIONS | 241,088 | 211,622 | 439,853 | 424,617 |
| OTHER INCOME (EXPENSE): | ||||
| Investment earnings | 2,914 | 3,248 | 6,255 | 4,350 |
| Other income | 3,404 | 1,897 | 8,210 | 3,792 |
| Other expense | (5,470) | (5,146) | (13,951) | (12,043) |
| Total Other Income (Expense) | 848 | (1) | 514 | (3,901) |
| Interest expense | 43,844 | 43,956 | 130,681 | 131,862 |
| INCOME BEFORE INCOME TAXES | 198,092 | 167,665 | 309,686 | 288,854 |
| Income tax expense | 61,700 | 51,802 | 94,812 | 86,780 |
| NET INCOME | 136,392 | 115,863 | 214,874 | 202,074 |
| Less: Net income attributable to noncontrolling interests | 1,442 | 1,119 | 4,212 | 3,338 |
| NET INCOME ATTRIBUTABLE TO WESTAR ENERGY | 134,950 | 114,744 | 210,662 | 198,736 |
| Preferred dividends | 242 | 242 | 727 | 727 |
| NET INCOME ATTRIBUTABLE TO COMMON STOCK | $ 134,708 | $ 114,502 | $ 209,935 | $ 198,009 |
| BASIC AND DILUTED EARNINGS PER AVERAGE COMMON SHARE OUTSTANDING ATTRIBUTABLE TO WESTAR ENERGY (See Note 2): | ||||
| Basic earnings per common share | $ 1.15 | $ 1.02 | $ 1.82 | $ 1.77 |
| Diluted earnings per common share | $ 1.14 | $ 1.01 | $ 1.79 | $ 1.76 |
| Average equivalent common shares outstanding | 116,806,596 | 111,706,541 | 115,208,965 | 111,387,165 |
| DIVIDENDS DECLARED PER COMMON SHARE | $ 0.32 | $ 0.31 | $ 0.96 | $ 0.93 |
| X | ||||||||||
|
- Definition
Aggregate dividends declared during the period for each share of common stock outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Total costs of sales and operating expenses for the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Equity impact of aggregate cash, stock, and paid-in-kind dividends declared for preferred shareholders during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The cost of borrowed funds accounted for as interest that was charged against earnings during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The aggregate amount of income from investments (for example, dividends) not considered a component of the entity's core operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The portion of net Income or Loss attributable to the noncontrolling interest (if any) deducted in order to derive the portion attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The net result for the period of deducting operating expenses from operating revenues. No definition available.
|
| X | ||||||||||
|
- Definition
The aggregate amount of other expense amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating expense recognized during the period. Such amounts may include: (a) unusual costs, (b) loss on foreign exchange transactions, (c) losses on securities (net of profits), and (d) miscellaneous other expense items. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The aggregate amount of other income amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) profits on securities (net of losses), and (d) miscellaneous other income items. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Discloses the amount of operating expense for the period for routine plant maintenance, repairs and operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Fuel and purchased power expense incurred that are directly related to goods produced and sold. No definition available.
|
|
Consolidated Statements Of Cash Flows (USD $)
In Thousands, unless otherwise specified |
9 Months Ended | |
|---|---|---|
|
Sep. 30, 2011
|
Sep. 30, 2010
|
|
| CASH FLOWS FROM (USED IN) OPERATING ACTIVITIES: | ||
| Net income | $ 214,874 | $ 202,074 |
| Adjustments to reconcile net income to net cash provided by operating activities: | ||
| Depreciation and amortization | 213,551 | 201,955 |
| Amortization of nuclear fuel | 13,411 | 19,657 |
| Amortization of deferred regulatory gain from sale-leaseback | (4,121) | (4,121) |
| Amortization of corporate-owned life insurance | 19,137 | 15,286 |
| Non-cash compensation | 6,834 | 8,280 |
| Net changes in energy marketing assets and liabilities | 956 | (947) |
| Accrued liability to certain former officers | 1,180 | 1,959 |
| Net deferred income taxes and credits | 100,130 | 104,133 |
| Stock-based compensation excess tax benefits | (1,186) | (526) |
| Allowance for equity funds used during construction | (4,448) | (1,926) |
| Gain on sale of non-utility investment | (7,246) | |
| Gain on settlement of contractual obligations with former officers | (22,039) | |
| Changes in working capital items: | ||
| Accounts receivable | (27,269) | (44,207) |
| Inventories and supplies | (1,837) | (7,298) |
| Prepaid expenses and other | (36,459) | 23,843 |
| Accounts payable | (14,077) | 12,965 |
| Accrued taxes | 38,291 | 70,263 |
| Other current liabilities | (105,657) | (84,095) |
| Changes in other assets | (15,291) | 25,984 |
| Changes in other liabilities | (30,957) | (42,912) |
| Cash Flows from Operating Activities | 337,777 | 500,367 |
| CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES: | ||
| Additions to property, plant and equipment | (512,675) | (369,746) |
| Purchase of securities within trusts | (41,118) | (189,784) |
| Sale of securities within trusts | 39,789 | 189,343 |
| Investment in corporate-owned life insurance | (19,214) | (18,884) |
| Proceeds from investment in corporate-owned life insurance | 869 | 1,918 |
| Proceeds from federal grant | 7,367 | |
| Investment in affiliated company | (1,479) | |
| Proceeds from sale of non-utility investment | 7,246 | |
| Other investing activities | 470 | (1,760) |
| Cash Flows used in Investing Activities | (518,745) | (388,913) |
| CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES: | ||
| Short-term debt, net | 159,770 | (79,720) |
| Retirements of long-term debt | (371) | (1,353) |
| Repayment of capital leases | (1,645) | (1,640) |
| Borrowings against cash surrender value of corporate-owned life insurance | 65,853 | 72,286 |
| Repayment of borrowings against cash surrender value of corporate-owned life insurance | (3,108) | (3,219) |
| Stock-based compensation excess tax benefits | 1,186 | 526 |
| Issuance of common stock | 96,508 | 28,299 |
| Distributions to shareholders of noncontrolling interests | (1,916) | (2,094) |
| Cash dividends paid | (102,625) | (96,391) |
| Cash Flows from (used in) Financing Activities | 184,633 | (110,842) |
| NET INCREASE IN CASH AND CASH EQUIVALENTS | 3,665 | 612 |
| CASH AND CASH EQUIVALENTS: | ||
| Beginning of period | 928 | 3,860 |
| End of period | 4,593 | 4,472 |
|
Variable Interest Entity, Primary Beneficiary [Member]
|
||
| CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES: | ||
| Retirements of long-term debt | $ (29,019) | $ (27,536) |
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents. Includes cash and cash equivalents associated with the entity's continuing operations. Excludes cash and cash equivalents associated with the disposal group (and discontinued operation). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The increase (decrease) during the reporting period in cash and cash equivalents. While for technical reasons this element has no balance attribute, the default assumption is a debit balance consistent with its label. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The net amount of deferred income taxes and income tax credits less the tax benefit from exercise of stock options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Reductions in the entity's income taxes that arise when compensation cost (from non-qualified share-based compensation) recognized on the entity's tax return exceeds compensation cost from equity-based compensation recognized in financial statements. This element represents the cash inflow reported in the enterprise's financing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Reductions in the entity's income taxes that arise when compensation cost (from non-qualified equity-based compensation) recognized on the entity's tax return exceeds compensation cost from equity-based compensation recognized in financial statements. This element reduces net cash provided by operating activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The net realized gain (loss) on investments sold during the period, not including gains (losses) on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, which, for cash flow reporting, is a component of proceeds from investing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The increase (decrease) during the reporting period of all taxes owed but not paid, including income, property and other taxes. No definition available.
|
| X | ||||||||||
|
- Definition
The increase (decrease) during the reporting period in the aggregate value of all inventory held by the reporting entity, associated with underlying transactions that are classified as operating activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The increase (decrease) during the reporting period in other current operating liabilities not separately disclosed in the statement of cash flows. No definition available.
|
| X | ||||||||||
|
- Definition
The increase (decrease) during the reporting period in other assets used in operating activities not separately disclosed in the statement of cash flows. May include changes in other current assets, other noncurrent assets, or a combination of other current and noncurrent assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The increase (decrease) during the reporting period in other liabilities used in operating activities not separately disclosed in the statement of cash flows. May include changes in other current liabilities, other noncurrent liabilities, or a combination of other current and noncurrent liabilities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The increase (decrease) during the reporting period in the value of prepaid expenses and other assets not separately disclosed in the statement of cash flows, for example, deferred expenses, intangible assets,or income taxes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The change in cash surrender or contract value during the period which adjusted the amount of premiums paid in determining the expense or income recognized under the contract for the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The net cash from (used in) the entity's financing activities specifically EXCLUDING the cash flows derived by the entity from its discontinued operations, if any. This element is only to be used when the entity reports its cash flows attributable to discontinued operations separately from the cash flow provided by or used in financing activities. Such reporting would necessitate the entity to use the Net Cash provided by or used in Discontinued Operations, Total element provided in the taxonomy. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The net cash from (used in) the entity's investing activities specifically EXCLUDING the cash flows derived by the entity from its discontinued operations, if any. This element is only to be used when the entity reports its cash flows attributable to discontinued operations separately from the cash flow provided by or used in investing activities. Such reporting would necessitate the entity to use the Net Cash provided by or used in Discontinued Operations, Total element provided in the taxonomy. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The net cash from (used in) the entity's continuing operations. This element specifically EXCLUDES the cash flows derived by the entity from its discontinued operations, if any. This element is only to be used when the entity reports its cash flows attributable to discontinued operations separately from the cash flow provided by or used in operating activities. While for technical reasons this element has no balance attribute, the default assumption is a debit balance consistent with its label. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The net cash outflow or inflow from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The cash outflow from the entity's earnings to the shareholders. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The cash outflow associated with the acquisition of a controlling interest in another entity or an entity that is related to it but not strictly controlled (for example, an unconsolidated subsidiary, affiliate, joint venture or equity method investment). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The cash outflow from purchases of trading, available-for-sale securities and held-to-maturity securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The cash inflow from the additional capital contribution to the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The cash inflow for proceeds from life insurance policies for which the entity is the beneficiary. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The net cash inflow or outflow for borrowing having initial term of repayment within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (held-to-maturity or available-for-sale) during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The cash inflow associated with the sale of other investments not otherwise defined in the taxonomy. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The component of the allowance for funds used during construction during the period based on an assumed rate of return on equity funds used in financing the construction of regulated assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The portion of the deferred gain that was recognized in the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of open agreements to purchase or sell energy at some future point, held at each balance sheet date, that was included in earnings for the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The accrued liability to former officers for non-cash compensation not yet paid to them. No definition available.
|
| X | ||||||||||
|
- Definition
The amortization of various items related to corporate-owned life insurance policies. No definition available.
|
| X | ||||||||||
|
- Definition
The current period expense charged against earnings for the amortization of capitalized nuclear fuel used to generate electricity. No definition available.
|
| X | ||||||||||
|
- Definition
Payment of dividends or other distributions to noncontrolling interest holders. No definition available.
|
| X | ||||||||||
|
- Definition
The gain recorded in earnings for the settlement of contractual obligations in an amount less than that accrued. No definition available.
|
| X | ||||||||||
|
- Definition
The cash inflow from borrowings against the cash surrender value of corporate-owned life insurance polices. No definition available.
|
| X | ||||||||||
|
- Definition
The cash inflow associated with non-repayable money awarded to an entity to carry out a specific project. No definition available.
|
| X | ||||||||||
|
- Definition
The cash outflow associated with the repayment of borrowings against the cash surrender value of corporate-owned life insurance polices. No definition available.
|
|
Consolidated Statements Of Changes In Equity (USD $)
In Thousands, except Share data |
Cumulative Preferred Stock [Member]
|
Common Stock [Member]
|
Paid-In Capital [Member]
|
Retained Earnings [Member]
|
Noncontrolling Interests [Member]
|
Total
|
|---|---|---|---|---|---|---|
| Beginning Balance at Dec. 31, 2009 | $ 21,436 | $ 545,360 | $ 1,339,790 | $ 360,199 | $ 2,266,785 | |
| Beginning Balance (Shares) at Dec. 31, 2009 | 214,363 | 109,072,000 | ||||
| Net income | 198,736 | 3,338 | 202,074 | |||
| Issuance of common stock | 8,810 | 28,698 | 37,508 | |||
| Issuance of common stock (shares) | 1,761,975 | |||||
| Preferred dividends | (727) | (727) | ||||
| Dividends on common stock | (104,316) | (104,316) | ||||
| Transfer to/from temporary equity | (16) | (16) | ||||
| Amortization of restricted stock | 7,667 | 7,667 | ||||
| Stock compensation and tax benefit | (2,842) | (2,842) | ||||
| Consolidation of noncontrolling interests | 3,435 | 3,435 | ||||
| Distributions to shareholders of noncontrolling interests | (2,091) | (2,091) | ||||
| Ending Balance at Sep. 30, 2010 | 21,436 | 554,170 | 1,373,297 | 453,892 | 4,682 | 2,407,477 |
| Ending Balance (Shares) at Sep. 30, 2010 | 214,363 | 110,833,975 | ||||
| Beginning Balance at Dec. 31, 2010 | 21,436 | 560,640 | 1,398,580 | 423,647 | 6,070 | 2,410,373 |
| Beginning Balance (Shares) at Dec. 31, 2010 | 214,363 | 112,128,068 | ||||
| Net income | 210,662 | 4,212 | 214,874 | |||
| Issuance of common stock | 24,779 | 85,532 | 110,311 | |||
| Issuance of common stock (shares) | 4,955,695 | |||||
| Preferred dividends | (727) | (727) | ||||
| Dividends on common stock | (111,216) | (111,216) | ||||
| Transfer to/from temporary equity | 3,465 | 3,465 | ||||
| Amortization of restricted stock | 6,176 | 6,176 | ||||
| Stock compensation and tax benefit | (13,672) | (13,672) | ||||
| Distributions to shareholders of noncontrolling interests | (1,916) | (1,916) | ||||
| Ending Balance at Sep. 30, 2011 | $ 21,436 | $ 585,419 | $ 1,480,081 | $ 522,366 | $ 8,366 | $ 2,617,668 |
| Ending Balance (Shares) at Sep. 30, 2011 | 214,363 | 117,083,763 |
| X | ||||||||||
|
- Definition
This element represents the amount of recognized equity-based compensation related to restricted stock units during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). No definition available.
|
| X | ||||||||||
|
- Definition
Equity impact of aggregate cash, stock, and paid-in-kind dividends declared for common shareholders during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Equity impact of aggregate cash, stock, and paid-in-kind dividends declared for preferred shareholders during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Decrease in noncontrolling interest balance from payment of dividends or other distributions by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Number of shares issued and outstanding as of the balance sheet date. No definition available.
|
| X | ||||||||||
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- Definition
Total of Stockholders' Equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity including portions attributable to both the parent and noncontrolling interests (previously referred to as minority interest), if any. The entity including portions attributable to the parent and noncontrolling interests is sometimes referred to as the economic entity. This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Number of new stock issued during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Change in the value of each type or class of stock classified as temporary equity during the period. The redemption requirement does not constitute an unconditional obligation that will be settled in a variable number of shares constituting a monetary value predominantly indexed to (a) a fixed monetary amount known at inception, (b) an amount inversely correlated with the residual value of the entity, or (c) an amount determined by reference to something other than the fair value of issuer's stock. Does not include mandatorily redeemable stock. The exception is if redemption is required upon liquidation or termination of the reporting entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The increase (decrease) in noncontrolling interests equity due to the consolidation or deconsolidation of noncontrolling interests. No definition available.
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- Definition
This element represents (i) the amount of share-based compensation recognized during the period, that is, the amount recognized as expense in the income statement, (ii) treasury stock reissued upon exercise of stock options and (iii) tax effect on stock compensation. No definition available.
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Description Of Business
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9 Months Ended |
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Sep. 30, 2011
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| Description Of Business [Abstract] | |
| Description Of Business | 1. DESCRIPTION OF BUSINESS We are the largest electric utility in Kansas. Unless the context otherwise indicates, all references in this Quarterly Report on Form 10-Q to "the company," "we," "us," "our" and similar words are to Westar Energy, Inc. and its consolidated subsidiaries. The term "Westar Energy" refers to Westar Energy, Inc., a Kansas corporation incorporated in 1924, alone and not together with its consolidated subsidiaries. We provide electric generation, transmission and distribution services to approximately 687,000 customers in Kansas. Westar Energy provides these services in central and northeastern Kansas, including the cities of Topeka, Lawrence, Manhattan, Salina and Hutchinson. Kansas Gas and Electric Company (KGE), Westar Energy's wholly owned subsidiary, provides these services in south-central and southeastern Kansas, including the city of Wichita. Both Westar Energy and KGE conduct business using the name Westar Energy. Our corporate headquarters is located at 818 South Kansas Avenue, Topeka, Kansas 66612. |
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- Definition
The entire disclosure for the nature of an entity's business, the major products or services it sells or provides and its principal markets, including the locations of those markets. If the entity operates in more than one business, the disclosure also indicates the relative importance of its operations in each business and the basis for the determination (for example, assets, revenues, or earnings). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Summary Of Significant Accounting Policies
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Sep. 30, 2011
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| Summary Of Significant Accounting Policies [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary Of Significant Accounting Policies | 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Principles of Consolidation We prepare our unaudited condensed consolidated financial statements in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, certain information and footnote disclosures normally included in financial statements presented in accordance with generally accepted accounting principles (GAAP) have been condensed or omitted. Our condensed consolidated financial statements include all operating divisions, majority owned subsidiaries and variable interest entities (VIEs) of which we maintain a controlling interest or are the primary beneficiary reported as a single operating segment. Intercompany accounts and transactions have been eliminated in consolidation. In our opinion, all adjustments, consisting only of normal recurring adjustments considered necessary for a fair presentation of the consolidated financial statements, have been included. The accompanying condensed consolidated financial statements and notes should be read in conjunction with the consolidated financial statements and notes included in our 2010 Form 10-K. Use of Management's Estimates When we prepare our condensed consolidated financial statements, we are required to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities at the date of our condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. We evaluate our estimates on an on-going basis, including those related to valuation of commodity contracts, depreciation, unbilled revenue, valuation of investments, valuation of our energy marketing portfolio, forecasted fuel costs included in our retail energy cost adjustment billed to customers, income taxes, pension and post-retirement benefits, our asset retirement obligations including the decommissioning of Wolf Creek, environmental issues, VIEs, contingencies and litigation. Actual results may differ from those estimates under different assumptions or conditions. The results of operations for the three and nine months ended September 30, 2011, are not necessarily indicative of the results to be expected for the full year.
Allowance for Funds Used During Construction Allowance for funds used during construction (AFUDC) represents the allowed cost of capital used to finance utility construction activity. We compute AFUDC by applying a composite rate to qualified construction work in progress. We credit other income (for equity funds) and interest expense (for borrowed funds) for the amount of AFUDC capitalized as construction cost on the accompanying consolidated statements of income as follows:
Earnings Per Share We have participating securities in the form of unvested restricted share units (RSUs) with nonforfeitable rights to dividend equivalents that receive dividends as declared on an equal basis with common shares. As a result, we apply the two-class method of computing basic and diluted earnings per share (EPS). Under the two-class method, we reduce net income attributable to common stock by the amount of dividends declared in the current period. We allocate the remaining earnings to common stock and RSUs to the extent that each security may share in earnings as if all of the earnings for the period had been distributed. We determine the total earnings allocated to each security by adding together the amount allocated for dividends and the amount allocated for a participation feature. To compute basic EPS, we divide the earnings allocated to common stock by the weighted average equivalent common shares outstanding. Diluted EPS includes the effect of potential issuances of common shares resulting from our forward sale agreements, RSUs with forfeitable rights to dividend equivalents and stock options. We compute the dilutive effect of potential issuances of common shares using the treasury stock method.
The following table reconciles our basic and diluted EPS from net income.
Supplemental Cash Flow Information
Investment Earnings - Sale of Non-utility Investment In the third quarter of 2011, we recorded a $7.2 million gain on the sale of a fully impaired non-utility investment. |
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The entire disclosure for all significant accounting policies of the reporting entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management
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Sep. 30, 2011
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| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management | 3. FINANCIAL AND DERIVATIVE INSTRUMENTS, TRADING SECURITIES, ENERGY MARKETING AND RISK MANAGEMENT Values of Financial and Derivative Instruments GAAP establishes a hierarchal framework for disclosing the transparency of the inputs utilized in measuring assets and liabilities at fair value. Our assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the classification of assets and liabilities within the fair value hierarchy levels. The three levels of the hierarchy and examples are as follows:
We record cash and cash equivalents, short-term borrowings and variable rate debt on our consolidated balance sheets at cost, which approximates fair value. We measure the fair value of fixed rate debt based on quoted market prices for the same or similar issues or on the current rates offered for instruments of the same remaining maturities and redemption provisions. The recorded amount of accounts receivable and other current financial instruments approximates fair value. All of our level 2 investments, whether in the nuclear decommissioning trust (NDT) or our trading securities portfolio, are held in investment funds that are measured using daily net asset values as reported by the fund managers. In addition, we maintain certain level 3 investments in private equity and real estate securities that require significant unobservable market information to measure the fair value of the investments. The fair value of private equity investments is measured by utilizing both market- and income-based models, public company comparables, at cost or at the value derived from subsequent financings. Adjustments are made when actual performance differs from expected performance; when market, economic or company-specific conditions change; and when other news or events have a material impact on the security. To measure the fair value of real estate securities we use a combination of market- and income-based models utilizing market discount rates, projected cash flows and the estimated value into perpetuity. Energy marketing contracts can be exchange-traded or traded over-the-counter (OTC). Fair value measurements of exchange-traded contracts typically utilize quoted prices in active markets. OTC contracts are valued using market transactions and other market evidence whenever possible, including market-based inputs to models, model calibration to market clearing transactions or alternative pricing sources with reasonable levels of price transparency. Valuation models require a variety of inputs, including contractual terms, market prices, yield curves, credit curves, nonperformance risk, measures of volatility and correlations of such inputs. Certain OTC contracts trade in less liquid markets with limited pricing information and the determination of fair value for these derivatives is inherently more subjective. In these situations, estimates by management are a significant input. See "—Recurring Fair Value Measurements" and "—Derivative Instruments" below for additional information.
We measure fair value based on information available as of the measurement date. The following table provides the carrying values and measured fair values of our financial instruments as of September 30, 2011, and December 31, 2010.
Recurring Fair Value Measurements The following table provides the amounts and their corresponding level of hierarchy for our assets and liabilities that are measured at fair value.
We do not offset the fair value of energy marketing contracts executed with the same counterparty. As of September 30, 2011, we had recorded no right to reclaim cash collateral and $0.4 million for our obligation to return cash collateral. As of December 31, 2010, we had no right to reclaim cash collateral and had recorded $0.7 million for our obligation to return cash collateral.
The following table provides reconciliations of assets and liabilities measured at fair value using significant level 3 inputs for the three and nine months ended September 30, 2011.
The following table provides reconciliations of assets and liabilities measured at fair value using significant level 3 inputs for the three and nine months ended September 30, 2010.
Portions of the gains and losses contributing to changes in net assets in the above tables are unrealized. The following tables summarize the unrealized gains and losses we recorded on our consolidated financial statements during the three and nine months ended September 30, 2011 and 2010, attributed to level 3 assets and liabilities.
Some of our investments in the NDT and all of our trading securities do not have readily determinable fair values and are either with investment companies or companies that follow accounting guidance consistent with investment companies. In certain situations these investments may have redemption restrictions. The following table provides additional information on these investments.
Derivative Instruments Cash Flow Hedges We have entered into treasury yield hedge transactions for a total notional amount of $125.0 million in an attempt to manage our interest rate risk associated with a future anticipated issuance of fixed rate debt, which is probable to occur within 18 months of the initial treasury yield hedge transaction date of July 21, 2010. Such transactions are designated and qualify as cash flow hedges and are measured at fair value by estimating the net present value of a series of payments using market-based models with observable inputs such as the spread between the 30-year U.S. Treasury bill yield and the contracted, fixed yield. As a result of regulatory accounting treatment, we report the effective portion of the gains or losses on these derivative instruments as a regulatory liability or regulatory asset and will amortize such amounts to interest expense over the life of the related debt. We record hedge ineffectiveness gains in other income and hedge ineffectiveness losses in other expense on our consolidated statements of income. As of September 30, 2011, we had recorded $31.3 million in other current liabilities on our consolidated balance sheet to reflect the fair value of the treasury yield hedge transactions and recorded this same amount in long-term regulatory assets to reflect the effective portion of the losses on these transactions. As of December 31, 2010, we had recorded $7.7 million in other assets to reflect the fair value of these transactions and recorded this same amount in long-term regulatory liabilities to reflect the effective portion of the gains on these transactions. Commodity Contracts We engage in both financial and physical trading with the goal of managing our commodity price risk, enhancing system reliability and increasing profits. We trade electricity and other energy-related products using a variety of financial instruments, which may include futures contracts, options, swaps and physical commodity contracts.
We classify these commodity derivative instruments as energy marketing contracts on our consolidated balance sheets. We report energy marketing contracts representing unrealized gain positions as assets; energy marketing contracts representing unrealized loss positions are reported as liabilities. With the exception of certain fuel supply and electricity contracts, which we record as regulatory assets or regulatory liabilities, we include the change in the fair value of energy marketing contracts in revenues on our consolidated statements of income. The following table presents the fair value of commodity derivative instruments reflected on our consolidated balance sheets. Commodity Derivatives Not Designated as Hedging Instruments as of September 30, 2011
Commodity Derivatives Not Designated as Hedging Instruments as of December 31, 2010
The following table presents how changes in the fair value of commodity derivative instruments affected our consolidated financial statements for the three and nine months ended September 30, 2011 and 2010.
As of September 30, 2011, and December 31, 2010, we had under contract the following commodity derivatives.
Net open positions exist, or are established, due to the origination of new transactions and our assessment of, and response to, changing market conditions. To the extent we have net open positions, we are exposed to the risk that changing market prices could have a material adverse impact on our consolidated financial results. Energy Marketing Activities Within our energy trading portfolio, we may establish certain positions intended to economically hedge a portion of physical sale or purchase contracts and we may enter into certain positions attempting to take advantage of market trends and conditions. We use the term economic hedge to mean a strategy intended to manage risks of volatility in prices or rate movements on selected assets, liabilities or anticipated transactions by creating a relationship in which gains or losses on derivative instruments are expected to offset the losses or gains on the assets, liabilities or anticipated transactions exposed to such market risks. Price Risk We use various types of fuel, including coal, natural gas, uranium, diesel and oil, to operate our plants and also purchase power to meet customer demand. Our prices and consolidated financial results are exposed to market risks from commodity price changes for electricity and other energy-related products as well as interest rates. Volatility in these markets impacts our costs of purchased power, costs of fuel for our generating plants and our participation in energy markets. We strive to manage our customers' and our exposure to these market risks through regulatory, operating and financing activities and, when we deem appropriate, we economically hedge a portion of these risks through the use of derivative financial instruments for non-trading purposes. Interest Rate Risk We have entered into fixed and variable rate debt obligations. We manage our interest rate risk related to these debt obligations by limiting our exposure to variable interest rate debt, diversifying maturity dates and entering into treasury yield hedge transactions. We may also use other financial derivative instruments such as interest rate swaps. Credit Risk In addition to commodity price risk, we are exposed to credit risks associated with the financial condition of counterparties, product location (basis) pricing differentials, physical liquidity constraints and other risks. Declines in the creditworthiness of our counterparties could have a material adverse impact on our overall exposure to credit risk. We maintain credit policies with regard to our counterparties intended to reduce our overall credit risk exposure to a level we deem acceptable and include the right to offset derivative assets and liabilities by counterparty. We have derivative instruments with commodity exchanges and other counterparties that do not contain objective credit-risk-related contingent features. However, certain of our derivative instruments contain collateral provisions subject to credit agency ratings of our senior unsecured debt. If our senior unsecured debt ratings were to decrease or fall below investment grade, the counterparties to the derivative instruments, pursuant to the provisions, could require collateralization on derivative instruments. The aggregate fair value of all derivative instruments with objective credit-risk-related contingent features that were in a liability position as of September 30, 2011, and December 31, 2010, was $0.6 million and $1.6 million, respectively, for which we had posted no collateral as of September 30, 2011 and December 31, 2010. If all credit-risk-related contingent features underlying these agreements had been triggered as of September 30, 2011, and December 31, 2010, we would have been required to provide to our counterparties $0.5 million and $1.6 million, respectively, of additional collateral after taking into consideration the offsetting impact of derivative assets and net accounts receivable. |
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| Financial Investments | 4. FINANCIAL INVESTMENTS We report some of our investments in equity and debt securities at fair value and use the specific identification method to determine their realized gains and losses. We classify these investments as either trading securities or available-for-sale securities as described below.
Trading Securities We hold equity and debt investments in a trust used to fund retirement benefits that we classify as trading securities. We include unrealized gains or losses on these securities in investment earnings on our consolidated statements of income. During the three and nine months ended September 30, 2011, we recorded unrealized losses on these securities of $4.7 million and $2.6 million, respectively. We recorded unrealized gains on these securities of $3.2 million and $2.2 million, respectively, during the three and nine months ended September 30, 2010. Available-for-Sale Securities We hold investments in equity, debt and real estate securities in a trust for the purpose of funding the decommissioning of Wolf Creek. We have classified these investments as available-for-sale and have recorded all such investments at their fair market value as of September 30, 2011, and December 31, 2010. At September 30, 2011, investments in the NDT fund were allocated 40% to domestic equity, 18% to international equity, 19% to core bonds, 7% to high-yield bonds, 4% to emerging market bonds, 6% to combined debt/equity funds, 6% to real estate securities and less than 1% to cash and cash equivalents. The core bond fund has a requirement that at least 80% of funds are invested in investment grade U.S. corporate and government fixed income securities, including mortgage-backed securities. As of September 30, 2011, the fair value of available-for-sale debt securities in the core, high-yield and emerging market bond funds was $36.0 million. As of September 30, 2011, we had not invested in debt securities outside of investment funds. Using the specific identification method to determine cost, we realized gains on our available-for-sale securities of $0.1 million and $1.3 million, respectively, during the three and nine months ended September 30, 2011. During the three and nine months ended September 30, 2010, we realized losses of $0.3 million and gains of $13.2 million, respectively, on these securities. We record net realized and unrealized gains and losses in regulatory liabilities on our consolidated balance sheets. This reporting is consistent with the method we use to account for the decommissioning costs we recover in our prices. Gains or losses on assets in the trust fund are recorded as increases or decreases to regulatory liabilities and could result in lower or higher funding requirements for decommissioning costs, which we believe would be reflected in the prices paid by our customers. The following table presents the costs and fair values of investments in the NDT fund as of September 30, 2011, and December 31, 2010.
The following table presents the fair value and gross unrealized losses of the available-for-sale securities held in the NDT fund aggregated by investment category and the length of time that individual securities have been in a continuous unrealized loss position as of September 30, 2011, and December 31, 2010.
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Rate Matters And Regulation
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| Rate Matters And Regulation | 5. RATE MATTERS AND REGULATION KCC Proceedings On August 25, 2011, we filed an application with the Kansas Corporation Commission (KCC) proposing a $90.8 million increase in our annual retail prices. The primary drivers for the proposed increase were higher costs related to tree trimming, regulatory compliance, operating Wolf Creek and employee benefits. We expect the KCC to issue an order on our request in April 2012. On February 23, 2011, Kansas City Power & Light Company (KCPL) filed an application requesting that the KCC predetermine the ratemaking principles for and determine the appropriateness of approximately $1.2 billion of environmental upgrades proposed for La Cygne Generating Station (La Cygne) to comply with environmental regulations. We have a 50% interest in La Cygne and intervened in the proceeding. On August 19, 2011, the KCC issued an order ruling that the decision to make the upgrades is prudent and the $1.2 billion project cost estimate is reasonable. The KCC denied our request to collect our approximately $600.0 million share of the costs of the environmental upgrades through our environmental cost recovery rider (ECRR). However, we requested in the application to increase retail prices noted above that we be allowed to file an abbreviated rate case within 12 months of the KCC's order in that proceeding to begin collecting costs associated with our investment. On May 27, 2011, the KCC issued an order allowing us to adjust our prices to include costs associated with environmental investments made in 2010. The new prices were effective June 1, 2011, and are expected to increase our annual retail revenues by approximately $10.4 million. On April 11, 2011, the KCC issued an order allowing us to adjust our prices, subject to final KCC review, to include updated transmission costs as reflected in our transmission formula rate discussed below. The new prices were effective April 14, 2011, and are expected to increase our annual retail revenues by approximately $17.4 million. The timing of the KCC's final order on our request is uncertain.
FERC Proceedings Our transmission formula rate that includes projected 2011 transmission capital expenditures and operating costs became effective January 1, 2011, and is expected to increase our annual transmission revenues by approximately $15.9 million. This updated rate provided the basis for our request with the KCC to adjust our retail prices to include updated transmission costs as noted above. |
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Short-Term Debt
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| Short-Term Debt | 6. SHORT-TERM DEBT On September 29, 2011, Westar Energy refinanced its existing $730.0 million revolving credit facility with a new facility in the same amount. The commitments under the new facility terminate on September 29, 2016. As long as there is no default under the facility, Westar Energy may extend the facility up to an additional two years and may increase the aggregate amount of borrowings under the facility to $1.0 billion, both subject to lender participation. As of September 30, 2011, $391.9 million had been borrowed and an additional $12.8 million of letters of credit had been issued under this revolving credit facility. As of December 31, 2010, $226.7 million had been borrowed and an additional $21.5 million of letters of credit had been issued under Westar Energy's previous $730.0 million revolving credit facility. On February 18, 2011, Westar Energy entered into a revolving credit facility with a syndicate of banks for $270.0 million. The commitments under this facility terminate on February 18, 2015. As long as there is no default under the facility, Westar Energy may extend the facility up to an additional two years and may increase the aggregate amount of borrowings under the facility to $400.0 million, both subject to lender participation. As of September 30, 2011, Westar Energy had neither borrowed monies nor issued letters of credit under this revolving credit facility. |
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Taxes
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| Taxes | 7. TAXES We recorded income tax expense of $61.7 million with an effective income tax rate of 31% for the three months ended September 30, 2011, and income tax expense of $51.8 million with an effective income tax rate of 31% for the same period of 2010; and income tax expense of $94.8 million with an effective income tax rate of 31% for the nine months ended September 30, 2011, and income tax expense of $86.8 million with an effective income tax rate of 30% for the same period of 2010. In 2010, we established a valuation allowance of $51.9 million against the unused state investment tax credits of $116.2 million. We reversed this valuation allowance during the second quarter of 2011 due to a state law change which extended the state investment tax credit carryforward period from 10 to 16 years. At September 30, 2011, and December 31, 2010, our liability for unrecognized income tax benefits was $4.3 million and $1.9 million, respectively. The net increase in the liability for unrecognized income tax benefits was largely attributable to tax positions taken with respect to the capitalization of plant related expenditures. We do not expect any significant changes in this liability in the next 12 months. As of September 30, 2011, and December 31, 2010, we had $0.4 million accrued for interest on our liability for unrecognized income tax benefits. We accrued no penalties at either September 30, 2011, or December 31, 2010. As of September 30, 2011, and December 31, 2010, we had recorded $3.6 million for probable assessments of taxes other than income taxes. |
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The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Commitments And Contingencies
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| Commitments And Contingencies | 8. COMMITMENTS AND CONTINGENCIES Federal Clean Air Act We must comply with the Federal Clean Air Act, state laws and implementing regulations that impose, among other things, limitations on emissions generated during our operations, including sulfur dioxide (SO2), particulate matter, nitrogen oxides (NOx) and mercury. In addition, we must comply with the provisions of the Federal Clean Air Act Amendments of 1990 that require reductions in SO2 and NOx. Emissions from our generating facilities, including particulate matter, SO2 and NOx, have been determined by regulation to reduce visibility by causing or contributing to regional haze. Under federal laws, such as the Clean Air Visibility Rule, and pursuant to an agreement with the Kansas Department of Health and Environment (KDHE), we are required to install and maintain controls to reduce emissions found to cause or contribute to regional haze. Under the Federal Clean Air Act, the Environmental Protection Agency (EPA) sets National Ambient Air Quality Standards (NAAQS) for six criteria emissions considered harmful to public health and the environment, including particulate matter, NOx, ozone and SO2, which result from coal combustion. Areas meeting the NAAQS are designated attainment areas while those that do not meet the NAAQS are considered nonattainment areas. In 2009, KDHE proposed to designate portions of the Kansas City area nonattainment for the 8-hour ozone standard, which has the potential to impact our operations. Each state must develop a plan to bring nonattainment areas into compliance with the NAAQS. NAAQS must be reviewed by the EPA at five-year intervals. In 2010, the EPA strengthened the NAAQS for both NOx and SO2. We are currently evaluating what impact this could have on our operations. If we are required to install additional equipment to control emissions at our facilities, the revised NAAQS could have a material impact on our operations and consolidated financial results. Environmental Projects We will continue to make significant capital expenditures at our power plants to reduce regulated emissions. The amount of these expenditures could change materially depending on the timing and nature of required investments, the specific outcomes resulting from interpretation of existing regulations, new regulations, legislation and the manner in which we operate the plants. In addition to the capital investment, in the event we install new equipment, such equipment may cause us to incur significant increases in annual operating and maintenance expense and may reduce the net production, reliability and availability of the plants. The degree to which we will need to reduce emissions and the timing of when such emissions controls may be required is uncertain. Additionally, our ability to access capital markets and the availability of materials, equipment and contractors may affect the timing and ultimate amount of such capital investments. In comparison to a general rate case, the ECRR reduces the amount of time it takes to begin collecting in retail prices the costs of capital expenditures associated with environmental improvements, including those required by the Federal Clean Air Act. As previously discussed, we are not allowed to use the ECRR to collect our approximately $600.0 million share of the costs associated with the $1.2 billion of environmental upgrades at La Cygne. We must file an abbreviated rate case or general rate case with the KCC in order to collect these costs. In order to change our prices to collect increased operating and maintenance costs, we must file a general rate case with the KCC.
Air Emissions In July 2011, the EPA finalized the Cross-State Air Pollution Rule (CSAPR) which requires 27 states, including Kansas, to further reduce power plant emissions of SO2 and NOx. Under CSAPR, reductions in annual SO2 and NOx emissions are required to begin January 1, 2012, with further reductions required beginning January 1, 2014. The EPA is issuing federal implementation plans for each state covered by CSAPR, but is allowing states to submit their own implementation plans starting as early as 2013. There are a number of uncertainties relating to CSAPR, including how Kansas will implement the requirements. In addition, the implementation timeline for the finalized portion of CSAPR is abbreviated in comparison to EPA precedent for regulations of similar magnitude. To comply with the rule on January 1, 2012, we expect that we must modify the way in which we use our power plants, purchase power or purchase emission allowances, as there is insufficient time to install equipment needed to reduce emissions to the levels required by the rule. We believe compliance with the rule may impact the reliability of our electrical service. We could incur substantial fines and penalties for noncompliance. We cannot yet determine the impact this new rule will have on our operations or consolidated financial results, but it could be material. Greenhouse Gases Under EPA regulations finalized in May 2010, known as the tailoring rule, the EPA began regulating greenhouse gas (GHG) emissions from certain stationary sources in January 2011. The regulations are being implemented pursuant to two Federal Clean Air Act programs: the Title V Operating Permit program and the program requiring a permit if undergoing construction or major modifications, which is referred to as the Prevention of Significant Deterioration program (PSD). Obligations relating to Title V permits will include recordkeeping and monitoring requirements. With respect to PSD permits, projects that cause a significant increase in GHG emissions (currently defined to be more than 75,000 tons or more per year or 100,000 tons or more per year, depending on various factors), will be required to implement best available control technology (BACT). The EPA has issued guidance on what BACT entails for the control of GHGs and individual states are now required to determine what controls are required for facilities within their jurisdiction on a case-by-case basis. We cannot at this time determine the impact of these new regulations on our operations and consolidated financial results, but we believe the cost of compliance with new regulations could be material. Renewable Energy Standard In May 2009, Kansas enacted legislation that mandates, among other requirements, that more energy be derived from renewable sources. In years 2011 through 2015 net renewable generation capacity must be 10% of the average peak demand for the three prior years, subject to limited exceptions. This requirement increases to 15% for years 2016 through 2019 and 20% for 2020 and thereafter. We have worked with third parties to develop approximately 300 megawatts (MW) of qualifying renewable generation facilities which, together with the use of renewable energy credits, we expect will allow us to meet the 2011 requirement. In an order dated May 9, 2011, the KCC approved two separate agreements we entered into with third parties to purchase under 20-year supply contracts the renewable energy produced from approximately 370 MW of renewable generation beginning in late 2012 and the associated cost recovery. We expect these agreements, along with our prior development of renewable generation facilities, to satisfy our net renewable generation requirement through 2015 and contribute toward meeting the increased requirement beginning in 2016. If we are unable to meet future requirements, our operations and consolidated financial results could be adversely impacted. Manufactured Gas Sites We have been identified as being partially responsible for remediating a number of former manufactured gas sites located in Kansas. We and KDHE entered into a consent agreement governing all future work at these sites. Under terms of the consent agreement, we agreed to investigate and, if necessary, remediate these sites. Pursuant to an environmental indemnity agreement, ONEOK Inc. (ONEOK) assumed total liability for remediation of seven sites and we share liability for remediation with ONEOK for five sites. Our total liability for the five shared sites is capped at $3.8 million.
EPA Lawsuit In March 2010, the U.S. District Court in the District of Kansas approved a settlement agreement that we entered into with the parties of a lawsuit filed by the Department of Justice on behalf of the EPA. The lawsuit asserted that certain projects completed at JEC violated certain requirements of the EPA's New Source Review program, which requires companies to obtain permits and, if necessary, install control equipment to address emissions when making a major modification or a change in operation if either is expected to cause a significant net increase in emissions. As part of the settlement agreement, in 2009 we recorded $1.0 million for environmental mitigation projects that will be owned by a qualifying third party and a $3.0 million civil penalty. We will also invest $5.0 million over six years in environmental mitigation projects that we will own. In addition, we will install a selective catalytic reduction (SCR) on one of the three JEC coal units by the end of 2014. We estimate the cost of this to be approximately $240.0 million. Depending on the NOx emission reductions attained by the single SCR and attainable through the installation of other controls on the other two JEC coal units, we may have to install an SCR on another JEC unit by the end of 2016, if needed to meet plant-wide NOx reduction targets. We believe recovery of the costs to install these systems is recoverable through our ECRR, but remains subject to the approval of our regulators. We believe these costs are appropriate for inclusion in the prices we are allowed to charge customers. FERC Investigation A non-public investigation by the Federal Energy Regulatory Commission (FERC) of our use of transmission service between July 2006 and February 2008 remains pending. In May 2009, FERC staff alleged that we improperly used secondary network transmission service to facilitate off-system wholesale power sales in violation of applicable FERC orders and Southwest Power Pool (SPP) tariffs. FERC staff first alleged we received $14.3 million of unjust profits through such activities. We sent a response to FERC staff disputing both the legal basis for its allegations and their factual underpinnings. Based on our response, FERC staff substantially revised downward its preliminary conclusions to allege that we received $3.0 million of unjust profits and failed to pay $3.2 million to the SPP for transmission service. In March 2010, we sent a response to FERC staff disputing its revised conclusions. From time to time we respond to questions from FERC staff. We continue to believe that our use of transmission service was in compliance with FERC orders and SPP tariffs. We are unable to predict the outcome of this investigation or its impact on our consolidated financial results, but an adverse outcome could result in refunds and fines, the amounts of which could be material, and could potentially alter the manner in which we are permitted to buy and sell energy and use transmission service. |
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The entire disclosure for commitments and contingencies. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Legal Proceedings
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| Legal Proceedings [Abstract] | |
| Legal Proceedings | 9. LEGAL PROCEEDINGS In late 2002, one of our former executive officers resigned from his position and another executive officer was placed on administrative leave from his position. Following the completion of an investigation and the publication of a report prepared by a special committee of our board of directors, our board of directors determined that their employment was terminated for cause. In June 2003, we filed a demand for arbitration with the American Arbitration Association asserting claims against them arising out of their previous employment and seeking to avoid payment of compensation not yet paid to them under various plans and agreements. They filed counterclaims against us alleging substantial damages related to the termination of their employment and the publication of the report of the special committee. The arbitration was stayed in August 2004 pending final resolution of criminal charges filed against them in U.S. District Court in the District of Kansas. In August 2010, these criminal charges were dismissed and subsequently the stay of the arbitration was lifted. As of December 31, 2010, we had accrued liabilities of $80.6 million for compensation not yet paid to the former executive officers and $8.3 million for legal fees and expenses they had incurred. In May 2011, we reached an agreement with Douglas T. Lake, one of the former executive officers, settling all contractual obligations. Pursuant to the agreement, we paid him approximately $21.0 million and we paid approximately $5.3 million for his legal fees and expenses. In July 2011, we reached an agreement with David C. Wittig, the other former executive officer, settling all contractual obligations and providing for payments totaling approximately $36.0 million, the release of deferred stock for compensation shares and the payment of $3.1 million for his legal fees and expenses. In the third quarter of 2011, we reversed the remaining approximately $22.0 million of previously accrued liabilities, which reduced selling, general and administrative expense reported on our consolidated statement of income.
We and our subsidiaries are involved in various other legal, environmental and regulatory proceedings. We believe that adequate provisions have been made and accordingly believe that the ultimate disposition of such matters will not have a material adverse affect on our consolidated financial results. See Note 5, "Rate Matters and Regulation," and Note 8, "Commitments and Contingencies," for additional information. |
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Open legal proceedings in the normal course of business, including product liability and other litigation and contingencies. No definition available.
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Interim Pension And Post-Retirement Benefit Disclosure
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| Interim Pension And Post-Retirement Benefit Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Interim Pension And Post-Retirement Benefit Disclosure | 10. INTERIM PENSION AND POST-RETIREMENT BENEFIT DISCLOSURE The following table summarizes the net periodic costs for our pension and post-retirement benefit plans prior to the effects of capitalization.
During the nine months ended September 30, 2011 and 2010, we contributed $50.0 million and $22.4 million, respectively, to the Westar Energy pension trust. |
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The entire disclosure for pension and other postretirement benefits. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Wolf Creek Interim Pension And Post-Retirement Benefit Disclosure
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| Wolf Creek Interim Pension And Post-Retirement Benefit Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Wolf Creek Interim Pension And Post-Retirement Benefit Disclosure |
11. WOLF CREEK INTERIM PENSION AND POST-RETIREMENT BENEFIT DISCLOSURE As a co-owner of Wolf Creek, KGE is indirectly responsible for 47% of the liabilities and expenses associated with the Wolf Creek pension and post-retirement benefit plans. The following table summarizes the net periodic costs for KGE's 47% share of the Wolf Creek pension and post-retirement benefit plans prior to the effects of capitalization.
During the nine months ended September 30, 2011 and 2010, we funded $8.6 million and $5.1 million, respectively, of Wolf Creek's pension plan contribution. |
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Includes disclosure of the entity's share of an affiliate's pension and other post-retirement benefits. No definition available.
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Common Stock
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Sep. 30, 2011
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| Common Stock [Abstract] | |
| Common Stock | 12. COMMON STOCK During the nine months ended September 30, 2011, Westar Energy delivered approximately 4.2 million shares of common stock as settlement of the forward sale agreement entered into in April 2010. In connection with these settlement transactions, Westar Energy received proceeds of approximately $91.9 million. Westar Energy used the proceeds from the issuance of common stock to repay borrowings under its revolving credit facility, with such borrowed amounts principally related to investments in capital equipment, as well as for working capital and general corporate purposes. During the nine months ended September 30, 2011, Westar Energy did not deliver any shares of common stock under the forward sale agreement entered into in November 2010. Assuming physical share settlement of the approximately 8.5 million shares of common stock under this agreement at September 30, 2011, Westar Energy would have received aggregate proceeds of approximately $197.4 million based on a forward price of $23.28 per share. On May 19, 2011, Westar Energy shareholders approved an amendment to its Restated Articles of Incorporation to increase the number of shares of common stock authorized to be issued from 150.0 million to 275.0 million. |
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Tabular disclosure of an entity's stock, including par or stated value per share, number and dollar amount of share subscriptions, shares authorized, shares issued, shares outstanding, number and dollar amount of shares held in an employee trust, dividend per share, total dividends, share conversion features, par value plus additional paid in capital, the value of treasury stock and other information necessary to a fair presentation, and EPS information. Stock by class includes common, convertible, and preferred stocks which are not redeemable or redeemable solely at the option of the issuer. Includes preferred stock with redemption features that are solely within the control of the issuer and mandatorily redeemable stock if redemption is required to occur only upon liquidation or termination of the reporting entity. If more than one issue is outstanding, state the title of each issue and the corresponding dollar amount; dollar amount of any shares subscribed but unissued and the deduction of subscriptions receivable there from; number of shares authorized, issued, and outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Variable Interest Entities
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| Variable Interest Entities | 13. VARIABLE INTEREST ENTITIES In determining the primary beneficiary of a VIE, we assess the entity's purpose and design, including the nature of the entity's activities and the risks that the entity was designed to create and pass through to its variable interest holders. A reporting enterprise is deemed to be the primary beneficiary of a VIE if it has (a) the power to direct the activities of the VIE that most significantly impact the VIE's economic performance and (b) the obligation to absorb losses or right to receive benefits from the VIE that could potentially be significant to the VIE. The primary beneficiary of a VIE is required to consolidate the VIE. The trusts holding our 8% interest in JEC, our 50% interest in La Cygne unit 2 and railcars we use to transport coal to some of our plants are VIEs of which we are the primary beneficiary. We assess all entities with which we become involved to determine whether such entities are VIEs and, if so, whether or not we are the primary beneficiary of the entities. We also continuously assess whether we are the primary beneficiary of the VIEs with which we are involved. Prospective changes in facts and circumstances may cause us to reconsider our determination as it relates to the identification of the primary beneficiary. 8% Interest in Jeffrey Energy Center Under an agreement that expires in January 2019, we lease an 8% interest in JEC from a trust. The trust was financed with an equity contribution from an owner participant and debt issued by the trust. The trust was created specifically to purchase the 8% interest in JEC and lease it to a third party, and does not hold any other assets. We meet the requirements to be considered the primary beneficiary of the trust. In determining the primary beneficiary of the trust, we concluded that the activities of the trust that most significantly impact its economic performance and that we have the power to direct include (1) the operation and maintenance of the 8% interest in JEC, (2) our ability to exercise a purchase option at the end of the agreement at the lesser of fair value or a fixed amount and (3) our option to require refinancing of the trust's debt. We have the potential to receive benefits from the trust that could potentially be significant if the fair value of the 8% interest in JEC at the end of the agreement is greater than the fixed amount. The possibility of lower interest rates upon refinancing the debt also creates the potential for us to receive significant benefits. 50% Interest in La Cygne Unit 2 Under an agreement that expires in September 2029, KGE entered into a sale-leaseback transaction with a trust under which the trust purchased KGE's 50% interest in La Cygne unit 2 and subsequently leased it back to KGE. The trust was financed with an equity contribution from an owner participant and debt issued by the trust. The trust was created specifically to purchase the 50% interest in La Cygne unit 2 and lease it back to KGE, and does not hold any other assets. We meet the requirements to be considered the primary beneficiary of the trust. In determining the primary beneficiary of the trust, we concluded that the activities of the trust that most significantly impact its economic performance and that we have the power to direct include (1) the operation and maintenance of the 50% interest in La Cygne unit 2, (2) our ability to exercise a purchase option at the end of the agreement at the lesser of fair value or a fixed amount and (3) our option to require refinancing of the trust's debt. We have the potential to receive benefits from the trust that could potentially be significant if the fair value of the 50% interest in La Cygne unit 2 at the end of the agreement is greater than the fixed amount. The possibility of lower interest rates upon refinancing the debt also creates the potential for us to receive significant benefits.
Railcars Under two separate agreements that expire in May 2013 and November 2014, we lease railcars from trusts to transport coal to some of our power plants. The trusts were financed with equity contributions from owner participants and debt issued by the trusts. The trusts were created specifically to purchase the railcars and lease them to us, and do not hold any other assets. We meet the requirements to be considered the primary beneficiary of the trusts. In determining the primary beneficiary of the trusts, we concluded that the activities of the trusts that most significantly impact their economic performance and that we have the power to direct include the operation, maintenance and repair of the railcars and our ability to exercise a purchase option at the end of the agreements at the lesser of fair value or a fixed amount. We have the potential to receive benefits from the trusts that could potentially be significant if the fair value of the railcars at the end of the agreements is greater than the fixed amounts. Our agreements with these trusts also include renewal options during which time we would pay a fixed amount of rent. We have the potential to receive benefits from the trusts during the renewal periods if the fixed amount of rent is less than the amount we would be required to pay under a new agreement. Financial Statement Impact We have recorded the following assets and liabilities on our consolidated balance sheets related to the VIEs described above.
All of the liabilities noted in the table above relate to the VIEs' ownership of the reported property, plant and equipment. The assets of the VIEs can be used only to settle obligations of the VIEs and the VIEs' debt holders have no recourse to our general credit. We have not provided financial or other support to the VIEs and are not required to provide such support. We did not record any gain or loss upon initial consolidation of the VIEs. |
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Tabular disclosure of the significant judgments and assumptions made in determining whether a variable interest (as defined) held by the entity requires the variable interest entity (VIE) (as defined) to be consolidated and (or) disclose information about its involvement with the VIE, individually or in aggregate (as applicable); the nature of restrictions, if any, on the consolidated VIE's assets and on the settlement of its liabilities reported by an entity in its statement of financial position, including the carrying amounts of such assets and liabilities; the nature of, and changes in, the risks associated with involvement in the VIE; how involvement with the VIE affects the entity's financial position, financial performance, and cash flows; the lack of recourse if creditors (or beneficial interest holders) of the consolidated VIE have no recourse to the general credit of the primary beneficiary (if applicable); the terms of arrangements, giving consideration to both explicit arrangements and implicit variable interests, if any, that could require the entity to provide financial support to the VIE, including events or circumstances that could expose the entity to a loss; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; the significant factors considered and judgments made in determining that the power to direct the activities of a VIE that most significantly impact the VIE's economic performance are shared (as defined); the carrying amounts and classification of assets and liabilities of the VIE included in the statement of financial position; the entity's maximum exposure to loss, if any, as a result of its involvement with the VIE, including how the maximum exposure is determined and significant sources of the entity's exposure to the VIE; a comparison of the carrying amounts of the assets and liabilities and the entity's maximum exposure to loss; information about any liquidity arrangements, guarantees, and (or) other commitments by third parties that may affect the fair value or risk of the entity's variable interest in the VIE; whether or not the entity has provided financial support or other support (explicitly or implicitly) to the VIE that it was not previously contractually required to provide or whether the entity intends to provide that support, including the type and amount of the support and the primary reasons for providing the support; and supplemental information the entity determines necessary to provide. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Leases
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Sep. 30, 2011
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| Leases [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Leases | 14. LEASES Capital Leases We identify capital leases based on defined criteria. For both vehicles and computer equipment, new leases are signed each month based on the terms of master lease agreements. The lease term for vehicles is from two to seven years depending on the type of vehicle. Computer equipment has a lease term of four to five years. On April 28, 2011, FERC issued an order approving a power supply agreement with the City of McPherson, Kansas. The agreement extends through May 2039. The terms of the agreement meet the criteria such that it is classified as a capital lease. Consequently, we recorded a $40.0 million capital lease during the second quarter of 2011.
Assets recorded under capital leases are listed below.
Capital leases are treated as operating leases for rate making purposes. Minimum annual rental payments, excluding administrative costs such as property taxes, insurance and maintenance, under capital leases are listed below.
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The entire disclosure for lessee entity's leasing arrangements including, but not limited to, all of the following: (a.) The basis on which contingent rental payments are determined, (b.) The existence and terms of renewal or purchase options and escalation clauses, (c.) Restrictions imposed by lease agreements, such as those concerning dividends, additional debt, and further leasing. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Summary Of Significant Accounting Policies (Policy)
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Sep. 30, 2011
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| Summary Of Significant Accounting Policies [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Principles Of Consolidation | Principles of Consolidation We prepare our unaudited condensed consolidated financial statements in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, certain information and footnote disclosures normally included in financial statements presented in accordance with generally accepted accounting principles (GAAP) have been condensed or omitted. Our condensed consolidated financial statements include all operating divisions, majority owned subsidiaries and variable interest entities (VIEs) of which we maintain a controlling interest or are the primary beneficiary reported as a single operating segment. Intercompany accounts and transactions have been eliminated in consolidation. In our opinion, all adjustments, consisting only of normal recurring adjustments considered necessary for a fair presentation of the consolidated financial statements, have been included. The accompanying condensed consolidated financial statements and notes should be read in conjunction with the consolidated financial statements and notes included in our 2010 Form 10-K. |
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| Use Of Management's Estimates | Use of Management's Estimates When we prepare our condensed consolidated financial statements, we are required to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities at the date of our condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. We evaluate our estimates on an on-going basis, including those related to valuation of commodity contracts, depreciation, unbilled revenue, valuation of investments, valuation of our energy marketing portfolio, forecasted fuel costs included in our retail energy cost adjustment billed to customers, income taxes, pension and post-retirement benefits, our asset retirement obligations including the decommissioning of Wolf Creek, environmental issues, VIEs, contingencies and litigation. Actual results may differ from those estimates under different assumptions or conditions. The results of operations for the three and nine months ended September 30, 2011, are not necessarily indicative of the results to be expected for the full year. |
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| Allowance For Funds Used During Construction | Allowance for Funds Used During Construction Allowance for funds used during construction (AFUDC) represents the allowed cost of capital used to finance utility construction activity. We compute AFUDC by applying a composite rate to qualified construction work in progress. We credit other income (for equity funds) and interest expense (for borrowed funds) for the amount of AFUDC capitalized as construction cost on the accompanying consolidated statements of income as follows:
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| Earnings Per Share | Earnings Per Share We have participating securities in the form of unvested restricted share units (RSUs) with nonforfeitable rights to dividend equivalents that receive dividends as declared on an equal basis with common shares. As a result, we apply the two-class method of computing basic and diluted earnings per share (EPS). Under the two-class method, we reduce net income attributable to common stock by the amount of dividends declared in the current period. We allocate the remaining earnings to common stock and RSUs to the extent that each security may share in earnings as if all of the earnings for the period had been distributed. We determine the total earnings allocated to each security by adding together the amount allocated for dividends and the amount allocated for a participation feature. To compute basic EPS, we divide the earnings allocated to common stock by the weighted average equivalent common shares outstanding. Diluted EPS includes the effect of potential issuances of common shares resulting from our forward sale agreements, RSUs with forfeitable rights to dividend equivalents and stock options. We compute the dilutive effect of potential issuances of common shares using the treasury stock method.
The following table reconciles our basic and diluted EPS from net income.
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| Supplemental Cash Flow Information | Supplemental Cash Flow Information
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Disclosure of accounting policy for AFUDC (for example, component of PPE, credit to income statement), information regarding the inclusion in rates (only capitalized if its inclusion in rates is probable) and description of AFUDC (for example, represents the cost of capital used during construction). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The entire disclosure for supplemental cash flow activities, including cash, noncash, and part noncash transactions, for the period. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Disclosure of accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting. The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Disclosure of accounting policy for computing basic and diluted earnings or loss per share for each class of common stock and participating security. Addresses all significant policy factors, including any antidilutive items that have been excluded from the computation and takes into account stock dividends, splits and reverse splits that occur after the balance sheet date of the latest reporting period but before the issuance of the financial statements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Disclosure of accounting policy for the use of estimates in the preparation of financial statements in conformity with generally accepted accounting principles. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Summary Of Significant Accounting Policies (Tables)
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Sep. 30, 2011
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| Summary Of Significant Accounting Policies [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Reconciliation Of Basic And Diluted EPS |
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- Definition
Tabular disclosure of supplemental cash flow information for the periods presented. No definition available.
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- Definition
Tabular disclosure of an entity's basic and diluted earnings per share calculations. No definition available.
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- Definition
Tabular disclosure of an entity's allowance for funds used during construction. No definition available.
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Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management (Tables)
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9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2011
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| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Carrying Values And Fair Values Of Financial Instruments |
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| Fair Value Of Assets And Liabilities |
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| Reconciliations Of Assets And Liabilities At Fair Value |
The following table provides reconciliations of assets and liabilities measured at fair value using significant level 3 inputs for the three and nine months ended September 30, 2010.
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| Unrealized Gains And Losses On Financial Statements |
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| Investments In Financial Instruments |
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| Fair Value Of Commodity Derivative Instruments | Commodity Derivatives Not Designated as Hedging Instruments as of September 30, 2011
Commodity Derivatives Not Designated as Hedging Instruments as of December 31, 2010
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| Changes In The Fair Value Of Commodity Derivative Instruments |
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| Energy Related Products Contracts |
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| X | ||||||||||
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- Definition
Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income, and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issuances, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Tabular disclosure of the location and amount of gains and losses reported in the statement of financial performance, or when applicable, the statement of financial position. For example, (a) gains and losses recognized in the income statement on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges and (b) gains and losses initially recognized in other comprehensive income on derivative instruments designated and qualifying as cash flow hedges. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Tabular disclosure of the notional amounts of outstanding derivative positions. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
This item represents the disclosure regarding the investments in certain entities that calculate net asset value per share that enables users to understand the nature and risks of the investments and whether the investments are probable of being sold at amounts different from net asset value per share. Such disclosure may include (1) the fair value of the investments in the major category, and a description of the significant investment strategies of the investee(s) in the major category; (2) for each major category of investment that includes investments that can never be redeemed with the investees, but the reporting entity receives distributions through the liquidation of the underlying assets of the investees, the reporting entity's estimate of the period of time over which the underlying assets are expected to be liquidated by the investees; (3) the amount of the entity's unfunded commitments related to investments in the major category; (4) a general description of the terms and conditions upon which the investor may redeem investments in the major category; (5) the circumstances in which an otherwise redeemable investment in the major category might not be redeemable; (6) for those otherwise redeemable investments that are restricted from redemption as of the reporting entity's measurement date, the entity's best estimate of when the restriction from redemption might lapse; if an estimate cannot be made, the entity shall disclose that fact and how long the restriction has been in effect; (7) any other significant restriction on the ability to sell investments in the major category at the measurement date; (8) total fair value of held for sale investments and any remaining actions required to complete the sale when the reporting entity determines that it is probable that it will sell the investments for an amount different from net asset value per share; and (9) disclosure of an entity's plans to sell and any remaining actions required to complete the sale when the entity intends to sell a group of investments, but the individual investments to be sold have not been identified. No definition available.
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- Details
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| X | ||||||||||
|
- Definition
Schedule of Carrying Value and Fair Values of Financial Instruments. No definition available.
|
| X | ||||||||||
|
- Definition
Schedule of unrealized gains and losses recorded for assets and liabilities measured at fair value on a recurring basis using unobservable inputs. No definition available.
|
|
Financial Investments (Tables)
|
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Sep. 30, 2011
|
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| Financial Investments [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Costs And Fair Values Of Investments |
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value And The Gross Unrealized Losses Of The Available-For-Sale Securities |
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. No definition available.
|
| X | ||||||||||
|
- Definition
Tabular disclosure of investments in an unrealized loss position for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), including: (a) the aggregate related fair value of investments with unrealized losses, (b) the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
|
Interim Pension And Post-Retirement Benefit Disclosure (Tables)
|
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Sep. 30, 2011
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Interim Pension And Post-Retirement Benefit Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Net Periodic Costs For Pension And Post-Retirement Benefit Plans |
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Tabular disclosure of the costs related to the various types of retirement plans including defined benefit pension plan cost, defined contribution plan cost, other postretirement benefit plan cost, and net periodic benefit cost. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
|
Wolf Creek Interim Pension And Post-Retirement Benefit Disclosure (Tables)
|
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Sep. 30, 2011
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Wolf Creek Interim Pension And Post-Retirement Benefit Disclosure [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Net Periodic Costs For Pension And Post-Retirement Benefit Plans |
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
Wolf Creek [Member]
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Wolf Creek Interim Pension And Post-Retirement Benefit Disclosure [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Net Periodic Costs For Pension And Post-Retirement Benefit Plans |
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| X | ||||||||||
|
- Definition
Tabular disclosure of the costs related to the various types of retirement plans including defined benefit pension plan cost, defined contribution plan cost, other postretirement benefit plan cost, and net periodic benefit cost. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
|
Variable Interest Entities (Tables)
|
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Sep. 30, 2011
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Variable Interest Entities [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Assets And Liabilities In Relation To VIEs |
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The carrying amounts of assets and liabilities recorded in the statement of financial position related to consolidated variable interest entities. No definition available.
|
|
Leases (Tables)
|
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Sep. 30, 2011
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Leases [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Assets Recorded Under Capital Leases |
|
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| Minimum Annual Rental Payments |
|
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| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Tabular disclosure of long-lived, depreciable assets that are subject to a lease meeting the criteria for capitalization and are used in the normal conduct of business to produce goods and services. Examples may include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Tabular disclosure of future minimum lease payments as of the date of the latest balance sheet presented, in aggregate and for each of the five years succeeding fiscal years, with separate deductions from the total for the amount representing executor costs, including any profit thereon, included in the minimum lease payments and for the amount of the imputed interest necessary to reduce the net minimum lease payments to present value. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
|
Description Of Business (Details)
|
9 Months Ended |
|---|---|
|
Sep. 30, 2011
|
|
| Description Of Business [Abstract] | |
| Number of customers in Kansas | 687,000 |
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Number Of Customers Getting Electric Generation, Transmission And Distribution Services No definition available.
|
|
Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified |
9 Months Ended |
|---|---|
|
Sep. 30, 2011
|
|
| Summary Of Significant Accounting Policies [Abstract] | |
| Gain on sale of non-utility investment | $ (7,246) |
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The net realized gain (loss) on investments sold during the period, not including gains (losses) on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, which, for cash flow reporting, is a component of proceeds from investing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
|
Summary Of Significant Accounting Policies (Allowance For Funds Used During Construction) (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
|
Sep. 30, 2011
|
Sep. 30, 2010
|
Sep. 30, 2011
|
Sep. 30, 2010
|
|
| Summary Of Significant Accounting Policies [Abstract] | ||||
| Borrowed funds | $ 1,163 | $ 1,133 | $ 4,224 | $ 2,825 |
| Equity funds | 1,027 | 841 | 4,448 | 1,926 |
| Total | $ 2,190 | $ 1,974 | $ 8,672 | $ 4,751 |
| Average AFUDC rates | 3.20% | 2.70% | 4.00% | 2.40% |
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Total increase in earnings in the period representing the cost of equity (based on assumed rate of return) and/or borrowed funds (based on interest rate) used to finance construction of regulated assets, which is expected to be recovered through rate adjustments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
|
- Definition
The component of the allowance for funds used during construction during the period based on an assumed rate of return on equity funds used in financing the construction of regulated assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The component of the allowance for funds used during construction during the period comprised of interest on borrowed funds used in financing the construction of regulated assets, which may be reflected as a reduction of interest expense. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Disclosure of the effective rate for the period representing (a) total additions to qualifying regulated assets for allowance for funds used during construction, (b) divided by the sum of debt and equity funds used for construction. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
|
Summary Of Significant Accounting Policies (Reconciliation Of Basic And Diluted EPS) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
Sep. 30, 2011
|
Sep. 30, 2010
|
Sep. 30, 2011
|
Sep. 30, 2010
|
|||||||
| Summary Of Significant Accounting Policies [Abstract] | ||||||||||
| Net income | $ 136,392 | $ 115,863 | $ 214,874 | $ 202,074 | ||||||
| Less: Net income attributable to noncontrolling interests | 1,442 | 1,119 | 4,212 | 3,338 | ||||||
| NET INCOME ATTRIBUTABLE TO WESTAR ENERGY | 134,950 | 114,744 | 210,662 | 198,736 | ||||||
| Less: Preferred dividends | 242 | 242 | 727 | 727 | ||||||
| Net income allocated to RSUs | 440 | 629 | 617 | 1,067 | ||||||
| Net income allocated to common stock | $ 134,268 | $ 113,873 | $ 209,318 | $ 196,942 | ||||||
| Weighted average equivalent common shares outstanding - basic | 116,806,596 | 111,706,541 | 115,208,965 | 111,387,165 | ||||||
| RSUs | 203,401 | 200,480 | 171,003 | 155,903 | ||||||
| Forward sale agreements | 1,228,273 | 408,393 | 1,585,107 | 110,519 | ||||||
| Employee stock options | 74 | |||||||||
| Weighted average equivalent common shares outstanding - diluted | 118,238,270 | [1] | 112,315,414 | [1] | 116,965,075 | [1] | 111,653,661 | [1] | ||
| Earnings per common share, basic | $ 1.15 | $ 1.02 | $ 1.82 | $ 1.77 | ||||||
| Earnings per common share, diluted | $ 1.14 | $ 1.01 | $ 1.79 | $ 1.76 | ||||||
| Antidilutive shares | 0 | 0 | 0 | 0 | ||||||
|
||||||||||
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Equity impact of aggregate cash, stock, and paid-in-kind dividends declared for preferred shareholders during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of call options and warrants using the treasury stock method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Nonvested equity-based payment awards that contain forfeitable rights to dividends or dividend equivalents (whether paid or unpaid) that result in incremental common shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The portion of net Income or Loss attributable to the noncontrolling interest (if any) deducted in order to derive the portion attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Aggregate of earnings distributed and earnings allocated to participating securities under the two-class method to the extent that participating securities may share in earnings as if all of the earnings for the period had been distributed. No definition available.
|
| X | ||||||||||
|
- Definition
The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Earnings distributed and earnings allocated to common stock under the two-class method. No definition available.
|
| X | ||||||||||
|
- Definition
Additional common shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of equity forward sale agreements using the treasury stock method. No definition available.
|
|
Summary Of Significant Accounting Policies (Supplemental Cash Flow Information) (Details) (USD $)
In Thousands, unless otherwise specified |
9 Months Ended | |
|---|---|---|
|
Sep. 30, 2011
|
Sep. 30, 2010
|
|
| Summary Of Significant Accounting Policies [Line Items] | ||
| Interest on financing activities | $ 101,146 | $ 101,941 |
| Income taxes, net of refunds | (16,097) | (38,017) |
| Property, plant and equipment additions | 86,644 | 30,443 |
| Jeffrey Energy Center (JEC) 8% leasehold interest | (108,706) | |
| Issuance of common stock for reinvested dividends and compensation plans | 8,587 | 13,492 |
| Capital lease for JEC 8% leasehold interest | (106,423) | |
| Assets acquired through capital leases | 43,199 | 321 |
|
Jeffrey Energy Center [Member]
|
||
| Summary Of Significant Accounting Policies [Line Items] | ||
| Percentage of leasehold interest | 8.00% | |
|
Variable Interest Entity, Primary Beneficiary [Member]
|
||
| Summary Of Significant Accounting Policies [Line Items] | ||
| Interest on financing activities | 17,954 | 19,843 |
| Property, plant and equipment additions | 356,964 | |
| Debt of VIEs | $ 337,951 | |
| X | ||||||||||
|
- Definition
The increase during the period in capital lease obligations due to entering into new capital leases. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of cash paid for interest during the period net of cash paid for interest that is capitalized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of debt that an Entity assumes in acquiring a business or in consideration for an asset received in a noncash (or part noncash) acquisition. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of fixed assets that an Entity acquires in a noncash (or part noncash) acquisition. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The fair value of stock issued in noncash financing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The leasehold interest percentage held by an entity. No definition available.
|
| X | ||||||||||
|
- Definition
Capital lease obligation an entity acquired or disposed of in noncash (or part noncash) acquisition. No definition available.
|
| X | ||||||||||
|
- Definition
Leasehold interest an entity acquired or disposed of in noncash (or part noncash) acquisition. No definition available.
|
| X | ||||||||||
|
- Details
|
|
Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management (Narrative) (Details) (USD $)
|
Sep. 30, 2011
|
Dec. 31, 2010
|
Jul. 21, 2010
|
|---|---|---|---|
| Derivative Instruments, Gain (Loss) [Line Items] | |||
| Obligation to return cash collateral | $ 400,000 | $ 700,000 | |
| Right to reclaim cash collateral | 0 | 0 | |
| Treasury yield hedge transaction date | July 21, 2010 | ||
| Aggregate fair value of derivative instruments with credit-risk-related contingent features | 600,000 | 1,600,000 | |
| Aggregate fair value of collateral already posted | 0 | ||
| Aggregate fair value additional collateral | 500,000 | 1,600,000 | |
| Treasury yield hedges | 7,711,000 | ||
|
Cash Flow Hedges [Member]
|
|||
| Derivative Instruments, Gain (Loss) [Line Items] | |||
| Notional amount | 125,000,000 | ||
| Treasury yield hedges | $ 31,300,000 | $ 7,700,000 |
| X | ||||||||||
|
- Definition
The aggregate fair value of additional assets that would be required to be posted as collateral for derivative instruments with credit-risk-related contingent features if the credit-risk-related contingent features were triggered at the end of the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of the obligation to return cash collateral under master netting arrangements that have not been offset against net derivative instrument positions. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of the right to reclaim cash collateral under master netting arrangements that have not been offset against net derivative instrument positions. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The aggregate fair value amounts of derivative instruments that contain credit-risk-related contingent features that are in a net liability position at the end of the reporting period. For nonderivative instruments that are designated and qualify as hedging instruments, the fair value amounts are the carrying value of the nonderivative hedging instrument, including the adjustment for the foreign currency transaction gain (loss) on that instrument. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Fair value as of the balance sheet date of all interest rate derivative assets designated as cash flow hedging instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Aggregate notional amount of all derivatives designated as cash flow hedging instruments. The notional amount relates to a number of currency units, shares, bushels, pounds, or other units specified in a derivative instrument. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Treasury Yield Hedge Transaction Date No definition available.
|
|
Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management (Carrying Values And Fair Values Of Financial Instruments) (Details) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2011
|
Dec. 31, 2010
|
|---|---|---|
|
Fixed Rate Debt [Member]
|
||
| Debt Instrument [Line Items] | ||
| Carrying Value | $ 2,373,063 | $ 2,373,373 |
| Fair Value | 2,605,760 | 2,570,648 |
|
Fixed Rate Debt Of Variable Interest Entities [Member]
|
||
| Debt Instrument [Line Items] | ||
| Carrying Value | 276,877 | 308,317 |
| Fair Value | $ 292,235 | $ 341,328 |
| X | ||||||||||
|
- Definition
Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
|
Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management (Fair Value Of Assets And Liabilities) (Details) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2011
|
Dec. 31, 2010
|
|---|---|---|
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Energy Marketing Contracts, Assets | $ 13,584 | $ 22,477 |
| Total Nuclear Decommissioning Trust | 121,050 | 126,990 |
| Total Trading Securities, Assets | 37,264 | 39,412 |
| Treasury yield hedges | 7,711 | |
| Total Assets Measured at Fair Value | 171,898 | 196,590 |
| Energy Marketing Contracts, Liabilities | 3,031 | 9,680 |
| Treasury Yield Hedges | 31,307 | |
| Total Liabilities Measured at Fair Value | 34,338 | |
|
Level 1 [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Energy Marketing Contracts, Assets | 2,432 | |
| Total Nuclear Decommissioning Trust | 47 | 44 |
| Total Assets Measured at Fair Value | 47 | 2,476 |
| Energy Marketing Contracts, Liabilities | 1,888 | |
|
Level 2 [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Energy Marketing Contracts, Assets | 2,608 | 6,258 |
| Total Nuclear Decommissioning Trust | 110,586 | 120,725 |
| Total Trading Securities, Assets | 37,264 | 39,412 |
| Treasury yield hedges | 7,711 | |
| Total Assets Measured at Fair Value | 150,458 | 174,106 |
| Energy Marketing Contracts, Liabilities | 2,462 | 5,820 |
| Treasury Yield Hedges | 31,307 | |
| Total Liabilities Measured at Fair Value | 33,769 | |
|
Level 3 [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Energy Marketing Contracts, Assets | 10,976 | 13,787 |
| Total Nuclear Decommissioning Trust | 10,417 | 6,221 |
| Total Assets Measured at Fair Value | 21,393 | 20,008 |
| Energy Marketing Contracts, Liabilities | 569 | 1,972 |
| Total Liabilities Measured at Fair Value | 569 | |
|
Domestic Equity [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 49,056 | 63,453 |
| Total Trading Securities, Assets | 18,873 | 21,207 |
|
Domestic Equity [Member] | Level 2 [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 45,475 | 60,586 |
| Total Trading Securities, Assets | 18,873 | 21,207 |
|
Domestic Equity [Member] | Level 3 [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 3,581 | 2,867 |
|
International Equity [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 21,842 | 18,966 |
| Total Trading Securities, Assets | 4,648 | 5,128 |
|
International Equity [Member] | Level 2 [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 21,842 | 18,966 |
| Total Trading Securities, Assets | 4,648 | 5,128 |
|
Core Bonds [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 22,440 | 31,906 |
| Total Trading Securities, Assets | 13,743 | 13,077 |
|
Core Bonds [Member] | Level 2 [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 22,440 | 31,906 |
| Total Trading Securities, Assets | 13,743 | 13,077 |
|
High-Yield Bonds [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 8,577 | 9,572 |
|
High-Yield Bonds [Member] | Level 2 [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 8,577 | 9,267 |
|
High-Yield Bonds [Member] | Level 3 [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 305 | |
|
Emerging Market Bonds [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 4,975 | |
|
Emerging Market Bonds [Member] | Level 2 [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 4,975 | |
|
Combination Debt Or Equity Fund [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 7,277 | |
|
Combination Debt Or Equity Fund [Member] | Level 2 [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 7,277 | |
|
Real Estate Securities [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 6,836 | 3,049 |
|
Real Estate Securities [Member] | Level 3 [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 6,836 | 3,049 |
|
Cash Equivalents [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 47 | 44 |
|
Cash Equivalents [Member] | Level 1 [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | $ 47 | $ 44 |
| X | ||||||||||
|
- Definition
This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. No definition available.
|
| X | ||||||||||
|
- Definition
The fair value of investments held in a trust fund to pay for the costs of decontaminating and decommissioning facilities, whether such amount is presented as a separate caption or as a parenthetical disclosure on the balance sheet. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as an asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as a liability. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Fair value as of the balance sheet date of all interest rate derivative assets designated as cash flow hedging instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Fair value as of the balance sheet date of all interest rate derivative liabilities designated as cash flow hedging instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
This element represents the aggregate of the liabilities reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. No definition available.
|
| X | ||||||||||
|
- Definition
This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Trading Securities which consist of all investments in certain debt and equity securities that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time) or for which an entity has elected the fair value option. Trading generally reflects active and frequent buying and selling, and trading securities are generally used with the objective of generating profits on short-term differences in price, but this category of investments may also include items which are not intended to be sold in the near term or for which the fair value option has been elected. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
|
Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management (Reconciliations Of Assets And Liabilities At Fair Value) (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Sep. 30, 2011
|
Sep. 30, 2010
|
Sep. 30, 2011
|
Sep. 30, 2010
|
|||||||||||
| Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] | ||||||||||||||
| Balance | $ 17,300 | $ 27,374 | $ 18,036 | $ 15,948 | ||||||||||
| Earnings | (886) | [1] | (11) | [1] | (1,152) | [1] | (1,840) | [1] | ||||||
| Regulatory assets | (375) | (644) | (765) | 2,499 | ||||||||||
| Regulatory liabilities | 1,761 | 2,166 | 2,442 | 7,196 | ||||||||||
| Purchases | 1,337 | 649 | ||||||||||||
| Sales | 1,752 | 1,314 | ||||||||||||
| Settlements | (65) | 300 | ||||||||||||
| Purchases, issuances and settlements | (8,746) | (3,720) | ||||||||||||
| Transfers into level 2 | (56) | |||||||||||||
| Balance | 20,824 | 20,083 | 20,824 | 20,083 | ||||||||||
|
Energy Marketing Contracts, Net [Member]
|
||||||||||||||
| Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] | ||||||||||||||
| Balance | 10,893 | 15,933 | 11,815 | 4,310 | ||||||||||
| Earnings | (886) | [1] | (11) | [1] | (1,152) | [1] | (1,840) | [1] | ||||||
| Regulatory assets | (375) | [2] | (644) | [2] | (765) | [2] | 2,499 | [2] | ||||||
| Regulatory liabilities | 1,267 | [2] | 2,191 | [2] | 1,801 | [2] | 7,574 | [2] | ||||||
| Purchases | (2,235) | (3,307) | ||||||||||||
| Sales | 1,808 | 1,715 | ||||||||||||
| Settlements | (65) | 300 | ||||||||||||
| Purchases, issuances and settlements | (2,944) | 1,926 | ||||||||||||
| Transfers into level 2 | (56) | [3] | ||||||||||||
| Balance | 10,407 | 14,469 | 10,407 | 14,469 | ||||||||||
|
Domestic Equity [Member]
|
||||||||||||||
| Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] | ||||||||||||||
| Balance | 3,111 | 2,547 | 2,867 | 2,262 | ||||||||||
| Earnings | [1] | [1] | ||||||||||||
| Regulatory assets | ||||||||||||||
| Regulatory liabilities | 330 | (100) | 229 | 29 | ||||||||||
| Purchases | 140 | 501 | ||||||||||||
| Sales | (16) | |||||||||||||
| Purchases, issuances and settlements | 156 | |||||||||||||
| Transfers into level 2 | ||||||||||||||
| Balance | 3,581 | 2,447 | 3,581 | 2,447 | ||||||||||
|
High-Yield Bonds [Member]
|
||||||||||||||
| Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] | ||||||||||||||
| Balance | 6,122 | 305 | 5,741 | |||||||||||
| Earnings | [1] | [1] | ||||||||||||
| Regulatory assets | ||||||||||||||
| Regulatory liabilities | (15) | 366 | ||||||||||||
| Sales | (305) | |||||||||||||
| Purchases, issuances and settlements | (5,802) | (5,802) | ||||||||||||
| Transfers into level 2 | ||||||||||||||
| Balance | 305 | 305 | ||||||||||||
|
Real Estate Securities [Member]
|
||||||||||||||
| Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] | ||||||||||||||
| Balance | 3,296 | 2,772 | 3,049 | 3,635 | ||||||||||
| Earnings | [1] | [1] | ||||||||||||
| Regulatory assets | ||||||||||||||
| Regulatory liabilities | 164 | 90 | 412 | (773) | ||||||||||
| Purchases | 3,432 | 3,455 | ||||||||||||
| Sales | (56) | (80) | ||||||||||||
| Purchases, issuances and settlements | ||||||||||||||
| Transfers into level 2 | ||||||||||||||
| Balance | $ 6,836 | $ 2,862 | $ 6,836 | $ 2,862 | ||||||||||
|
||||||||||||||
| X | ||||||||||
|
- Definition
This element represents total gains or losses for the period (realized and unrealized), arising from assets measured at fair value on a recurring basis using unobservable inputs (Level 3), which are included in earnings or resulted in a change in net asset value. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Purchases that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
This element represents purchases, sales, issuances, and settlements (net) which have taken place during the period in relation to assets measured at fair value on a recurring basis using unobservable inputs (Level 3). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Sales that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Settlements that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
This element represents an asset measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The amount of the transfers of assets or liabilities measured on a recurring basis out of Level 3 of the fair value hierarchy into Level 2. No definition available.
|
| X | ||||||||||
|
- Definition
This element represents total gains or losses for the period (realized and unrealized), arising from assets measured at fair value on a recurring basis using unobservable inputs (Level 3), which are included in regulatory assets on the statement of financial position. No definition available.
|
| X | ||||||||||
|
- Definition
This element represents total gains or losses for the period (realized and unrealized), arising from assets measured at fair value on a recurring basis using unobservable inputs (Level 3), which are included in regulatory liabilities on the statement of financial position. No definition available.
|
|
Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management (Unrealized Gains And Losses On Financial Statements) (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Sep. 30, 2011
|
Sep. 30, 2010
|
Sep. 30, 2011
|
Sep. 30, 2010
|
|||||||||
| Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] | ||||||||||||
| Earnings | $ (264) | [1] | $ (310) | [1] | $ (570) | [1] | $ (490) | [1] | ||||
| Regulatory assets | 28 | (1,834) | (233) | 749 | ||||||||
| Regulatory liabilities | 1,027 | (883) | 1,646 | 3,996 | ||||||||
| Total | 791 | (3,027) | 843 | 4,255 | ||||||||
|
Energy Marketing Contracts, Net [Member]
|
||||||||||||
| Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] | ||||||||||||
| Earnings | (264) | [1] | (310) | [1] | (570) | [1] | (490) | [1] | ||||
| Regulatory assets | 28 | [2] | (1,834) | [2] | (233) | [2] | 749 | [2] | ||||
| Regulatory liabilities | 590 | [2] | (461) | [2] | 1,101 | [2] | 4,765 | [2] | ||||
| Total | 354 | (2,605) | 298 | 5,024 | ||||||||
|
Domestic Equity [Member]
|
||||||||||||
| Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] | ||||||||||||
| Earnings | [1] | [1] | [1] | [1] | ||||||||
| Regulatory assets | ||||||||||||
| Regulatory liabilities | 330 | (100) | 213 | 35 | ||||||||
| Total | 330 | (100) | 213 | 35 | ||||||||
|
High-Yield Bonds [Member]
|
||||||||||||
| Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] | ||||||||||||
| Earnings | [1] | [1] | [1] | [1] | ||||||||
| Regulatory assets | ||||||||||||
| Regulatory liabilities | (412) | (31) | ||||||||||
| Total | (412) | (31) | ||||||||||
|
Real Estate Securities [Member]
|
||||||||||||
| Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] | ||||||||||||
| Earnings | [1] | [1] | [1] | [1] | ||||||||
| Regulatory assets | ||||||||||||
| Regulatory liabilities | 107 | 90 | 332 | (773) | ||||||||
| Total | $ 107 | $ 90 | $ 332 | $ (773) | ||||||||
|
||||||||||||
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
This element represents total unrealized gains or losses for the period arising from assets and liabilities measured at fair value on a recurring basis using unobservable inputs (Level 3), which are included in regulatory assets on the statement of financial position. No definition available.
|
| X | ||||||||||
|
- Definition
This element represents total unrealized gains or losses for the period arising from assets and liabilities measured at fair value on a recurring basis using unobservable inputs (Level 3), which are included in regulatory liabilities on the statement of financial position. No definition available.
|
| X | ||||||||||
|
- Definition
This element represents total unrealized gains or losses for the period arising from assets and liabilities measured at fair value on a recurring basis using unobservable inputs (Level 3). No definition available.
|
| X | ||||||||||
|
- Definition
This element represents total unrealized gains or losses for the period arising from assets and liabilities measured at fair value on a recurring basis using unobservable inputs (Level 3), which are included in earnings or resulted in a change in net asset value. No definition available.
|
|
Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management (Investments In Financial Instruments) (Details) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2011
|
Dec. 31, 2010
|
|---|---|---|
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | $ 121,050 | $ 126,990 |
| Total Trading Securities, Assets | 37,264 | 39,412 |
| Total | 171,898 | 196,590 |
|
Domestic Equity [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 49,056 | 63,453 |
| Total Trading Securities, Assets | 18,873 | 21,207 |
|
High-Yield Bonds [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 8,577 | 9,572 |
|
International Equity [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 21,842 | 18,966 |
| Total Trading Securities, Assets | 4,648 | 5,128 |
|
Core Bonds [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 22,440 | 31,906 |
| Total Trading Securities, Assets | 13,743 | 13,077 |
|
Real Estate Securities [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 6,836 | 3,049 |
|
Cash Equivalents [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 47 | 44 |
|
Fair Value [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 10,417 | 6,221 |
| Total Trading Securities, Assets | 37,264 | 39,412 |
| Total | 47,681 | 45,633 |
|
Fair Value [Member] | Domestic Equity [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 3,581 | 2,867 |
| Total Trading Securities, Assets | 18,873 | 21,207 |
|
Fair Value [Member] | High-Yield Bonds [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 305 | |
|
Fair Value [Member] | International Equity [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Trading Securities, Assets | 4,648 | 5,128 |
|
Fair Value [Member] | Core Bonds [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Trading Securities, Assets | 13,743 | 13,077 |
|
Fair Value [Member] | Real Estate Securities [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 6,836 | 3,049 |
|
Unfunded Commitments [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 2,022 | 2,523 |
| Total Trading Securities, Assets | ||
| Total | 2,022 | 2,523 |
|
Unfunded Commitments [Member] | Domestic Equity [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | 2,022 | 2,523 |
| Total Trading Securities, Assets | ||
|
Unfunded Commitments [Member] | High-Yield Bonds [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust | ||
|
Unfunded Commitments [Member] | International Equity [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Trading Securities, Assets | ||
|
Unfunded Commitments [Member] | Core Bonds [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Trading Securities, Assets | ||
|
Unfunded Commitments [Member] | Real Estate Securities [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Total Nuclear Decommissioning Trust |
| X | ||||||||||
|
- Definition
This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. No definition available.
|
| X | ||||||||||
|
- Definition
The fair value of investments held in a trust fund to pay for the costs of decontaminating and decommissioning facilities, whether such amount is presented as a separate caption or as a parenthetical disclosure on the balance sheet. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Trading Securities which consist of all investments in certain debt and equity securities that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time) or for which an entity has elected the fair value option. Trading generally reflects active and frequent buying and selling, and trading securities are generally used with the objective of generating profits on short-term differences in price, but this category of investments may also include items which are not intended to be sold in the near term or for which the fair value option has been elected. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
|
Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management (Fair Value Of Commodity Derivative Instruments) (Details) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2011
|
Dec. 31, 2010
|
|---|---|---|
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Derivative instruments not designated as hedging instruments, energy marketing contracts, assets | $ 13,584 | $ 22,477 |
| Derivative instruments not designated as hedging instruments, energy marketing contracts, liabilities | 3,031 | 9,680 |
|
Current Assets [Member] | Energy Marketing Contracts, Net [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Derivative instruments not designated as hedging instruments, energy marketing contracts, assets | 6,120 | 13,005 |
|
Other Assets [Member] | Energy Marketing Contracts, Net [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Derivative instruments not designated as hedging instruments, energy marketing contracts, assets | 7,464 | 9,472 |
|
Current Liabilities [Member] | Energy Marketing Contracts, Net [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Derivative instruments not designated as hedging instruments, energy marketing contracts, liabilities | 3,031 | 9,670 |
|
Long-Term Liabilities [Member] | Energy Marketing Contracts, Net [Member]
|
||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||
| Derivative instruments not designated as hedging instruments, energy marketing contracts, liabilities | $ 10 |
| X | ||||||||||
|
- Definition
Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as an asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as a liability. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
|
Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management (Changes In The Fair Value Of Commodity Derivative Instruments) (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
|
Sep. 30, 2011
|
Sep. 30, 2010
|
Sep. 30, 2011
|
Sep. 30, 2010
|
|
|
Revenues Increase (Decrease) [Member]
|
||||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||||
| Revenues increase (decrease), Net Gain Recognized | $ 1,212 | |||
| Revenues increase (decrease), Net Loss Recognized | (258) | (857) | (597) | |
|
Regulatory Liabilities Decrease [Member]
|
||||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||||
| Regulatory liabilities (decrease) increase, Net Gain Recognized | ||||
| Regulatory liabilities (decrease) increase, Net Loss Recognized | (8) | (1,215) | ||
|
Regulatory Assets Decrease [Member]
|
||||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||||
| Regulatory assets decrease, Net Gain Recognized | (43) | (7,197) | ||
| Regulatory assets decrease, Net Loss Recognized | ||||
|
Regulatory Liabilities (Decrease) Increase [Member]
|
||||
| Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management [Line Items] | ||||
| Regulatory liabilities (decrease) increase, Net Gain Recognized | 4,051 | |||
| Regulatory liabilities (decrease) increase, Net Loss Recognized | $ (877) | |||
| X | ||||||||||
|
- Definition
Gain included in earnings for the period from the change in fair value of derivative instruments not designated as hedging instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Loss included in earnings for the period from the change in fair value of derivative instruments not designated as hedging instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of gain recognized in regulatory assets during the period on derivative instruments not designated as hedging instruments. No definition available.
|
| X | ||||||||||
|
- Definition
The amount of gain recognized in regulatory liabilities during the period on derivative instruments not designated as hedging instruments. No definition available.
|
| X | ||||||||||
|
- Definition
The amount of loss recognized in regulatory assets during the period on derivative instruments not designated as hedging instruments. No definition available.
|
| X | ||||||||||
|
- Definition
The amount of loss recognized in regulatory liabilities during the period on derivative instruments not designated as hedging instruments. No definition available.
|
| X | ||||||||||
|
- Details
|
|
Financial And Derivative Instruments, Trading Securities, Energy Marketing And Risk Management (Energy Related Products Contracts) (Details)
|
Sep. 30, 2011
MWH
|
Dec. 31, 2010
MWH
|
|---|---|---|
|
Derivative Electricity Contracts [Member]
|
||
| Debt Instrument [Line Items] | ||
| Derivative, Nonmonetary Notional Amount | 2,524,491 | 2,791,966 |
|
Derivative Natural Gas Contracts [Member]
|
||
| Debt Instrument [Line Items] | ||
| Derivative, Nonmonetary Notional Amount | 92,000 | 1,150,000 |
| X | ||||||||||
|
- Definition
Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
|
Financial Investments (Narrative) (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
|
Sep. 30, 2011
|
Sep. 30, 2010
|
Sep. 30, 2011
|
Sep. 30, 2010
|
|
| Schedule of Available-for-sale Securities [Line Items] | ||||
| Unrealized gains (losses) | $ (4.7) | $ 3.2 | $ (2.6) | $ 2.2 |
| Realized gains (losses) on available-for-sale-securities | 0.1 | (0.3) | 1.3 | 13.2 |
| Fair value of the debt securities in the NDT fund | $ 36.0 | $ 36.0 | ||
|
Domestic Equity [Member]
|
||||
| Schedule of Available-for-sale Securities [Line Items] | ||||
| Allocation of NDT funds | 40.00% | |||
|
International Equity [Member]
|
||||
| Schedule of Available-for-sale Securities [Line Items] | ||||
| Allocation of NDT funds | 18.00% | |||
|
Core Bonds [Member]
|
||||
| Schedule of Available-for-sale Securities [Line Items] | ||||
| Allocation of NDT funds | 19.00% | |||
| Core bond fund investment limit percent, minimum | 80.00% | |||
|
High-Yield Bonds [Member]
|
||||
| Schedule of Available-for-sale Securities [Line Items] | ||||
| Allocation of NDT funds | 7.00% | |||
|
Real Estate Securities [Member]
|
||||
| Schedule of Available-for-sale Securities [Line Items] | ||||
| Allocation of NDT funds | 6.00% | |||
|
Emerging Market Bonds [Member]
|
||||
| Schedule of Available-for-sale Securities [Line Items] | ||||
| Allocation of NDT funds | 4.00% | |||
|
Combination Debt Or Equity Fund [Member]
|
||||
| Schedule of Available-for-sale Securities [Line Items] | ||||
| Allocation of NDT funds | 6.00% | |||
|
Cash and Cash Equivalents [Member]
|
||||
| Schedule of Available-for-sale Securities [Line Items] | ||||
| Allocation of NDT funds | 1.00% | |||
| X | ||||||||||
|
- Definition
For an unclassified balance sheet, total of debt securities categorized neither as held-to-maturity nor trading. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
This item represents the difference between the gross realized gains and losses realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of trading securities held at each balance sheet date, that was included in earnings for the period. Trading securities are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time) and the change in net unrealized holding gain (loss) is included in earnings for the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Investments in Investment Grade Corporate And Government Fixed Income Securities No definition available.
|
| X | ||||||||||
|
- Definition
Nuclear Decommissioning Trust Funds Allocated To Different Securities No definition available.
|
|
Financial Investments (Costs And Fair Values Of Investments) (Details) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2011
|
Dec. 31, 2010
|
|---|---|---|
| Schedule of Available-for-sale Securities [Line Items] | ||
| Cost | $ 128,746 | $ 123,232 |
| Gross Unrealized Gain | 936 | 7,175 |
| Gross Unrealized Loss | (8,632) | (3,417) |
| Fair Value | 121,050 | 126,990 |
|
Domestic Equity [Member]
|
||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Cost | 50,949 | 58,592 |
| Gross Unrealized Gain | 103 | 4,972 |
| Gross Unrealized Loss | (1,996) | (111) |
| Fair Value | 49,056 | 63,453 |
|
International Equity [Member]
|
||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Cost | 24,954 | 17,249 |
| Gross Unrealized Gain | 1,717 | |
| Gross Unrealized Loss | (3,112) | |
| Fair Value | 21,842 | 18,966 |
|
Core Bonds [Member]
|
||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Cost | 21,653 | 32,054 |
| Gross Unrealized Gain | 787 | |
| Gross Unrealized Loss | (148) | |
| Fair Value | 22,440 | 31,906 |
|
High-Yield Bonds [Member]
|
||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Cost | 8,951 | 9,086 |
| Gross Unrealized Gain | 486 | |
| Gross Unrealized Loss | (374) | |
| Fair Value | 8,577 | 9,572 |
|
Real Estate Securities [Member]
|
||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Cost | 9,662 | 6,207 |
| Gross Unrealized Gain | ||
| Gross Unrealized Loss | (2,826) | (3,158) |
| Fair Value | 6,836 | 3,049 |
|
Cash Equivalents [Member]
|
||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Cost | 47 | 44 |
| Gross Unrealized Gain | ||
| Gross Unrealized Loss | ||
| Fair Value | 47 | 44 |
|
Emerging Market Bonds [Member]
|
||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Cost | 4,929 | |
| Gross Unrealized Gain | 46 | |
| Gross Unrealized Loss | ||
| Fair Value | 4,975 | |
|
Combination Debt Or Equity Fund [Member]
|
||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Cost | 7,601 | |
| Gross Unrealized Loss | (324) | |
| Fair Value | $ 7,277 |
| X | ||||||||||
|
- Definition
This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
This item represents the gross unrealized losses for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities. No definition available.
|
| X | ||||||||||
|
- Details
|
|
Financial Investments (Fair Value And The Gross Unrealized Losses Of the Available-For-Sale Securities) (Details) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2011
|
Dec. 31, 2010
|
|---|---|---|
| Schedule of Available-for-sale Securities [Line Items] | ||
| Fair Value, Less than 12 Months | $ 83,171 | $ 34,773 |
| Gross Unrealized Losses, Less than 12 Months | (5,806) | (259) |
| Fair Value, 12 Months or Greater | 6,836 | 3,049 |
| Gross Unrealized Losses, 12 Months or Greater | (2,826) | (3,158) |
| Fair Value, Total | 90,007 | 37,822 |
| Gross Unrealized Losses, Total | (8,632) | (3,417) |
|
Domestic Equity [Member]
|
||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Fair Value, Less than 12 Months | 45,475 | 2,867 |
| Gross Unrealized Losses, Less than 12 Months | (1,996) | (111) |
| Fair Value, 12 Months or Greater | ||
| Gross Unrealized Losses, 12 Months or Greater | ||
| Fair Value, Total | 45,475 | 2,867 |
| Gross Unrealized Losses, Total | (1,996) | (111) |
|
International Equity [Member]
|
||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Fair Value, Less than 12 Months | 21,842 | |
| Gross Unrealized Losses, Less than 12 Months | (3,112) | |
| Fair Value, Total | 21,842 | |
| Gross Unrealized Losses, Total | (3,112) | |
|
High-Yield Bonds [Member]
|
||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Fair Value, Less than 12 Months | 8,577 | |
| Gross Unrealized Losses, Less than 12 Months | (374) | |
| Fair Value, Total | 8,577 | |
| Gross Unrealized Losses, Total | (374) | |
|
Combination Debt/Equity Fund [Member]
|
||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Fair Value, Less than 12 Months | 7,277 | |
| Gross Unrealized Losses, Less than 12 Months | (324) | |
| Fair Value, Total | 7,277 | |
| Gross Unrealized Losses, Total | (324) | |
|
Real Estate Securities [Member]
|
||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Fair Value, Less than 12 Months | ||
| Gross Unrealized Losses, Less than 12 Months | ||
| Fair Value, 12 Months or Greater | 6,836 | 3,049 |
| Gross Unrealized Losses, 12 Months or Greater | (2,826) | (3,158) |
| Fair Value, Total | 6,836 | 3,049 |
| Gross Unrealized Losses, Total | (2,826) | (3,158) |
|
Core Bonds [Member]
|
||
| Schedule of Available-for-sale Securities [Line Items] | ||
| Fair Value, Less than 12 Months | 31,906 | |
| Gross Unrealized Losses, Less than 12 Months | (148) | |
| Fair Value, 12 Months or Greater | ||
| Gross Unrealized Losses, 12 Months or Greater | ||
| Fair Value, Total | 31,906 | |
| Gross Unrealized Losses, Total | $ (148) |
| X | ||||||||||
|
- Definition
This item represents the excess of amortized cost basis over fair value of securities that have been in a loss position for twelve months or longer for those securities which are categorized neither as held-to-maturity nor trading securities. No definition available.
|
| X | ||||||||||
|
- Definition
This item represents the excess of amortized cost basis over fair value of securities in a loss position and which are categorized neither as held-to-maturity nor trading securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
This item represents the excess of amortized cost basis over fair value of securities that have been in a loss position for less than twelve months for those securities which are categorized neither as held-to-maturity nor trading securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
|
Rate Matters And Regulation (Details) (USD $)
|
0 Months Ended | 1 Months Ended | 0 Months Ended | 1 Months Ended | 9 Months Ended | |
|---|---|---|---|---|---|---|
|
Jun. 01, 2011
|
Aug. 19, 2011
|
Aug. 25, 2011
|
Apr. 11, 2011
|
Feb. 23, 2011
|
Sep. 30, 2011
|
|
| Rate Matters And Regulation [Abstract] | ||||||
| Ownership interest | 50.00% | |||||
| Environmental upgrades determined by using ratemaking principles | $ 1,200,000,000 | $ 1,200,000,000 | $ 1,200,000,000 | |||
| Expected increase to annual retail revenues | 10,400,000 | 90,800,000 | 17,400,000 | |||
| Expected increase to annual transmission revenues | 15,900,000 | |||||
| Environmental costs | $ 600,000,000 | $ 600,000,000 | ||||
| X | ||||||||||
|
- Definition
The proportionate share of interest (percent) in a jointly owned utility plant. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The estimated increase in a public utility's annual retail revenues as a result of rate proceedings. No definition available.
|
| X | ||||||||||
|
- Definition
The estimated increase in a public utility's annual transmission revenues as a result of rate proceedings. No definition available.
|
| X | ||||||||||
|
- Definition
The total amount of proposed environmental upgrades at a jointly owned utility plant. No definition available.
|
| X | ||||||||||
|
- Definition
Entity's share of the total amount of proposed environmental upgrades at a jointly owned utility plant. No definition available.
|
|
Short-Term Debt (Details) (USD $)
In Millions, unless otherwise specified |
0 Months Ended | 1 Months Ended | ||||
|---|---|---|---|---|---|---|
|
Sep. 29, 2011
years
|
Sep. 29, 2011
|
Feb. 18, 2011
years
|
Feb. 18, 2011
|
Sep. 30, 2011
|
Dec. 31, 2010
|
|
| Short-Term Debt [Abstract] | ||||||
| Secured revolving credit facility | $ 730.0 | $ 730.0 | $ 270.0 | $ 270.0 | $ 730.0 | |
| Line of credit facility expiration date | September 29, 2016 | February 18, 2015 | ||||
| Expected extended amount for line of credit | 1,000.0 | 400.0 | ||||
| Expected number of years for extending line of credit facility | 2 | 2 | ||||
| Secured revolving credit facility borrowed | 391.9 | 226.7 | ||||
| Issued letters of credit | $ 12.8 | $ 21.5 | ||||
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. No definition available.
|
| X | ||||||||||
|
- Definition
Amount borrowed under the credit facility as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Reflects when the credit facility terminates, which may be presented in a variety of ways (year, month and year, day, month and year, quarter). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Expected Number of Years for Extending Line of Credit Facility No definition available.
|
| X | ||||||||||
|
- Definition
The potential maximum aggregate borrowings available under the credit facility if option to increase is exercised. No definition available.
|
|
Taxes (Details) (USD $)
|
3 Months Ended | 9 Months Ended | 12 Months Ended | 3 Months Ended | |||
|---|---|---|---|---|---|---|---|
|
Sep. 30, 2011
|
Sep. 30, 2010
|
Sep. 30, 2011
|
Sep. 30, 2010
|
Dec. 31, 2010
|
Jun. 30, 2011
Minimum [Member]
years
|
Jun. 30, 2011
Maximum [Member]
years
|
|
| Taxes [Line Items] | |||||||
| Income tax expense | $ 61,700,000 | $ 51,802,000 | $ 94,812,000 | $ 86,780,000 | |||
| Effective income tax rate | 31.00% | 31.00% | 31.00% | 30.00% | |||
| Valuation allowance | 51,900,000 | ||||||
| Investment tax credits | 116,200,000 | ||||||
| Tax credit carryforward period | 10 | 16 | |||||
| Unrecognized income tax benefits | 4,300,000 | 4,300,000 | 1,900,000 | ||||
| Penalties accrued | 0 | 0 | 0 | ||||
| Accrued interest related to unrecognized income tax benefits | 400,000 | 400,000 | 400,000 | ||||
| Taxes other than income taxes | $ 3,600,000 | $ 3,600,000 | |||||
| X | ||||||||||
|
- Definition
A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of estimated penalties accrued as of the balance sheet date arising from income tax examinations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
This element represents the amount of interest expense accrued as of the date of the statement of financial position for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of the valuation allowance recorded as of the balance sheet date pertaining to the specified deferred tax asset for which an assessment was made that it is more likely than not that all or a portion of such deferred tax asset will not be realized through related deductions on future tax returns. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount recorded for probable assessments of taxes other than income taxes. No definition available.
|
| X | ||||||||||
|
- Definition
Tax Credit Carryforward Period No definition available.
|
| X | ||||||||||
|
- Details
|
|
Commitments And Contingencies (Details) (USD $)
|
1 Months Ended | 0 Months Ended | 1 Months Ended | 9 Months Ended |
|---|---|---|---|---|
|
Aug. 19, 2011
|
May 09, 2011
years
mW
|
Feb. 23, 2011
|
Sep. 30, 2011
mW
|
|
| Commitments And Contingencies [Line Items] | ||||
| Preliminary estimate of the cost of selective catalytic reduction (SCR) | $ 240,000,000 | |||
| Investment in environmental mitigation projects | 5,000,000 | |||
| Maturity of investment in mitigation projects (years) | 6 | |||
| Investment in environmental mitigation projects owned by third party | 1,000,000 | |||
| Paid towards civil penalty | 3,000,000 | |||
| Number of sites shared for remediation liability | 5 | |||
| Remediation liability | 3,800,000 | |||
| Capacity of wind generation facilities, megawatts | 370 | 300 | ||
| Supply agreement duration, years | 20 | |||
| Environmental costs | 600,000,000 | 600,000,000 | ||
| Proposed Environmental Upgrades Jointly Owned Utility Plant | $ 1,200,000,000 | $ 1,200,000,000 | $ 1,200,000,000 | |
|
2011 Through 2015 Generation Capacity Peak Demand [Member]
|
||||
| Commitments And Contingencies [Line Items] | ||||
| Renewable energy generation capacity, percentage | 10.00% | |||
|
2016 Through 2019 Generation Capacity Peak Demand [Member]
|
||||
| Commitments And Contingencies [Line Items] | ||||
| Renewable energy generation capacity, percentage | 15.00% | |||
|
2020 And Thereafter Generation Capacity Peak Demand [Member]
|
||||
| Commitments And Contingencies [Line Items] | ||||
| Renewable energy generation capacity, percentage | 20.00% | |||
|
Preliminary Unjust Profits [Member]
|
||||
| Commitments And Contingencies [Line Items] | ||||
| Unjust profits through alleged activities | 14.3 | |||
|
Revised Unjust Profits [Member]
|
||||
| Commitments And Contingencies [Line Items] | ||||
| Unjust profits through alleged activities | 3.0 | |||
|
Alleged Transmission Service Costs [Member]
|
||||
| Commitments And Contingencies [Line Items] | ||||
| Unjust profits through alleged activities | 3.2 | |||
|
Potential GHGE Missions Restrictions 1 [Member]
|
||||
| Commitments And Contingencies [Line Items] | ||||
| GHG emission | 75,000 | |||
|
Potential GHGE Missions Restrictions 2 [Member]
|
||||
| Commitments And Contingencies [Line Items] | ||||
| GHG emission | 100,000 |
| X | ||||||||||
|
- Definition
Presents an assertion of a fact by a plaintiff in a pleading or complaint, which the plaintiff claims it will prove upon presentation of evidence at the proceeding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Capacity Of Wind Generation Facilities No definition available.
|
| X | ||||||||||
|
- Definition
The civil penalty paid by an entity as part of a lawsuit settlement. No definition available.
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The estimated cost to install environmental equipment on a power plant. No definition available.
|
| X | ||||||||||
|
- Definition
GHG Emission No definition available.
|
| X | ||||||||||
|
- Definition
Investment in Environmental Mitigation Projects No definition available.
|
| X | ||||||||||
|
- Definition
Investment in Environmental Mitigation Projects Owned by Third Party No definition available.
|
| X | ||||||||||
|
- Definition
Maturity of investment in mitigation projects No definition available.
|
| X | ||||||||||
|
- Definition
The entity's maximum environmental remediation liability related to former assets. No definition available.
|
| X | ||||||||||
|
- Definition
Number Of Sites Shared For Remediation Liability No definition available.
|
| X | ||||||||||
|
- Definition
The total amount of proposed environmental upgrades at a jointly owned utility plant. No definition available.
|
| X | ||||||||||
|
- Definition
Entity's share of the total amount of proposed environmental upgrades at a jointly owned utility plant. No definition available.
|
| X | ||||||||||
|
- Definition
Renewable Energy Generation Capacity No definition available.
|
| X | ||||||||||
|
- Definition
Supply Agreement Duration No definition available.
|
|
Legal Proceedings (Details) (USD $)
In Millions, unless otherwise specified |
1 Months Ended | 9 Months Ended | 12 Months Ended |
|---|---|---|---|
|
May 31, 2011
|
Sep. 30, 2011
|
Dec. 31, 2010
|
|
| Legal Proceedings [Abstract] | |||
| Employee related accrued liabilities | $ 80.6 | ||
| Legal fees and expenses | 8.3 | ||
| Settlements of employee related accrued liabilities | 21.0 | ||
| Settlements of legal fees and expenses | 5.3 | 3.1 | |
| Settlements of employee related contractual obligation and other claims | 36.0 | ||
| Reversal of previously accrued liabilities | $ 22.0 |
| X | ||||||||||
|
- Definition
The amount of compensation accrued for a former officer of the company to be settled through arbitration proceedings. No definition available.
|
| X | ||||||||||
|
- Definition
The amount of legal fees and expenses accrued for a former officer of the company to be settled through arbitration proceedings. No definition available.
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Reversal of previously accrued liabilities. No definition available.
|
| X | ||||||||||
|
- Definition
Settlements Of Accrued Liability To Former Officer Compensation No definition available.
|
| X | ||||||||||
|
- Definition
Settlements Of Accrued Liability To Former Officer Legal Fees And Expenses No definition available.
|
| X | ||||||||||
|
- Definition
Settlements Of Contractual Obligation and Other Claims To Former Officer Compensation No definition available.
|
|
Interim Pension And Post-Retirement Benefit Disclosure (Net Periodic Costs For Pension And Post-Retirement Benefit Plans) (Details) (USD $)
|
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
|
Sep. 30, 2011
|
Sep. 30, 2010
|
Sep. 30, 2011
|
Sep. 30, 2010
|
|
| Defined Benefit Plan Disclosure [Line Items] | ||||
| Contribution to pension trust | $ 50,000,000 | $ 22,400,000 | ||
|
Pension Benefits [Member]
|
||||
| Defined Benefit Plan Disclosure [Line Items] | ||||
| Service cost | 4,019,000 | 3,481,000 | 12,057,000 | 10,444,000 |
| Interest cost | 9,958,000 | 9,848,000 | 29,873,000 | 29,544,000 |
| Expected return on plan assets | (7,772,000) | (9,596,000) | (23,316,000) | (28,788,000) |
| Prior service costs | 303,000 | 682,000 | 910,000 | 2,047,000 |
| Actuarial loss, net | 5,915,000 | 4,296,000 | 17,744,000 | 12,887,000 |
| Net periodic cost before regulatory adjustment | 12,423,000 | 8,711,000 | 37,268,000 | 26,134,000 |
| Regulatory adjustment | (5,640,000) | (3,119,000) | (16,907,000) | (9,357,000) |
| Net periodic cost | 6,783,000 | 5,592,000 | 20,361,000 | 16,777,000 |
|
Post-Retirement Benefits [Member]
|
||||
| Defined Benefit Plan Disclosure [Line Items] | ||||
| Service cost | 451,000 | 381,000 | 1,352,000 | 1,144,000 |
| Interest cost | 1,698,000 | 1,771,000 | 5,095,000 | 5,312,000 |
| Expected return on plan assets | (1,250,000) | (1,299,000) | (3,751,000) | (3,898,000) |
| Transition obligation, net | 978,000 | 978,000 | 2,934,000 | 2,934,000 |
| Prior service costs | 631,000 | 539,000 | 1,893,000 | 1,616,000 |
| Actuarial loss, net | 175,000 | 80,000 | 527,000 | 241,000 |
| Net periodic cost before regulatory adjustment | 2,683,000 | 2,450,000 | 8,050,000 | 7,349,000 |
| Regulatory adjustment | 308,000 | 444,000 | 934,000 | 1,331,000 |
| Net periodic cost | $ 2,991,000 | $ 2,894,000 | $ 8,984,000 | $ 8,680,000 |
| X | ||||||||||
|
- Definition
The amount of gains or losses recognized in net periodic benefit cost. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of the transition obligation or asset recognized in net periodic benefit cost. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of cash or cash equivalents contributed by the entity to fund its pension plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The total amount of net periodic benefit cost for defined benefit plans for the period prior to regulatory adjustment. No definition available.
|
| X | ||||||||||
|
- Definition
Defined Benefit Plan Regulatory Adjustment No definition available.
|
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Wolf Creek Interim Pension And Post-Retirement Benefit Disclosure (Net Periodic Costs For Pension And Post-Retirement Benefit Plans) (Details) (USD $)
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3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
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Sep. 30, 2011
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Sep. 30, 2010
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Sep. 30, 2011
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Sep. 30, 2010
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| Defined Benefit Plan Disclosure [Line Items] | ||||
| Contribution to pension trust | $ 50,000,000 | $ 22,400,000 | ||
| Subsidiary's interest, percentage | 47.00% | |||
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Wolf Creek [Member]
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| Defined Benefit Plan Disclosure [Line Items] | ||||
| Contribution to pension trust | 8,600,000 | 5,100,000 | ||
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KGE [Member]
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| Defined Benefit Plan Disclosure [Line Items] | ||||
| Subsidiary's interest, percentage | 47.00% | |||
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Pension Benefits [Member]
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| Defined Benefit Plan Disclosure [Line Items] | ||||
| Service cost | 4,019,000 | 3,481,000 | 12,057,000 | 10,444,000 |
| Interest cost | 9,958,000 | 9,848,000 | 29,873,000 | 29,544,000 |
| Expected return on plan assets | (7,772,000) | (9,596,000) | (23,316,000) | (28,788,000) |
| Prior service costs | 303,000 | 682,000 | 910,000 | 2,047,000 |
| Actuarial loss, net | 5,915,000 | 4,296,000 | 17,744,000 | 12,887,000 |
| Net periodic cost before regulatory adjustment | 12,423,000 | 8,711,000 | 37,268,000 | 26,134,000 |
| Regulatory adjustment | (5,640,000) | (3,119,000) | (16,907,000) | (9,357,000) |
| Net periodic cost | 6,783,000 | 5,592,000 | 20,361,000 | 16,777,000 |
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Pension Benefits [Member] | Wolf Creek [Member]
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| Defined Benefit Plan Disclosure [Line Items] | ||||
| Service cost | 1,239,000 | 1,036,000 | 3,718,000 | 3,108,000 |
| Interest cost | 1,843,000 | 1,735,000 | 5,527,000 | 5,206,000 |
| Expected return on plan assets | (1,476,000) | (1,363,000) | (4,429,000) | (4,090,000) |
| Transition obligation, net | 13,000 | 14,000 | 39,000 | 42,000 |
| Prior service costs | 4,000 | 7,000 | 12,000 | 22,000 |
| Actuarial loss, net | 896,000 | 659,000 | 2,689,000 | 1,976,000 |
| Net periodic cost before regulatory adjustment | 2,519,000 | 2,088,000 | 7,556,000 | 6,264,000 |
| Regulatory adjustment | (660,000) | (394,000) | (1,980,000) | (1,182,000) |
| Net periodic cost | 1,859,000 | 1,694,000 | 5,576,000 | 5,082,000 |
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Post-Retirement Benefits [Member]
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| Defined Benefit Plan Disclosure [Line Items] | ||||
| Service cost | 451,000 | 381,000 | 1,352,000 | 1,144,000 |
| Interest cost | 1,698,000 | 1,771,000 | 5,095,000 | 5,312,000 |
| Expected return on plan assets | (1,250,000) | (1,299,000) | (3,751,000) | (3,898,000) |
| Transition obligation, net | 978,000 | 978,000 | 2,934,000 | 2,934,000 |
| Prior service costs | 631,000 | 539,000 | 1,893,000 | 1,616,000 |
| Actuarial loss, net | 175,000 | 80,000 | 527,000 | 241,000 |
| Net periodic cost before regulatory adjustment | 2,683,000 | 2,450,000 | 8,050,000 | 7,349,000 |
| Regulatory adjustment | 308,000 | 444,000 | 934,000 | 1,331,000 |
| Net periodic cost | 2,991,000 | 2,894,000 | 8,984,000 | 8,680,000 |
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Post-Retirement Benefits [Member] | Wolf Creek [Member]
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| Defined Benefit Plan Disclosure [Line Items] | ||||
| Service cost | 41,000 | 45,000 | 124,000 | 134,000 |
| Interest cost | 115,000 | 130,000 | 344,000 | 390,000 |
| Transition obligation, net | 14,000 | 14,000 | 43,000 | 43,000 |
| Actuarial loss, net | 57,000 | 69,000 | 171,000 | 207,000 |
| Net periodic cost before regulatory adjustment | 227,000 | 258,000 | 682,000 | 774,000 |
| Net periodic cost | $ 227,000 | $ 258,000 | $ 682,000 | $ 774,000 |
| X | ||||||||||
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- Definition
The amount of gains or losses recognized in net periodic benefit cost. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount of the transition obligation or asset recognized in net periodic benefit cost. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount of cash or cash equivalents contributed by the entity to fund its pension plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The total amount of net periodic benefit cost for defined benefit plans for the period prior to regulatory adjustment. No definition available.
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| X | ||||||||||
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- Definition
Defined Benefit Plan Regulatory Adjustment No definition available.
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| X | ||||||||||
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- Definition
Subsidiary's interest in defined benefit plans. No definition available.
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Common Stock (Details) (USD $)
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9 Months Ended | ||
|---|---|---|---|
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Sep. 30, 2011
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Sep. 30, 2010
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Dec. 31, 2010
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| Common Stock [Line Items] | |||
| Common stock, authorized | 275,000,000 | 150,000,000 | |
| Common stock, issued | 117,083,763 | 112,128,068 | |
| Proceeds of common stock sales | $ 96,508,000 | $ 28,299,000 | |
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Forward Sale Agreement Entered In April 2010 [Member]
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| Common Stock [Line Items] | |||
| Common stock, issued | 4,200,000 | ||
| Proceeds of common stock sales | 91,900,000 | ||
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Forward Sale Agreement Entered In November 2010 [Member]
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| Common Stock [Line Items] | |||
| Common stock shares sold | 8,500,000 | ||
| Aggregate proceeds of forward transactions | $ 197,400,000 | ||
| Average forward price of shares | $ 23.28 | ||
| X | ||||||||||
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- Definition
The maximum number of common shares permitted to be issued by an entity's charter and bylaws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The per share price of the Company's stock at which the contract holder of the freestanding contract has the right to purchase or sell the Company's stock at a future date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The cash inflow from the additional capital contribution to the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
The estimated proceeds the entity would receive upon settlement of outstanding forward equity sale transactions. No definition available.
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| X | ||||||||||
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- Definition
The number of shares of common stock remaining to be settled under a forward equity sale agreement. No definition available.
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Variable Interest Entities (Narrative) (Details)
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0 Months Ended | 9 Months Ended |
|---|---|---|
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Apr. 28, 2011
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Sep. 30, 2011
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| Variable Interest Entity [Line Items] | ||
| Agreement expiration date | May 2039 | May 2013 and November 2014 |
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Jeffrey Energy Center [Member]
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| Variable Interest Entity [Line Items] | ||
| Percentage of lease holding interest | 8.00% | |
| Agreement expiration date | January 2019 | |
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La Cygne Generating Station [Member]
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| Variable Interest Entity [Line Items] | ||
| Percentage of lease holding interest | 50.00% | |
| Agreement expiration date | September 2029 |
| X | ||||||||||
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- Definition
The date upon which a lease or a group of leases is set to expire. No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
The percentage of an asset held by a variable interest entity that is consolidated by the entity. No definition available.
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Variable Interest Entities (Assets And Liabilities In Relation To VIEs) (Details) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2011
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Dec. 31, 2010
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|---|---|---|---|---|---|---|---|---|
| Variable Interest Entity [Line Items] | ||||||||
| Property, plant and equipment of variable interest entities, net | $ 6,281,623 | $ 5,964,439 | ||||||
| Current maturities of long-term debt of variable interest entities | 61 | |||||||
| Accrued interest | 68,188 | 77,771 | ||||||
| Long-term debt of variable interest entities, net | 2,490,972 | 2,490,871 | ||||||
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Variable Interest Entity, Primary Beneficiary [Member]
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| Variable Interest Entity [Line Items] | ||||||||
| Property, plant and equipment of variable interest entities, net | 336,373 | 345,037 | ||||||
| Regulatory assets | 4,690 | [1] | 3,963 | [1] | ||||
| Current maturities of long-term debt of variable interest entities | 28,091 | 30,155 | ||||||
| Accrued interest | 508 | [2] | 5,064 | [2] | ||||
| Long-term debt of variable interest entities, net | $ 250,632 | $ 278,162 | ||||||
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| X | ||||||||||
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- Definition
Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Total of the portions of the carrying amounts as of the balance sheet date of long-term debt, which may include notes payable, bonds payable, debentures, mortgage loans, and commercial paper, which are scheduled to be repaid within one year or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year (current maturities) or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount for the individual regulatory asset as itemized in a table of regulatory assets as of the end of the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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Leases (Details) (USD $)
In Millions, unless otherwise specified |
0 Months Ended | 9 Months Ended | |
|---|---|---|---|
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Apr. 28, 2011
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Sep. 30, 2011
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Jun. 30, 2011
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| Leases [Line Items] | |||
| Lease Expiration Date | May 2039 | May 2013 and November 2014 | |
| Capital lease | $ 40.0 | ||
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Minimum [Member] | Vehicles [Member]
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| Leases [Line Items] | |||
| Lease term in years | 2 | ||
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Minimum [Member] | Computer Equipment [Member]
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| Leases [Line Items] | |||
| Lease term in years | 4 | ||
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Maximum [Member] | Vehicles [Member]
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| Leases [Line Items] | |||
| Lease term in years | 7 | ||
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Maximum [Member] | Computer Equipment [Member]
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| Leases [Line Items] | |||
| Lease term in years | 5 |
| X | ||||||||||
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- Definition
Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The date upon which a lease or a group of leases is set to expire. No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Lease Term No definition available.
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Leases (Assets Recorded Under Capital Leases) (Details) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2011
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Dec. 31, 2010
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|---|---|---|
| Leases [Line Items] | ||
| Accumulated amortization | $ (6,198) | $ (8,744) |
| Total capital leases | 50,479 | 9,311 |
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Vehicles [Member]
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| Leases [Line Items] | ||
| Capital leased assets gross | 14,879 | 12,504 |
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Computer Equipment And Software [Member]
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| Leases [Line Items] | ||
| Capital leased assets gross | 1,750 | 5,551 |
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Power Supply Agreement [Member]
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| Leases [Line Items] | ||
| Capital leased assets gross | $ 40,048 |
| X | ||||||||||
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- Definition
Property, plant, or equipment held under lease agreements classified as an asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The total gross amount less the charge for the use of the long-lived depreciable assets subject to a lease meeting the criteria for capitalization. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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Leases (Minimum Annual Rental Payments) (Details) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2011
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Dec. 31, 2010
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|---|---|---|
| Leases [Abstract] | ||
| 2011 | $ 1,479 | $ 2,110 |
| 2012 | 5,437 | 2,213 |
| 2013 | 5,620 | 1,908 |
| 2014 | 5,209 | 1,792 |
| 2015 | 4,808 | 1,391 |
| Thereafter | 72,212 | 1,157 |
| Total future commitments | 94,765 | 10,571 |
| Amounts representing imputed interest | (44,286) | (1,260) |
| Present value of net minimum lease payments under capital leases | 50,479 | 9,311 |
| Less: current portion | 2,607 | 1,797 |
| Total long-term obligation under capital leases | $ 47,872 | $ 7,514 |
| X | ||||||||||
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- Definition
Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid within one year (or one operating cycle, if longer) of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid more than one year (or one operating cycle, if longer) after the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The total of contractually required rental payments on leases meeting the criteria for capitalization. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Contractually required rental payments on leases meeting the criteria for capitalization, due within one year of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Contractually required rental payments on leases meeting the criteria for capitalization, due within the fifth year from the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Contractually required rental payments on leases meeting the criteria for capitalization, due within the fourth year from the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Contractually required rental payments on leases meeting the criteria for capitalization, due within the third year from the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Contractually required rental payments on leases meeting the criteria for capitalization, due within the second year from the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Contractually required rental payments due on leases meeting the criteria for capitalization, after the fifth year from the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount necessary to reduce net minimum lease payments to present value calculated at the lesser of the interest rate implicit in the lease (if known) or the entity's incremental borrowing rate (as defined) at inception of the lease. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The discounted value of future cash flows under leases meeting the criteria for capitalization. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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