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Annual transmissions revenue estimated amount of increase (decrease) over prior year Public Utilities Estimated Annual Transmissions Revenue Increase (Decrease) Over Prior Year Amount Public utilities, estimated annual transmissions revenue amount of increase (decrease) over prior year RSU With Performance Measures Restricted Stock Units With Performance Measures [Member] Restricted Stock Units With Performance Measures [Member] Retirement Benefits [Abstract] Retirement Benefits [Abstract] Transmission Congestion Rights [Member] Transmission Congestion Rights [Member] Financial contracts acquired as part of the Southwest Power Pool's Integrated Marketplace that can be used to hedge against congestion costs and protect load prices. 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Property, plant and equipment additions Non Cash Property Plant And Equipment Additions, Gross Non-cash property, plant and equipment additions, Gross Entity Public Float Entity Public Float Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Refund percent on earnings over approved return on equity Public Utilities, Refund Percent On Earnings Over Approved Return On Equity Public Utilities, Refund Percent On Earnings Over Approved Return On Equity Non-cash financing transactions: Other Noncash Investing and Financing Items [Abstract] Officer compensation limitation EffectiveIncomeTaxRateReconciliationOfficerCompensationLimitation Officer compensation limitation Derivative, by Nature [Axis] Derivative Instrument [Axis] Derivative Instrument [Axis] Long-term debt gross Long-term debt gross Long-Term Debt, Gross All Trading Arrangements All Trading Arrangements [Member] Receivables Billing Status [Domain] Receivables Billing Status [Domain] All Adjustments to Compensation All Adjustments to Compensation [Member] Other Other Trust Assets [Member] Other assets within the trust fund. Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent Compensation Amount Outstanding Recovery Compensation Amount Repayment of term loan facility Repayment of term loan facility The cash outflow for a term loan borrowing having a initial term of repayment within one year. Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Table] Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Table] Transmission line electrical potential Transmission Line Electrical Potential Transmission Line Electrical Potential Credit loss expense Accounts Receivable, Credit Loss Expense (Reversal) Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] SHORT-TERM BORROWINGS AND SHORT-TERM BANK LINES OF CREDIT Short-Term Debt [Text Block] Derivative Asset Derivative Asset Issuance of restricted common stock Stock Issued During Period, Value, Restricted Stock Award, Gross Deferred Income Tax Expense (Benefit), Total Deferred Income Tax Expense (Benefit) Derivative, Fair Value, Amount Offset Against Collateral, Net [Abstract] Derivative, Fair Value, Amount Offset Against Collateral, Net [Abstract] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Accounts receivable pledged as collateral Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount International Geographic Distribution, Foreign [Member] Evergy Missouri West Other Proceedings EvergyMissouriWestOtherProceedings [Member] Evergy Missouri West Other Proceedings Beginning balance January 1 Ending balance September 30 Accounts Receivable, Allowance for Credit Loss Evergy, Inc. Evergy Evergy [Member] Evergy [Member] Other income Other Nonoperating Income Taxes other than income tax Taxes, Miscellaneous Pollution Control Bonds Pollution Control Bonds [Member] Pollution Control Bonds [Member] Document Period End Date Document Period End Date Adoption Date Trading Arrangement Adoption Date Basis of Presentation Basis of Presentation and Significant Accounting Policies [Text Block] Investment in corporate-owned life insurance Investment in corporate-owned life insurance Payment to Acquire Life Insurance Policy, Investing Activities Loss Contingencies by Nature of Contingency [Axis] Loss Contingency Nature [Axis] Income tax expense Income Tax Expense (Benefit), Total Income Tax Expense (Benefit) Write-offs Accounts Receivable, Allowance for Credit Loss, Writeoff Income Tax Receivable Income Tax Receivable [Member] Income Tax Receivable [Member] FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] Amounts reclassified from accumulated other comprehensive loss Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Federal Energy Regulatory Commission Federal Energy Regulatory Commission [Member] Federal Energy Regulatory Commission [Member] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Estimated refund on earnings over approved return on equity PublicUtilitiesEstimatedRefundOnEarningsOverApprovedReturnOnEquity Public Utilities Estimated Refund On Earnings Over Approved Return On Equity Offsetting Liabilities [Table] Offsetting Liabilities [Table] Recognized net actuarial (gain) loss Defined Benefit Plan, Amortization of Gain (Loss) Borrowings against cash surrender value of corporate-owned life insurance Proceeds From Borrowings Against Corporate Owned Life Insurance Proceeds From Borrowings Against Corporate Owned Life Insurance Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value COMPREHENSIVE INCOME Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Investment Tax Credits InvestmentTaxCredits [Abstract] Investment Tax Credits Credit Facility [Domain] Credit Facility [Domain] SPP network transmission costs SPPNetworkTransmissionCosts Cost incurred for SPP transmission costs Jointly Owned Utility Plant [Domain] Jointly Owned Utility Plant [Domain] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] 2024 Natural Gas Plant Purchase 2024NaturalGasPlantPurchase [Member] 2024 Natural Gas Plant Purchase Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Public Utilities approved rate increase decrease amount not including certain open items PublicUtilitiesApprovedRateIncreaseDecreaseAmountNotIncludingCertainOpenItems Public Utilities Approved Rate Increase Decrease Amount Not Including Certain Open Items Regulatory Proceedings [Table] Public Utilities General Disclosures [Table] Interest Rate Contract [Member] Interest Rate Contract [Member] Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Right-of-use assets obtained in exchange for new finance lease liabilities Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Customer accounts receivable Trade Accounts Receivable [Member] Regulated Operations [Abstract] Regulated Operations [Abstract] REVENUE Revenue from Contract with Customer [Text Block] Sibley Unit 3 impairment loss Sibley Unit 3 impairment loss and other regulatory disallowances Sibley Unit 3 impairment loss and other regulatory disallowances Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Document Annual Report Document Annual Report Nuclear fuel, net Nuclear Fuel [Member] Cost of investment in renewable generation, net of cash acquired CostOfInvestmentInRenewableGenerationNetOfCashAcquired Cost of investment in renewable generation, net of cash acquired Equity in earnings of equity method investees, net of income taxes Equity in earnings of equity method investees, net of income taxes Income (Loss) from Equity Method Investments Cover [Abstract] Cover [Abstract] Total self-insured health plan trust Self Insured Health Plan Trust Fair Value Disclosure The fair value of investments held in a trust for KCP&L's self-insurance health plan. Fair Value, Measurements, Recurring Fair Value, Recurring [Member] Cash dividends paid Payments of Dividends Other Other Liabilities, Noncurrent Supplemental Cash Flow Information Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Percent Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Percent Derivative Instruments Not Designated as Hedging Instruments [Abstract] Derivative Instruments Not Designated as Hedging Instruments [Abstract] Cash Flow Hedging [Member] Cash Flow Hedging [Member] Asset Acquisition, Consideration Transferred Asset Acquisition, Consideration Transferred Plant to be Retired, Net Plant Retirement and Abandonment, Policy [Policy Text Block] Foreign governments Debt Security, Government, Non-US [Member] NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Secured Debt Secured Debt [Member] Equity Component [Domain] Equity Component [Domain] Offsetting Assets [Table Text Block] Offsetting Assets [Table Text Block] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Net gain arising during period, net of tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax Entity Current Reporting Status Entity Current Reporting Status Evergy Metro Evergy Metro Evergy Metro Evergy Metro Inc [Member] Evergy Metro Inc [Member] Offsetting Assets [Line Items] Offsetting Assets [Line Items] INCOME FROM OPERATIONS Operating Income (Loss) AOCI - Net gains (losses) on cash flow hedges AOCI Including Portion Attributable to Noncontrolling Interest [Member] Series Notes Due 2023 EM Senior Notes due 2023 EM [Member] 3.15% Series Senior Notes due 2023 EM [Member] Number of reporting units Number of Reporting Units Cash and cash equivalents Cash and Cash Equivalents [Member] Consolidated Entities [Domain] Consolidated Entities [Domain] Evergy Kansas Central Evergy Kansas Central Inc [Member] Utility operating in Kansas. Mortgage Bonds Due 2023 EKS MortgageBondsDue2023EKS [Member] Mortgage Bonds Due 2023 EKS [Member] NAV, extension term Fair Value, Investments, Entities That Calculate Net Asset Value Extension Term Fair Value, Investments, Entities that Calculate Net Asset Value, Extension Term Fair Value Estimate of Fair Value Measurement [Member] Derivative hedging activity Other Comprehensive Income (Loss), Net of Tax [Abstract] Amortization of net losses included in net periodic benefit costs, net of tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax Regulatory Asset [Axis] Regulatory Asset [Axis] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Line of credit Long-Term Line of Credit 2022 Oklahoma Wind Farm Purchase 2022OklahomaWindFarmPurchase [Member] 2022 Oklahoma Wind Farm Purchase EQUITY: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Billed Billed Revenues [Member] Net deferred income taxes and credits Deferred Income Taxes and Tax Credits Consolidated Entities [Axis] Consolidated Entities [Axis] Less: Net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Pay vs Performance Disclosure [Line Items] Entity Voluntary Filers Entity Voluntary Filers Statistical Measurement [Domain] Statistical Measurement [Domain] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Nuclear decommissioning trust - equity securities Decommissioning Trust Assets - Equity [Member] Decommissioning Trust Assets - Equity [Member] Derivative, Fair Value, Net [Abstract] Derivative, Fair Value, Net [Abstract] Derivative Liability, Subject to Master Netting Arrangement, after Offset and Deduction [Abstract] Derivative Liability, Subject to Master Netting Arrangement, after Offset and Deduction [Abstract] Other regulatory disallowances Other regulatory disallowances Other regulatory disallowances Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Offsetting Assets [Table] Offsetting Assets [Table] Credit Derivatives [Line Items] Credit Derivatives [Line Items] Cash Borrowings Cash Borrowings Revolving Credit Facility [Member] Variable Interest Entities Variable Interest Entity, Primary Beneficiary [Member] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Fuel inventory Energy Related Inventory, Coal Accounts payable Due to Related Party, Current Accounts Payable, Current Restatement Determination Date: Restatement Determination Date [Axis] Investment, Name [Axis] Investment, Name [Axis] Derivatives Not Designated as Hedging Instruments [Table Text Block] Derivatives Not Designated as Hedging Instruments [Table Text Block] Corporate bonds Corporate Debt Securities [Member] Changes in other liabilities Increase (Decrease) in Other Noncurrent Liabilities Total Other Income (Expense), Net Total Other Expense, Net Nonoperating Income (Expense) Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Commitments and Contingencies (Note 11) Commitments and Contingencies Increase in Wholesale Revenues Increase in Wholesale Revenues Increase in Wholesale Revenues Issuance of common stock Proceeds from Issuance of Common Stock Other Other Nonoperating Income (Expense), Other Other Nonoperating Income (Expense), Other Gain(Loss) Reclassified from Regulatory Account into Income Derivative Instruments Gain Loss Reclassified From Regulatory Account Into Income On Derivatives The income statement location of the net gain (loss) reclassified from a regulatory account into income on derivative instruments. VIE ownership percentage Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage Electric plant in service Electric Plant In Service [Member] Electric Plant In Service [Member] TAXES Income Tax Disclosure [Text Block] Futures contracts [Member] Future [Member] Proceeds from investment in corporate-owned life insurance Proceeds from investment in corporate-owned life insurance Proceeds from Life Insurance Policy Unrealized gains (losses) Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) Geographic Distribution [Domain] Geographic Distribution [Domain] Jointly Owned Utility Plant [Axis] Jointly Owned Utility Plant [Axis] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Missouri Public Service Commission MissouriPublicServiceCommission [Member] Information related to the Public Service Commission of the State of Missouri. Derivative Liability, Fair Value, Gross Liability Derivative Liability, Subject to Master Netting Arrangement, before Offset PEO Total Compensation Amount PEO Total Compensation Amount Compensation expense recognized APIC, Share-Based Payment Arrangement, Restricted Stock Unit, Increase for Cost Recognition Hedging Relationship [Axis] Hedging Relationship [Axis] TFR Refund TFRRevenuesForRefund [Member] TFRRevenuesForRefund Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Percentage of Bondable Property Allowed PercentageofBondablePropertyAllowed PercentageofBondablePropertyAllowed Schedule of Allocation of Plan Assets Schedule of Allocation of Plan Assets [Table Text Block] Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Level 3 Fair Value, Inputs, Level 3 [Member] Regulatory assets Regulatory Asset, Current Unamortized investment tax credits Accumulated Deferred Investment Tax Credit Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Long-term debt Long-Term Debt, Fair Value Net income attributable to Evergy, Inc. Net Income (Loss) Net Income (Loss) Total Current Liabilities Liabilities, Current Derivative, Name [Domain] Derivative Contract [Domain] Derivative Contract [Domain] Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] Schedule of Defined Benefit Plan, Plan with Projected Benefit Obligation in Excess of Plan Assets Defined Benefit Plan, Plan with Projected Benefit Obligation in Excess of Plan Assets [Table Text Block] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Company Selected Measure Name Company Selected Measure Name Accrued interest Interest Payable, Current LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Income Tax Contingency [Table] Income Tax Contingency [Table] Issuance of restricted common stock Dividend, Share-Based Payment Arrangement Deferral of revenues to regulatory liability for refund to customers for return on investment of retired Sibley Station DeferralOfRevenuesToRegulatoryLiabilityForRefundToCustomersForReturnOnInvestmentOfRetiredSibleyStation DeferralOfRevenuesToRegulatoryLiabilityForRefundToCustomersForRetiredSibleyStation Power commodity contract current PowerCommodityContractCurrent [Member] Power commodity contract current Credit Derivative, Maximum Exposure, After Master Netting and Collateral CreditDerivativeMaximumExposureAfterMasterNettingAndCollateral Credit Derivative, Maximum Exposure, After Master Netting And Collateral Name Measure Name Master Credit Facility Line of Credit Facility, Current Borrowing Capacity Name Forgone Recovery, Individual Name Operating and maintenance Utilities Operating Expense, Maintenance and Operations Goodwill Goodwill Increase of Natural Gas and Purchased Power Costs, Gross Increase of Natural Gas and Purchased Power Costs, Gross Increase of Natural Gas and Purchased Power Costs, Gross Collateralized note payable Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount Measurement Basis [Axis] Measurement Basis [Axis] Asset Acquisition [Domain] Asset Acquisition [Domain] Underlying Securities Award Underlying Securities Amount Length of Settlement Fair Value, Investments, Entities that Calculate Net Asset Value, Settlement Term Fair Value, Investments, Entities that Calculate Net Asset Value, Settlement Term Acquisition of Persimmon Creek, net of cash acquired PaymentsToAcquirePersimmonCreekWindFarm1LLCNetOfCashAcquired Payments to acquire Persimmon Creek Wind Farm 1 LLC, net of cash acquired Accounts receivable Increase (Decrease) in Accounts Receivable Fair Value Measurement [Domain] Fair Value Measurement [Domain] Evergy Metro, Inc., Subsidiary Subsidiaries [Member] Derivative Asset, Alternative [Abstract] Derivative Asset, Alternative [Abstract] Dividends declared on common stock (in dollars per share) Common Stock, Dividends, Per Share, Declared Warrant Warrant [Member] Property, plant and equipment, adjustment Property, Plant And Equipment, Adjustment Property, Plant And Equipment, Adjustment Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Income Statement Location [Axis] Income Statement Location [Axis] LineOfCreditFacilityClassifiedasLongTermDebt LineOfCreditFacilityClassifiedAsLongTermDebt Line Of Credit Facility Classified As Long Term Debt Pension and post-retirement liability Liability, Defined Benefit Plan, Noncurrent U.S. Agency US Government Corporations and Agencies Securities [Member] Add: effect of dilutive securities (in shares) Weighted Average Number of Shares Outstanding, Diluted, Adjustment Other Performance Measure, Amount Other Performance Measure, Amount Borrowings from mid July through mid November BorrowingsFromMidJulyThroughMidNovember [Member] Borrowings from mid July through mid November Letters of Credit Standby Letters of Credit [Member] CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities [Abstract] Fuel and purchased power FuelAndPurchasedPower Amount of operating expense for fuel and purchased power used by regulated operation Asset retirement obligations Asset Retirement Obligation, Current Income Taxes Payable Income Taxes Payable [Member] Income Taxes Payable [Member] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Income taxes receivable Income Taxes Receivable, Current Interest expense Interest Expense Increase of Natural Gas and Purchased Power Costs, Net Increase in Wholesale Revenues Increase of Natural Gas and Purchased Power Costs, Net Increase in Wholesale Revenues The amount of increase of Natural Gas and Purchased Power Costs, Net of the Increase in Wholesale Revenues. Trading Arrangement: Trading Arrangement [Axis] Natural gas commodity contract NaturalGasCommodityContract [Member] Natural gas commodity contract Amortization of nuclear fuel Amortization of Nuclear fuel The noncash expense, not otherwise specified in the taxonomy, charged against earnings in the period to allocate the cost of nuclear fuel over the operating cycle of the nuclear plant. Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Entity File Number Entity File Number FERC 2023 TFR Proceeding FERC2023TFRProceeding [Member] FERC 2023 TFR Proceeding NAV, number of funds making distributions Fair Value, Investments, Entities That Calculate Net Asset Value, Number Of Funds Making Distributions Fair Value, Investments, Entities that Calculate Net Asset Value, Number Of Funds Making Distributions Entity Shell Company Entity Shell Company Net money pool lending Payments for Advance to Affiliate Total electric retail Electric Utility Customer Class Total Electric Retail [Member] Total electric retail customer class from which revenues are generated by the regulated sale of electricity [Member] Restatement Determination Date Restatement Determination Date Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Regulatory Agency [Domain] Regulatory Agency [Domain] Beginning of period End of period Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Asset Class [Axis] Asset Class [Axis] Borrowings from mid November through mid July BorrowingsFromMidNovemberThroughMidJuly [Member] Borrowings from Mid November through Mid July Annual wind farm revenue rate increase (decrease), requested PublicUtilitiesRequestedRateIncreaseDecreaseAmountWindFarm PublicUtilitiesRequestedRateIncreaseDecreaseAmountWindFarm Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Common Shares Outstanding Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Common stock - shares issued (in shares) Common Stock, Shares, Issued Total Assets Assets, Fair Value Disclosure Dividends Payable [Line Items] Dividends Payable [Line Items] Other financing activities Proceeds from (Payments for) Other Financing Activities Power commodity contract PowerCommodityContract [Member] Power commodity contract Comprehensive Income, Net of Tax, Attributable to Parent, Total COMPREHENSIVE INCOME Comprehensive Income (Loss), Net of Tax, Attributable to Parent Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Percent Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Percent Schedule of Expected Benefit Payments Schedule of Expected Benefit Payments [Table Text Block] Payments for asset retirement obligations Payments For Asset Retirement Obligations Payments For Asset Retirement Obligations Type of Adoption [Domain] Accounting Standards Update [Domain] Schedule of Health Care Cost Trend Rates Schedule of Health Care Cost Trend Rates [Table Text Block] Entity Address, Address Line One Entity Address, Address Line One Long-Term debt fair value adjustment Long-TermDebtFairValueAdjustment [Member] Long-Term debt fair value adjustment recorded in association with the merger. Deferral of revenues to regulatory liability for refund to customers for COLI rate credits DeferralOfRevenuesToRegulatoryLiabilityForRefundToCustomersForCOLIRateCredits Deferral of revenues to regulatory liability for refund to customers for COLI rate credits Accounts, Notes, Loans and Financing Receivable by Receivable Type [Axis] Receivable Type [Axis] Ownership interest Subsidiary, Ownership Percentage, Parent Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration] Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration] Prior service cost Accumulated Defined Benefit Plans Adjustment, Net Prior Service Including Portion Attributable to Noncontrolling Interest [Member] Public Utilities, Recovery Mechanism Percent for Fuel Cost Public Utilities, Recovery Mechanism Percent for Fuel Cost Public Utilities, Recovery Mechanism Percent for Fuel Cost Accrued taxes Taxes Payable, Current Regulatory assets Regulatory Asset Subsequent Event Subsequent Event [Member] COLI Rate Credits for Refund COLIRateCreditsForRefund [Member] COLI Rate Credits for Refund Other Other Liabilities, Current Income Statement [Abstract] Income Statement [Abstract] Issuance of stock, net of issuance costs (in shares) Stock Issued During Period, Shares, New Issues Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Public Utilities, Approved Rate Increase Decrease, Amount, Wind Farm PublicUtilitiesApprovedRateIncreaseDecreaseAmountWindFarm Public utilities approved rate increase (decrease) amount wind farm Derivative Liability Derivative Liability Transmission delivery charge Transmission Delivery Charge [Member] Transmission Delivery Charge [Member] Schedule of Fair Value Recurring Gain (Loss) Included in Earnings Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Table Text Block] Other assets Other Assets, Current Lease liability Lessee, Lease, Liability Lessee, Lease, Liability Derivative, Credit Risk Related Contingent Features [Abstract] Derivative, Credit Risk Related Contingent Features [Abstract] Dividends Payable [Table] Dividends Payable [Table] Issuance of stock, net issuance costs Stock Issued During Period, Value, Dividend Reinvestment Plan And Share-Based Compensation Net Stock Issued During Period, Value, Dividend Reinvestment Plan And Share-Based Compensation Net Derivative, Net Liability Position, Aggregate Fair Value Derivative, Net Liability Position, Aggregate Fair Value Defined benefit pension plans Defined Benefit Pension Plans [Abstract] Defined Benefit Pension Plans [Abstract] Purchase of securities - trusts Payments to Acquire Investments to be Held in Decommissioning Trust Fund Total Shareholder Return Amount Total Shareholder Return Amount Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Non-cash investing transactions: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Fixed income funds Fixed Income Funds [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] FERC 2021 TFR Proceeding FERC 2021 TFR Proceeding [Member] FERC 2021 TFR Proceeding Schedule of Other Nonoperating Income (Expense) Schedule of Other Nonoperating Income (Expense) [Table Text Block] Retained earnings Retained Earnings (Accumulated Deficit) Issuance of restricted common stock (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross CURRENT ASSETS: Assets, Current [Abstract] Related party receivables Customer accounts receivable Due from Related Party, Current Accounts Receivable, before Allowance for Credit Loss, Current Entity Address, State or Province Entity Address, State or Province Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Lease asset Lessee, Lease, Asset Lessee, Lease, Asset Consolidated Entity Excluding Variable Interest Entities (VIE) Consolidated Entity, Excluding Consolidated VIE [Member] FIN 39 Derivative liability netting Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset CASH FLOWS FROM (USED IN) OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] Residential Electric Utility Customer Class Residential [Member] Residential customer class from which revenues are generated by the regulated sale of electricity [Member] Jointly Owned Electricity Generation Plant Iatan No 1 And 2 Jointly Owned Electricity Generation Plant Iatan No 1 And 2 [Member] Jointly Owned Electricity Generation Plant Iatan No 1 And 2 [Member] Defined benefit plan basis point change in discount rate DefinedBenefitPlanChangeInDiscountRate DefinedBenefitPlanChangeInDiscountRate Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset [Abstract] Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset [Abstract] Asset Class [Domain] Asset Class [Domain] Derivative Asset, Fair Value, Gross Asset Derivative Asset, Subject to Master Netting Arrangement, before Offset Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Class of Stock [Domain] Class of Stock [Domain] Customer [Domain] Customer [Domain] Schedule of Fuel Inventory and Supplies Schedule of Inventory, Current [Table Text Block] Effective Income Tax Rate Reconciliation, Percent, Total Effective Income Tax Rate Reconciliation, Percent Industrial steam and other Electric Utility Customer Class Industrial Steam [Member] Industrial steam customer class from which revenues are generated by the regulated sale of industrial steam to GMO's steam customers [Member] Asset Acquisition [Axis] Asset Acquisition [Axis] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] AEP Transmission Holding Company, LLC AEP Transmission Holding Company, LLC [Member] AEP Transmission Holding Company, LLC AOCI AOCI Attributable to Parent [Member] Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Notes payable and commercial paper Short-Term Bank Loans and Notes Payable Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Nuclear decommissioning trust - debt securities Decommissioning Trust Assets - Debt [Member] Decommissioning Trust Assets - Debt [Member] All Executive Categories All Executive Categories [Member] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Operating Expenses and Capital Costs Billed Operating Expenses And Capital Costs Billed [Member] Operating Expenses and Capital Costs Billed [Member] Number of segments Number of Reportable Segments BASIC AND DILUTED EARNINGS PER AVERAGE COMMON SHARE OUTSTANDING ATTRIBUTABLE TO EVERGY, INC. (see Note 1) Earnings Per Share [Abstract] Regulatory Asset [Domain] Regulatory Asset [Domain] Common stock Common Stock, Value, Issued NAV Fair Value Measured at Net Asset Value Per Share [Member] Collateral Already Posted, Aggregate Fair Value Collateral Already Posted, Aggregate Fair Value Senior Notes Senior Notes [Member] Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, Tax [Abstract] Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, Tax [Abstract] Amortization of deferred refueling outage Amortization Of Deferred Refueling Outage Costs Amortization Of Deferred Refueling Outage Costs Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] All Individuals All Individuals [Member] Entity Filer Category Entity Filer Category Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Statement [Table] Statement [Table] Current Fiscal Year End Date Current Fiscal Year End Date Commodity contract noncurrent CommodityContractNoncurrent [Member] Commodity contract noncurrent Other retail Electric Utility Customer Class Other Retail [Member] Other retail customer class from which revenues are generated by the regulated sale of electricity [Member] Schedule of Effective Income Tax Rate Reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Issuance of restricted common stock AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsIssuance Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Issuance PEO Name PEO Name Wolf Creek Jointly Owned Nuclear Power Plant [Member] Kansas Corporation Commission Kansas Corporation Commission [Member] Information related to the State Corporation Commission of the State of Kansas. La Cygne Station La Cygne Station [Member] La Cygne Station [Member] Core bond fund Core Bond Fund [Member] Core Bond Fund [Member] Revised estimated refund on earnings over approved return on equity RevisedPublicUtilitiesEstimatedRefundOnEarningsOverApprovedReturnOnEquity Revised public utilities estimated refund on earnings over approved return on equity Net loss arising during period Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax Regulatory Liability [Domain] Regulatory Liability [Domain] Public Utilities, Regulatory Proceeding [Axis] Public Utilities, Regulatory Proceeding [Axis] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Interest rate Interest rate Debt Instrument, Interest Rate, Stated Percentage Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Amortization of corporate-owned life insurance Amortization Of Corporate Owned Life Insurance Amortization Of Corporate Owned Life Insurance Total Evergy, Inc. Shareholders' Equity Equity, Attributable to Parent Collateralized short-term borrowings, net Collateralized short-term debt, net Proceeds From (Payments For) Issuance Of Collateralized Debt Net Proceeds From (Payments For) Issuance Of Collateralized Debt Net Summary Of Accounting Policies [Table] Summary Of Accounting Policies [Table] Summary Of Accounting Policies [Table] Repayment of borrowings against cash surrender value of corporate-owned life insurance Repayments Of Borrowings Against Corporate Owned Life Insurance Repayments Of Borrowings Against Corporate Owned Life Insurance Geographic Distribution [Axis] Geographic Distribution [Axis] Not Designated as Hedging Instrument [Member] Not Designated as Hedging Instrument [Member] State and local obligations US States and Political Subdivisions Debt Securities [Member] Hedging Designation [Domain] Hedging Designation [Domain] Level 2 Fair Value, Inputs, Level 2 [Member] Commodity contract current CommodityContractCurrent [Member] Commodity contract current Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table] Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table] Credit Derivative, Maximum Exposure, Undiscounted Credit Derivative, Maximum Exposure, Undiscounted Approved return on equity, percentage Public Utilities, Approved Return on Equity, Percentage Derivative Instruments, Gain (Loss) [Table Text Block] Derivative Instruments, Gain (Loss) [Table Text Block] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Available Borrowings Line of Credit Facility, Remaining Borrowing Capacity Non-cash compensation Share-Based Payment Arrangement, Noncash Expense Jeffrey Energy Center Jeffrey Energy Center [Member] Jeffrey Energy Center [Member] City Area Code City Area Code Ownership percentage Equity Method Investment, Ownership Percentage Document Fiscal Year Focus Document Fiscal Year Focus Fuel Costs [Member] Fuel Costs [Member] Fuel costs incurred that are directly related to goods produced and sold and services rendered during the reporting period. Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax Receivables [Abstract] Receivables [Abstract] Exercise Price Award Exercise Price Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Maximum amount of outstanding principal under receivables agreement Maximum Amount Of Outstanding Principal Under Receivables Agreement Maximum amount of outstanding principal under receivables agreement Dividends declared on common stock Dividends, Common Stock, Cash Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Total Liabilities Liabilities, Fair Value Disclosure NET INCOME Net income NET INCOME Net Income (Loss), Including Portion Attributable to Noncontrolling Interest EffectiveIncomeTaxRateReconciliationEffectOfRegulatoryTreatmentBookTaxDifferences EffectiveIncomeTaxRateReconciliationEffectOfRegulatoryTreatmentBookTaxDifferences Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to the effect of regulatory treatment of book and tax differences. Income taxes, net of refunds Income Taxes Paid, Net TOTAL LIABILITIES AND EQUITY Liabilities and Equity Other Other Assets, Noncurrent Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Ownership [Domain] Ownership [Domain] Changes In Uncertain Tax Positions, Net EffectiveIncomeTaxRateReconciliationChangesInUncertainTaxPositionsNet Effective Income Tax Rate Reconciliation, Changes In Uncertain Tax Positions, Net Total rabbi trust Rabbi Trust, Fair Value Disclosure Rabbi Trust, Fair Value Disclosure Number of customers served Number Of Customers Served Number Of Customers Served Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Ordered refund on earnings over approved return on equity OrderedPublicUtilitiesRefundOnEarningsOverApprovedReturnOnEquity Ordered public utilities refund on earnings over approved return on equity Other Other Revenue Revenue other than from contracts with customers. Arrangement Duration Trading Arrangement Duration Regulatory Liability [Axis] Regulatory Liability [Axis] Entity Address, City or Town Entity Address, City or Town Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Related Party [Member] Related Party [Member] Inventory, Current [Table] Inventory, Current [Table] ApproximateMWNameplateCapacity ApproximateMWNameplateCapacity Approximate MW Nameplate Capacity Gross amounts offset Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset EffectiveIncomeTaxRateReconciliationAFUDCEquity EffectiveIncomeTaxRateReconciliationAFUDCEquity Effective Income Tax Rate Reconciliation, AFUDC Equity Other receivables Other Receivables, Gross, Current Termination Date Trading Arrangement Termination Date Common stock - shares authorized (in shares) Common Stock, Shares Authorized Equity funds Other Equity Fund [Member] Other Equity Fund Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net Term Loan Facility Borrowings Short-Term Debt Adjustments to reconcile income to net cash from operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Related Party Transactions [Abstract] Related Party Transactions [Abstract] Derivative [Line Items] Derivative [Line Items] Award Timing Disclosures [Line Items] Dividends payable Dividends Payable Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Investment earnings Investment earnings (loss) Gain (Loss) on Investments 2021 Winter Weather Qualified Extraordinary Costs Securitization 2021WinterWeatherQualifiedExtraordinaryCostsSecuritization [Member] 2021 Winter Weather Qualified Extraordinary Costs Securitization Short-term Debt, Type [Axis] Short-Term Debt, Type [Axis] Prepaid expenses Prepaid Expense and Other Assets, Current Insider Trading Arrangements [Line Items] Regulatory Asset, Amortization Period Regulatory Asset, Amortization Period Combination debt/equity/other fund Debt Equity Other Fund [Member] Debt Equity Other Fund [Member] Net periodic benefit costs before regulatory adjustment and intercompany allocations Net Period Benefit Costs Before Regulatory Adjustment And Intercompany Allocations The total amount of net periodic benefit cost for defined benefit plans for the period before regulatory adjustment and intercompany allocations. 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. Related Party [Axis] Related Party, Type [Axis] 2021 MPSC Winter Weather Qualified Extraordinary Costs Securitization 2021MPSCWinterWeatherQualifiedExtraordinaryCostsSecuritization [Member] 2021 MPSC Winter Weather Qualified Extraordinary Costs Securitization Entity Registrant Name Entity Registrant Name Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Award Timing Method Award Timing Method [Text Block] Changes in other assets Increase (Decrease) in Other Operating Assets Option contracts [Member] Options Held [Member] Adjustment to Compensation, Amount Adjustment to Compensation Amount Other current liabilities Increase (Decrease) in Other Current Liabilities Schedule of Costs of Retirement Plans Schedule of Costs of Retirement Plans [Table Text Block] Noncontrolling Interests Equity, Attributable to Noncontrolling Interest Short-term debt, net Proceeds from (Repayments of) Short-Term Debt Offsetting Derivative Assets and Liabilities [Table Text Block] Offsetting Derivative Assets and Liabilities [Table Text Block] [Table Text Block] for Tabular disclosure of derivative assets and liabilities that are subject to offsetting, including master netting arrangements. [Table] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Schedule of Fair Value of Assets and Liabilities Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Retirements of long-term debt Retirements of long-term debt Repayments of Long-Term Debt AdditionalPrincipalFirstMortgageBondsAvailableToBeIssued AdditionalPrincipalFirstMortgageBondsAvailableToBeIssued Principal amount of additional first mortgage bonds available to be issued under th most restrictive mortgage provisions. Schedule of Fair Value Investments, Entities that Calculate NAV Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table Text Block] Entity Central Index Key Entity Central Index Key Dividends Payable, Date to be Paid Dividends Payable, Date to be Paid Sale of securities - trusts Proceeds from Decommissioning Trust Fund Assets Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Nuclear decommissioning trust fund Decommissioning Fund Investments Summary of Operating Loss Carryforwards Summary of Operating Loss Carryforwards [Table Text Block] Accrued compensation and benefits Employee-related Liabilities, Current Persimmon Creek costs recovery period PersimmonCreekCostsRecoveryPeriod Persimmon Creek Costs Recovery Period RECEIVABLES Loans Notes Trade And Other Receivables Disclosure And Transfers And Servicing Of Financial Asset [Text Block] Includes disclosure of claims held for amounts due a company. Examples include trade accounts receivables, notes receivables, loans receivables. Also provides the disclosures pertaining to a transferor's continuing involvement in financial assets that it has transferred in a securitization or asset-backed financing arrangements. Name Trading Arrangement, Individual Name Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Issuance of stock, net of issuance costs Stock Issued During Period, Value, New Issues Commercial Electric Utility Customer Class Commercial [Member] Commercial customer class from which revenues are generated by the regulated sale of electricity [Member] Regulatory liabilities Regulatory Liability, Current Total revenue from contracts with customers Revenue from Contract with Customer, Excluding Assessed Tax Entity [Domain] Entity [Domain] Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Amendment Flag Amendment Flag Supplies Energy Related Inventory, Supplies Energy Related Inventory, Supplies Legal Entity [Axis] Legal Entity [Axis] CASH, CASH EQUIVALENTS AND RESTRICTED CASH: Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect [Abstract] Asset retirement obligations Asset Retirement Obligations, Noncurrent Interest, net of amount capitalized Interest Paid, Excluding Capitalized Interest, Operating Activities Proceeds from term loan facility Proceeds from term loan facility The cash inflow from a term loan having initial term of repayment within one year. Assets Assets, Fair Value Disclosure [Abstract] Summary of Bad Debt Expense Impaired Financing Receivables [Table Text Block] Long-term debt, net Long-Term Debt, Excluding Current Maturities Related and Nonrelated Party Status [Domain] Related and Nonrelated Party Status [Domain] Diluted (in shares) Diluted average number of common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Offsetting Derivative Assets [Abstract] Offsetting Derivative Assets [Abstract] Additions to property, plant and equipment Payments to Acquire Property, Plant, and Equipment Company Selected Measure Amount Company Selected Measure Amount Natural gas commodity contract current NaturalGasCommodityContractCurrent [Member] Natural gas commodity contract current TOTAL ASSETS Assets Name Awards Close in Time to MNPI Disclosures, Individual Name Industrial Electric Utility Customer Class Industrial [Member] Industrial customer class from which revenues are generated by the regulated sale of electricity [Member] Stock compensation expense APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Derivative Liability, Alternative [Abstract] Derivative Liability, Alternative [Abstract] Allowance for equity funds used during construction Increase (Decrease) in Allowance for Equity Funds Used During Construction Non-NEOs Non-NEOs [Member] Rabbi trust: Rabbi trusts - equity securities Rabbi Trusts [Member] Rabbi Trusts [Member] Construction work in progress Construction in Progress [Member] Income Tax Contingency [Line Items] Income Tax Contingency [Line Items] Pension Benefits Pension Plan [Member] 2021 Winter Weather Qualified Carrying Costs Securitization 2021WinterWeatherQualifiedCarryingCostsSecuritization [Member] 2021 Winter Weather Qualified Carrying Costs Securitization CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities [Abstract] INCOME BEFORE INCOME TAXES Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Non-PEO NEO Non-PEO NEO [Member] FIN 39 Derivative asset netting Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset [Abstract] Adjustment to Compensation: Adjustment to Compensation [Axis] Debt Instrument [Line Items] Debt Instrument [Line Items] Commercial Paper Classified As Long Term Debt CommercialPaperClassifiedAsLongTermDebt [Member] Commercial paper classified as long term debt Accounts, Notes, Loans and Financing Receivable by Billing Status, Type [Axis] Billing Status, Type [Axis] Basic (in shares) Weighted average equivalent common shares outstanding - basic (in shares) Weighted Average Number of Shares Outstanding, Basic Net money pool lending Proceeds from Collection of Advance to Affiliate Schedule of Short-term Debt [Table] Schedule of Short-Term Debt [Table] FERC 2022 TFR Proceeding FERC2022TFRProceeding [Member] FERC 2022 TFR Proceeding Summary Of Accounting Policies [Line Items] Summary Of Accounting Policies [Line Items] [Line Items] for Summary Of Accounting Policies [Table] Other receivables, contracts with customers Other Receivables, Contracts With Customers The amount of other receivables resulting from contracts with customers. COMPREHENSIVE INCOME Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Transource Energy, LLC Transource Energy, LLC [Member] Transource Energy, LLC Related Party Transaction [Axis] Related Party Transaction [Axis] Regulatory assets Regulatory Asset, Noncurrent Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Statement [Line Items] Statement [Line Items] Fuel inventory and supplies Fuel inventory and supplies Energy Related Inventory Values of open positions for derivative instruments [Table Text Block] Schedule of Derivative Instruments [Table Text Block] Total InvestmentTaxCreditTotalNet Investment Tax Credit Total Net Non-controlling interests Noncontrolling Interest [Member]