U.S. Agency
US Government Corporations and Agencies Securities [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Evergy Kansas South Inc
Evergy Kansas South Inc [Member]
Evergy Kansas South Inc [Member]
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 AND RELATIONSHIPS
Related Party Transactions Disclosure [Text Block]
Retirements of long-term debt
Retirements of long-term debt
Repayments of Long-Term Debt
Nuclear liability insurance, owners nonnuclear property insurance, maximum
Nuclear Liability Insurance Owners Nonnuclear Property Insurance Maximum
Nuclear Liability Insurance Owners Nonnuclear Property Insurance Maximum
Other income
Other income, total
Other Nonoperating Income
Cover [Abstract]
Cover [Abstract]
NET CHANGE IN CASH AND CASH EQUIVALENTS
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect
Prairie Wind Transmission, LLC
Prairie Wind Transmission, LLC [Member]
Prairie Wind Transmission, LLC [Member]
Net money pool borrowings
Proceeds from (Repayments of) Short-Term Debt, Maturing in More than Three Months
Trading Symbol
Trading Symbol
Ownership percentage
Equity Method Investment, Ownership Percentage
COMPREHENSIVE INCOME
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Purchased Power Costs [Member]
Purchased Power Costs [Member]
Amount of operating expense for purchased power of regulated operation.
Corporate-owned life insurance policy benefit
CorporateOwnedLifeInsurancePolicyBenefit
Corporate owned life insurance policy benefit
Schedule of Fair Value Recurring Gain (Loss) Included in Earnings
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Table Text Block]
Emerging markets bond fund
Emerging Markets Bond Fund [Member]
Emerging Markets Bond Fund [Member]
Derivative Asset, Fair Value, Gross Asset
Derivative Asset, Subject to Master Netting Arrangement, before Offset
Dividends declared on common stock (in dollars per share)
Common Stock, Dividends, Per Share, Declared
Nuclear liability insurance, full limit of public liability
Nuclear Liability Insurance Full Limit Of Public Liability
Nuclear Liability Insurance Full Limit Of Public Liability
Summary of Related Tax Benefit Amounts
Summary of Tax Credit Carryforwards [Table Text Block]
Early-Stage Energy Solution Company
Early-Stage Energy Solution Company [Member]
Early-Stage Energy Solution Company
Receivables, net of allowance for credit losses of $12.7 and $15.7, respectively
Receivables, net of allowance for credit losses of $5.5 and $7.8, respectively
Allowance for credit losses
Accounts Receivable, Allowance for Credit Loss, Current
Billed
Billed Revenues [Member]
Debt Instrument, debt to capitalization ratio (no more than)
Debt Instrument, Covenant, Debt To Capitalization Ratio, Maximum
Debt Instrument, Covenant, Debt to Capitalization Ratio, Maximum
Cash equivalents
Cash Equivalents [Member]
Accounts receivable
Increase (Decrease) in Accounts Receivable
Earnings Per Share
Earnings Per Share, Policy [Policy Text Block]
Organization, Consolidation and Presentation of Financial Statements Disclosure
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
Fuel Inventory and Supplies
Inventory, Policy [Policy Text Block]
Hedging Relationship [Domain]
Hedging Relationship [Domain]
FAIR VALUE MEASUREMENTS
Fair Value Disclosures [Text Block]
Weighted Average Interest Rate on Short-Term Borrowings
Line of Credit Facility, Interest Rate at Period End
Other regulatory disallowances, EMW meters
PublicUtilitiesOtherRegulatoryDisallowances
Public utilities other regulatory disallowances
Investment, Name [Domain]
Investment, Name [Domain]
Senior Notes Series C due 2036 EMW
SeniorNotesSeriesCDue2036EMW [Member]
Senior Notes Series C Due 2036 EMW
Portion at Fair Value Measurement [Member]
Portion at Fair Value Measurement [Member]
Nuclear decommissioning trust:
Decommissioning Trust Assets [Member]
Decommissioning Trust Assets [Member]
Derivative Asset, Alternative [Abstract]
Derivative Asset, Alternative [Abstract]
Offsetting [Abstract]
Offsetting [Abstract]
Public Utilities, Approved Rate Increase (Decrease), Amount
Public Utilities, Approved Rate Increase (Decrease), Amount
Geographic Distribution [Axis]
Geographic Distribution [Axis]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Abstract]
Add: effect of dilutive securities (in shares)
Weighted Average Number of Shares Outstanding, Diluted, Adjustment
Other
Other Assets, Noncurrent
Transmission
Electric Utility Customer Class Transmission [Member]
Transmission customer class from which revenues are generated by the use of KCP&L's and GMO's transmission network by the SPP on behalf of other power providers [Member]
Regulatory assets
Regulatory Asset
Asset Acquisition, Price of Acquisition, Expected
Asset Acquisition, Price of Acquisition, Expected
Antidilutive Securities, Name [Domain]
Antidilutive Securities, Name [Domain]
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Operating Segments [Member]
Operating Segments [Member]
Class of Financing Receivable [Domain]
Class of Financing Receivable [Domain]
Accounts, Notes, Loans and Financing Receivable by Receivable Type [Axis]
Receivable Type [Axis]
Cash Flows from Operating Activities
Net Cash Provided by (Used in) Operating Activities
Evergy Missouri West
Evergy Missouri West Inc [Member]
Evergy Missouri West Inc [Member]
Accounts receivable pledged as collateral
Accounts receivable pledged as collateral
Increase Decrease In Accounts Receivable Pledged As Collateral
The increase (decrease) during the reporting period in the amount due within one year (or one business cycle) from customers for the credit sale of goods and services where those amounts have been pledged as collateral.
CASH FLOWS FROM (USED IN) OPERATING ACTIVITIES:
Net Cash Provided by (Used in) Operating Activities [Abstract]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Mortgage Bonds
Secured Debt
Secured Debt [Member]
Other
Stockholders' Equity, Other
Prepaid expenses
Prepaid Expense, Current
Plant to be retired, net
Plant To Be Retired [Member]
Plant To Be Retired [Member]
Net periodic benefit costs (income)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)
(Gains) losses from investments in early-stage clean energy and energy solution companies
GainsLossesFromInvestmentsInEarlyStageCleanEnergyAndEnergySolutionCompanies
(Gains) Losses From Investments In Early Stage Clean Energy And Energy Solution Companies
Measurement Frequency [Axis]
Measurement Frequency [Axis]
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
State and local obligations
US States and Political Subdivisions Debt Securities [Member]
Public Utilities, Recovery Mechanism's Sharing Percentage for Fuel Cost
Public Utilities, Recovery Mechanism's Sharing Percentage for Fuel Cost
Public Utilities, Recovery Mechanism's Sharing Percentage for Fuel Cost
Increase in regulatory asset
IncreaseInRegulatoryAsset
Increase In Regulatory Asset
Entity Small Business
Entity Small Business
Level 3
Fair Value, Inputs, Level 3 [Member]
Antidilutive securities excluded from computation of earnings per share, amount
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration]
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration]
Asset Acquisition [Axis]
Asset Acquisition [Axis]
Credit Facility [Domain]
Credit Facility [Domain]
Taxes other than income tax
Taxes, Miscellaneous
Accounts and Financing Receivables [Table]
Accounts and Financing Receivables [Table]
Goodwill
Goodwill
Income tax benefit (expense) [Member]
Income tax benefit (expense) [Member]
Benefit (expense) from income taxes due to gain (loss) recognized.
Beginning balance January 1
Ending balance June 30
Accounts Receivable, Allowance for Credit Loss
Derivative hedging activity
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Regulatory asset representing differences between pension and post retirement costs for GAAP and for ratemaking
RegulatoryAssetLiabilityRepresentingDifferencesBetweenPensionAndPostRetirementCostsForGAAPAndForRatemaking
Regulatory asset (liability) that represents the differences between pension and post-retirement costs under GAAP and pension and post-retirement costs for ratemaking that will be recovered or refunded in rates, as appropriate, over future periods.
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
Fixed income funds
Fixed Income Funds [Member]
RSU With Performance Measures
Restricted Stock Units With Performance Measures [Member]
Restricted Stock Units With Performance Measures [Member]
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.
Entity Information [Line Items]
Entity Information [Line Items]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table]
Other financing activities
Proceeds from (Payments for) Other Financing Activities
Senior Notes Due 2043 EMW
Senior Notes Series C due 2043 EMW [Member]
Senior Notes Series C due 2043.
Antidilutive Security, Excluded EPS Calculation [Table]
Antidilutive Security, Excluded EPS Calculation [Table]
Comprehensive Income, Net of Tax, Attributable to Parent, Total
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Pension Benefits
Pension Plan [Member]
Offsetting Derivative Assets [Abstract]
Offsetting Derivative Assets [Abstract]
Other
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration]
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration]
Corporate bonds
Corporate Debt Securities [Member]
PROPERTY, PLANT AND EQUIPMENT, NET, includes $122.9 and $126.5 related to variable interest entity, respectively
Property, plant and equipment, net
Property, plant and equipment, net
Property, Plant and Equipment, Net
ICFR Auditor Attestation Flag
ICFR Auditor Attestation Flag
Noncontrolling Interests
Equity, Attributable to Noncontrolling Interest
COMPREHENSIVE INCOME
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Number of reporting units
Number of Reporting Units
Common stock - par value (in dollars per share)
Common Stock, Par or Stated Value Per Share
Fuel inventory and supplies
Increase (Decrease) In Energy Related Inventory
Increase (Decrease) In Energy Related Inventory
Cash Borrowings
Cash Borrowings
Revolving Credit Facility [Member]
CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES:
Net Cash Provided by (Used in) Investing Activities [Abstract]
Lease liability recorded in other current liabilities
Operating Lease, Liability, Current
Natural gas commodity contract noncurrent
NaturalGasCommodityContractNoncurrent [Member]
Natural gas commodity contract noncurrent
Offsetting Liabilities [Line Items]
Offsetting Liabilities [Line Items]
Debt Instrument, Convertible, Threshold Consecutive Trading Days
Debt Instrument, Convertible, Threshold Consecutive Trading Days
Deferral
InvestmentTaxCreditDeferral
Investment Tax Credit Deferral
Property, plant and equipment, gross
Property, Plant and Equipment, Gross
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
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Intercompany allocations
Defined Benefit Plans Intercompany Allocations Net
Increase (decrease) in net periodic benefit costs related to intercompany Net allocations.
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Table]
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Table]
Amortization of federal investment tax credits
Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Percent
Diluted (in shares)
Diluted average number of common shares outstanding (in shares)
Weighted Average Number of Shares Outstanding, Diluted
Regulatory adjustment
Defined Benefit Plan Regulatory Adjustment Net
Increase (decrease) in net periodic benefit costs related to regulatory adjustments Net.
Total Evergy, Inc. Shareholders' Equity
Equity, Attributable to Parent
Senior Notes Due 2029
Senior Notes 2.90 Percent Series Due 2029 [Member]
Senior Notes 2.90 Percent Series Due 2029 [Member]
Regulatory Liability, Amortization Period
Regulatory Liability, Amortization Period
Evergy Transmission Company LLC
Evergy Transmission Company LLC [Member]
Evergy Transmission Company LLC [Member]
Derivative Asset, Current
Derivative Asset, Current
Pension and Postretirement Benefits
PensionPlansAndOtherPostretirementBenefitPlansDefinedBenefitMember [Member]
Pension plans and other postretirement benefit plans defined benefit member
Letters of Credit
Letters of Credit Outstanding, Amount
Unearned compensation
UnearnedCompensation [Abstract]
UnearnedCompensation
Pollution Control Bonds Due 2031 EKS
Pollution Control Bonds Due 2031 EKS [Member]
Pollution Control Bonds Due 2031 EKS [Member]
Fuel recovery mechanisms
Deferred Fuel Costs [Member]
Accounts Payable
Accounts Payable
Pollution Control Bonds Due 2032A EKS
PollutionControlBondsDue2032AEKS [Member]
Pollution Control Bonds Due 2032A EKS [Member]
EIRR Bonds Series 2007A and 2007B due 2035 EM
EIRR Bonds Series 2007A and 2007B due 2035 EM [Member]
EIRR Bonds Series 2007A and 2007B due 2035 EM [Member]
Auditor [Table]
Auditor [Table]
CASH, CASH EQUIVALENTS AND RESTRICTED CASH:
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect [Abstract]
2024 Sunflower Sky Purchase [Member]
2024 Sunflower Sky Purchase [Member]
2024 Sunflower Sky Purchase
Document Fiscal Period Focus
Document Fiscal Period Focus
Securitized Bonds
SecuritizedBonds [Member]
Securitized Bonds
Equity securities
Equity Securities [Member]
Convertible note
Convertible Debt Securities [Member]
2023 Rate case proceedings
A2023RateCaseProceedings [Member]
A2023RateCaseProceedings
EIRRBondsDue2045EM
EIRRBondsDue2045EM [Member]
EIRRBondsDue2045EM
Assets [Abstract]
Assets [Abstract]
Retirement Plan Type [Domain]
Retirement Plan Type [Domain]
Total other comprehensive income
Total recognized in OCI or regulatory asset/liability
Other Comprehensive Income (Loss), Net of Tax
Recovery period Kansas Sky solar generation plant
RecoveryPeriodKansasSkySolarGenerationPlantYears
Recovery period Kansas Sky solar generation plant, years
Document Type
Document Type
Derivative, Name [Domain]
Derivative Contract [Domain]
Derivative Contract [Domain]
Interest rate
Debt Instrument, Interest Rate, Effective Percentage
Segment Financial Information [Table Text Block]
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Derivative Liability, Statement of Financial Position [Extensible Enumeration]
Derivative Liability, Statement of Financial Position [Extensible Enumeration]
Pollution Control Bonds Due 2032A EKC
Pollution Control Bonds Due 2032A EKC [Member]
Pollution Control Bonds Due 2032A EKC [Member]
OTHER INCOME (EXPENSE):
Other Income and Expenses [Abstract]
Defined Benefit Plan [Table]
Defined Benefit Plan [Table]
Inventory, Current [Table]
Inventory, Current [Table]
Maximum
Maximum [Member]
Antidilutive Securities [Axis]
Antidilutive Securities [Axis]
Accounts payable
Due to Related Party, Current
Accounts Payable, Current
Equity Securities - Fifth Fund
Equity Securities - Fifth Fund [Member]
Equity Securities - Fifth Fund [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table]
Offsetting Liabilities [Table Text Block]
Offsetting Liabilities [Table Text Block]
Related party transaction
Related Party Transaction, Amounts of Transaction
Statistical Measurement [Axis]
Statistical Measurement [Axis]
Distributions to shareholders of noncontrolling interests
Payments to Noncontrolling Interests
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Line Items]
OTHER ASSETS:
Investments And Other Assets [Abstract]
Allowance for equity funds used during construction
Increase (Decrease) in Allowance for Equity Funds Used During Construction
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
FERC 2025 TFR Proceeding [Member]
FERC 2025 TFR Proceeding [Member]
FERC 2025 TFR Proceeding
Investment, Name [Axis]
Investment, Name [Axis]
Debt Instrument, Redemption Price, Percentage
Debt Instrument, Redemption Price, Percentage
Prior service cost
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)
LONG-TERM DEBT
Long-Term Debt [Text Block]
Diluted earnings per common share (in dollars per share)
Earnings Per Share, Diluted
Earnings Per Share, Diluted
Counterparty Name [Domain]
Counterparty Name [Domain]
Current Income Tax Expense (Benefit), Total
Current Income Tax Expense (Benefit)
Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest
Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest [Member]
Prior service cost
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Including Portion Attributable to Noncontrolling Interest [Member]
Regulatory Liability [Domain]
Regulatory Liability [Domain]
Ownership [Axis]
Ownership [Axis]
Equity Securities - Fourth Fund
Equity Securities - Fourth Fund [Member]
Equity Securities - Fourth Fund [Member]
Retirement Benefits [Abstract]
Retirement Benefits [Abstract]
Customer [Axis]
Customer [Axis]
Statement of Financial Position [Abstract]
Statement of Financial Position [Abstract]
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]
Net gain due to settlement
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), after Tax
Alternative investments fund
Alternative investments fund
Alternative Investment Fund [Member]
Alternative Investment Fund [Member]
Mortgage Bonds Due 2033 EM
MortgageBondsDue2033EM [Member]
Mortgage Bonds Due 2033 EM
General Mortgage Bonds EIRR Series 2005
General Mortgage bonds EIRR series 2005 [Member]
General Mortgage bonds EIRR series 2005
NET INCOME
Net income
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net
Income tax expense
Income Tax Expense (Benefit), Total
Income Tax Expense (Benefit)
Interest cost
Defined Benefit Plan, Interest Cost
Additional Amount of Outstanding Principal Under Receivables Agreement
AdditionalAmountofOutstandingPrincipalUnderReceivablesAgreement
Additional amount of outstanding principal under receivables agreement
Notional amount
Derivative, Notional Amount
Debt Instrument, priority debt percentage of tangible net worth, maximum
DebtInstrumentCovenantPriorityDebtPercentageOfTangibleNetWorthMaximum
Debt Instrument, Covenant, Priority Debt Percentage of Tangible Net Worth, Maximum
Debt instrument, debt default, threshold
Debt Instrument, Debt Default, Threshold
Debt Instrument, Debt Default, Threshold
Derivative Asset
Derivative Asset
Non-service cost component of net benefit cost
Non Service Cost Component Of Net Benefit Cost
Non Service Cost Component Of Net Benefit Cost
FirstMortgageBondsAdditionalPrincipalAvailableToBeIssued
FirstMortgageBondsAdditionalPrincipalAvailableToBeIssued
First Mortgage Bonds additional principal available to be issued
Regulatory Account [Member]
Regulatory Account [Member]
Derivative instruments in a regulatory account relationship.
Total revenue from contracts with customers
Revenue from Contract with Customer, Excluding Assessed Tax
Changes in other liabilities
Increase (Decrease) in Other Noncurrent Liabilities
Statement of Comprehensive Income [Abstract]
Statement of Comprehensive Income [Abstract]
Cash Flows used in Investing Activities
Net Cash Provided by (Used in) Investing Activities
Interest expense
Interest Expense, Operating and Nonoperating
Stock compensation
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Percent
Accrued compensation and benefits
Employee-related Liabilities, Current
Prepaid expenses and other current assets
Increase (Decrease) in Prepaid Expense and Other Assets
Short-term Debt, Type [Domain]
Short-Term Debt, Type [Domain]
Dogwood costs recovery period
DogwoodCostsRecoveryPeriod
Dogwood costs recovery period
Schedule of Other Nonoperating Income (Expense)
Schedule of Other Nonoperating Income (Expense) [Table Text Block]
Derivative Instruments, Gain (Loss) [Table]
Derivative Instruments, Gain (Loss) [Table]
Effect Of [Abstract]
Effect Of [Abstract]
Effect Of [Abstract]
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Abstract]
Legal Entity [Axis]
Legal Entity [Axis]
Regulatory Asset [Axis]
Regulatory Asset [Axis]
Other Evergy
Other Evergy [Member]
Other Evergy [Member]
Related Party Transaction [Axis]
Related Party Transaction [Axis]
Total nuclear decommissioning trust
Decommissioning Fund Investments, Fair Value
Commodity Contract [Member]
Commodity Contract [Member]
Long-term Debt, Type [Domain]
Long-Term Debt, Type [Domain]
Entity Address, State or Province
Entity Address, State or Province
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [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]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Disclosure [Line Items]
Public utilities PISA allowed depreciation expense recovery, percent
PublicUtilitiesPISAAllowedDepreciationExpenseRecoveryPercent
Public utilities PISA allowed depreciation expense recovery, percent
Schedule of Health Care Cost Trend Rates
Schedule of Health Care Cost Trend Rates [Table Text Block]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts, Notes, Loans and Financing Receivable [Line Items]
SHORT-TERM BORROWINGS AND SHORT-TERM BANK LINES OF CREDIT
Short-Term Debt [Text Block]
Issuance of stock compensation and reinvested dividends, net of tax withholding (in shares)
Stock Issued During Period, Shares, Dividend Reinvestment Plan And Share-Based Compensation Net
Stock Issued During Period, Shares, Dividend Reinvestment Plan And Share-Based Compensation Net
LIABILITIES AND EQUITY
Liabilities and Equity [Abstract]
Offsetting Assets [Line Items]
Offsetting Assets [Line Items]
Schedule of Net Benefit Costs
Schedule of Net Benefit Costs [Table Text Block]
Pollution Control Bonds Due 2027 EKS
Pollution Control Bonds Due 2027 EKS [Member]
Pollution Control Bonds Due 2027 EKS [Member]
Valuation allowance
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent
Offsetting Liabilities [Table]
Offsetting Liabilities [Table]
Fair Value
Estimate of Fair Value Measurement [Member]
Interest Rate Contract [Member]
Interest Rate Contract [Member]
Property, Plant and Equipment [Table]
Property, Plant and Equipment [Table]
Minimum expected investment to construct natural gas plant
MinimumExpectedConstructionCostOfElectricityGenerationPlant
Minimum expected construction cost of electricity generation plant
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) [Line Items]
Amortization of regulatory asset
Amortization of Regulatory Asset
Short-term Debt, Type [Axis]
Short-Term Debt, Type [Axis]
Dividends Payable, Current
Dividends Payable, Current
Recommended return on equity
Recommended return on equity
Recommended return on equity
Subsequent Event
Subsequent Event [Member]
OPERATING EXPENSES:
Costs and Expenses [Abstract]
Other
Restricted Cash and Cash Equivalents, Current
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
Investment earnings (loss)
Investment earnings
Gain (Loss) on Investments
Segments [Domain]
Segments [Domain]
Unbilled
Unbilled Revenues [Member]
Senior Notes Due 2048 EM
Senior Notes Due 2048 EM [Member]
Senior Notes Due 2048 EM [Member]
Non-qualified benefit obligations
UnfundedAccumulatedBenefitObligationForNonQualifiedPlans
The unfunded accumulated benefit obligation related to non-qualified benefit plans.
Nuclear fuel, net
Nuclear Fuel [Member]
Accounts, Notes, Loans and Financing Receivable by Billing Status, Type [Axis]
Billing Status, Type [Axis]
EIRR Bonds Due 2026 EM
EIRRBondsDue2026EM [Member]
EIRR Bonds Due 2026 EM
Transmission line length
Transmission Line Length
Transmission Line Length
High-yield bond fund
High-Yield Bond Fund [Member]
High-Yield Bond Fund [Member]
Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]
Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Property, Plant and Equipment, Type [Axis]
Long-Lived Tangible Asset [Axis]
Entity Public Float
Entity Public Float
Investment in Early Stage Clean Energy and Energy Solution Investments
Investment in Early Stage Clean Energy and Energy Solution Investments
Investment in Early Stage Clean Energy and Energy Solution Investments
Public Utilities, Regulatory Proceeding [Domain]
Public Utilities, Regulatory Proceeding [Domain]
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
Income from corporate-owned life insurance
Income from corporate-owned life insurance
Income From Corporate Owned Life Insurance
Income From Corporate Owned Life Insurance
INCOME BEFORE INCOME TAXES
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest
Net money pool lending
Payments for Advance to Affiliate
Dividends payable
Dividends Payable
Shares, Outstanding
Beginning balance (in shares)
Ending balance (in shares)
Shares, Outstanding
Investment Tax Credit Amortization
Investment Tax Credit Amortization
The amount deducted from an entities' taxes, reflecting a percentage of an amount invested in certain assets spread over the useful life of those assets; the part related to the amortization of investment tax credits.
Local Phone Number
Local Phone Number
Other segment costs
OtherSegmentItemsCosts
Other segment items costs
Industry aggregate limit for nuclear insurance
Industry Aggregate Limit For Nuclear Insurance
Industry Aggregate Limit For Nuclear Insurance
Derivative hedging activity
Derivative Hedging Activity [Abstract]
Derivative Hedging Activity [Abstract]
MortgageBondsDue2034
Mortgage Bonds Due 2034 EM [Member]
Mortgage Bonds Due 2034 EM
Mortgage Bonds Due 2042 EKC
MortgageBondsDue2042EKC [Member]
Mortgage Bonds Due 2042 EKC [Member]
Derivative, Net Liability Position, Aggregate Fair Value
Derivative, Net Liability Position, Aggregate Fair Value
Convertible Notes Payable
Convertible Notes Payable [Member]
February 2021 winter weather event
February2021WinterWeatherEvent [Member]
Discloses the amount of regulatory asset arising from deferred extraordinary fuel and purchased power costs incurred as a result of the February 2021 winter weather event.
Changes in working capital items:
Increase (Decrease) in Operating Capital [Abstract]
LONG-TERM LIABILITIES:
Liabilities, Noncurrent [Abstract]
Return on equity, requested
Public Utilities, Requested Return on Equity, Percentage
Derivative Liability, Fair Value, Gross Liability
Derivative Liability, Subject to Master Netting Arrangement, before Offset
Estimates Of Environmental Financial Impact And Related Issues [Line Items]
Estimates Of Environmental Financial Impact And Related Issues [Line Items]
Property, Plant and Equipment, Type [Domain]
Long-Lived Tangible Asset [Domain]
Statement of Income Location, Balance [Axis]
Statement of Income Location, Balance [Axis]
Credit Derivative, Maximum Exposure, Undiscounted
Credit Derivative, Maximum Exposure, Undiscounted
Accrued interest, includes $1.3 and $1.3 related to variable interest entity, respectively
Accrued interest
Interest Payable, Current
NAV, number of funds
Fair Value, Investments, Entities That Calculate Net Asset Value, Number Of Funds
Fair Value, Investments, Entities that Calculate Net Asset Value, Number Of Funds
Fuel inventory and supplies
Fuel inventory and supplies
Energy Related Inventory
Debt Disclosure [Abstract]
Debt Disclosure [Abstract]
Senior Notes Due 2033 EMW
Senior Notes Series B due 2033 EMW [Member]
Senior Notes Series B due 2033 EMW.
Common Stock
Common Stock
Common Stock [Member]
Term Loan Facility
Line of Credit [Member]
Segment Reporting [Abstract]
Segment Reporting [Abstract]
Entity Central Index Key
Entity Central Index Key
Equity securities
evrg_OtherEquityInvestmentFairValueDisclosure
OtherEquityInvestmentFairValueDisclosure
Schedule of Fuel Inventory and Supplies
Schedule of Inventory, Current [Table Text Block]
Plant to be Retired, Net
Plant Retirement and Abandonment, Policy [Policy Text Block]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted Cash and Cash Equivalents Items [Line Items]
Segments and Related Information
Segment Reporting Disclosure [Text Block]
Current maturities of long-term debt, includes $16.6 and $16.2 related to variable interest entity, respectively
Current maturities of long-term debt
Current maturities of long-term debt
Long-Term Debt, Current Maturities
Other receivables
Other Receivables, Gross, Current
Mortgage Bonds Due 2034 EMW
Mortgage Bonds Due 2034 EMW [Member]
Mortgage Bonds Due 2034
Stock compensation expense
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition
Measurement Basis [Axis]
Measurement Basis [Axis]
Funded by trusts containing assets
SegregatedAssetsForNonQualifiedBenefitPlans
SegregatedAssetsForNonQualifiedBenefitPlans
Power commodity contract noncurrent
PowerCommodityContractNoncurrent [Member]
Power commodity contract noncurrent
Senior Notes Due 2041 EM
Senior Notes Due 2041 EM [Member]
Senior Notes Due 2041 EM.
Owned generating capacity and renewable purchased power
Owned Generating Capacity And Renewable Purchased Power
Owned Generating Capacity and Renewable Purchased Power
Unsecured Debt
Unsecured Debt [Member]
Consolidated Entities [Axis]
Consolidated Entities [Axis]
Maximum Amount Of First Mortgage Bonds Authorized
Maximum Amount Of First Mortgage Bonds Authorized
The maximum amount of First Mortgage Bonds authorized to be issued under the mortgage and deed of trust.
Wholesale
Electric Utility Customer Class Wholesale [Member]
Wholesale customer class from which revenues are generated by the sale of wholesale power and capacity when the power is not required for customers within service territory [Member]
Number of active wholly owned subsidiaries
Number Of Wholly Owned Subsidiaries
Number Of Wholly Owned Subsidiaries
City Area Code
City Area Code
NAV, number of extensions
Fair Value, Investments, Entities That Calculate Net Asset Value, Number Of Extensions
Fair Value, Investments, Entities that Calculate Net Asset Value, Number Of Extensions
CURRENT LIABILITIES:
Liabilities, Current [Abstract]
Auditor Location
Auditor Location
Federal tax credits
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent
Federal or state tax rate change
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent
Dividend equivalents declared
Dividend, Share-Based Payment Arrangement
Compensation expense recognized
APIC, Share-Based Payment Arrangement, Restricted Stock Unit, Increase for Cost Recognition
Maximum expected investment to construct natural gas plant
MaximumExpectedConstructionCostOfElectricityGenerationPlant
Maximum expected construction cost of electricity generation plant
Domestic
Geographic Distribution, Domestic [Member]
Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract]
Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract]
RSUs with Service Requirements
Restricted Stock Units With Service Requirements [Member]
Restricted Stock Units With Service Requirements
Accrued taxes
Increase (Decrease) in Accrued Taxes Payable
Mortgage Bonds Due 2049 EKC
MortgageBondsDue2049KEKC [Member]
Mortgage Bonds Due 2049 EKC [Member]
Available Borrowings Capacity
Line of Credit Facility, Remaining Borrowing Capacity
Dividends Payable [Table]
Dividends Payable [Table]
Summary of Derivative Instruments [Abstract]
Summary of Derivative Instruments [Abstract]
Retirements of long-term debt of variable interest entities
Retirements of Long Term Debt Of VIEs
Retirements of Long Term Debt Of VIEs
Long-term debt, net, includes $287.6 and $295.7 related to variable interest entity, respectively
Long-term debt, net
Total excluding current maturities
Long-Term Debt, Excluding Current Maturities
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Evergy Inc Money Pool
Evergy Inc Money Pool [Member]
Transactions related to the Evergy Inc Money Pool, an internal financing arrangement between Evergy Inc, Evergy Metro and Evergy Missouri West.
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
ORGANIZATION AND BASIS OF PRESENTATION
Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block]
BASIC AND DILUTED EARNINGS PER AVERAGE COMMON SHARE OUTSTANDING ATTRIBUTABLE TO EVERGY, INC. (see Note 1)
Earnings Per Share [Abstract]
Mortgage Bonds Due 2053 EKC
MortgageBondsDue2053EKS [Member]
Mortgage Bonds Due 2053 EKS
Property, plant and equipment additions
Non Cash Property Plant And Equipment Additions, Gross
Non-cash property, plant and equipment additions, Gross
Retained earnings
Retained Earnings (Accumulated Deficit)
Public Utilities, Refund Percent On Earnings Over Approved Return On Equity
PublicUtilitiesRefundPercentOnEarningsOverApprovedReturnOnEquity
Public Utilities, Refund Percent On Earnings Over Approved Return On Equity
Class of Stock [Domain]
Class of Stock [Domain]
Officer compensation limitation
EffectiveIncomeTaxRateReconciliationOfficerCompensationLimitation
Officer compensation limitation
Cash Flow Hedge Loss to be Reclassified within Twelve Months
Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months
Related Party Transaction [Line Items]
Related Party Transaction [Line Items]
Net deferred income taxes and credits
Deferred Income Taxes and Tax Credits
Foreign governments
Debt Security, Government, Non-US [Member]
Schedule of Short-term Debt
Schedule of Short-Term Debt [Table Text Block]
Other
Other Trust Assets [Member]
Other assets within the trust fund.
Regulatory assets, includes $16.3 and $15.9 related to variable interest entity, respectively
Regulatory assets
Regulatory Asset, Current
International
Geographic Distribution, Foreign [Member]
Junior Subordinated Notes Due 2055
Junior Subordinated Notes Due 2055 [Member]
Junior Subordinated Notes Due 2055
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.
Conversion of Stock, Name [Domain]
Conversion of Stock, Name [Domain]
Dividends declared on common stock
Dividends, Common Stock, Cash
Amendment Flag
Amendment Flag
Book Value
Reported Value Measurement [Member]
Commercial paper
Commercial Paper
Transmission line electrical potential
Transmission Line Electrical Potential
Transmission Line Electrical Potential
Investment in corporate-owned life insurance
Investment in corporate-owned life insurance
Payment to Acquire Life Insurance Policy, Investing Activities
Restrictions on Cash and Cash Equivalents
Restrictions on Cash and Cash Equivalents [Table Text Block]
Senior Notes Due 2029A
Senior Notes 3.77 Percent Series Due 2029 [Member]
Senior Notes 3.77 Percent Series Due 2029 [Member]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax
Fair Value Hierarchy and NAV [Domain]
Fair Value Hierarchy and NAV [Domain]
Junior Notes
Junior Notes [Member]
Debt issued
Debt Instrument, Face Amount
Derivative Liability, Noncurrent
Derivative Liability, Noncurrent
Entity Address, Postal Zip Code
Entity Address, Postal Zip Code
Nuclear liability insurance, maximum available commercial insurance
Nuclear Liability Insurance Maximum Available Commercial Insurance
Nuclear Liability Insurance Maximum Available Commercial Insurance
Evergy Missouri West Other Proceedings
EvergyMissouriWestOtherProceedings [Member]
Evergy Missouri West Other Proceedings
Interest Rate Swap [Member]
Interest Rate Swap [Member]
Cash and cash equivalents
Cash and cash equivalents
Cash and Cash Equivalents, at Carrying Value
Evergy, Inc.
Evergy
Evergy [Member]
Evergy [Member]
Schedule of Amounts Recognized in Balance Sheet
Schedule of Amounts Recognized in Balance Sheet [Table Text Block]
Other investing activities
Payments for (Proceeds from) Other Investing Activities
Other current liabilities
Increase (Decrease) in Other Current Liabilities
Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction [Abstract]
Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction [Abstract]
Pollution Control Bonds
Pollution Control Bonds [Member]
Pollution Control Bonds [Member]
Auditor Name
Auditor Name
Debt Instrument, Convertible, Threshold Trading Days
Debt Instrument, Convertible, Threshold Trading Days
Derivative Liability, Subject to Master Netting Arrangement, after Offset [Abstract]
Derivative Liability, Subject to Master Netting Arrangement, after Offset [Abstract]
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Regulatory Proceedings [Table]
Public Utilities General Disclosures [Table]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]
Depreciation and amortization
Depreciation and amortization
Depreciation, Depletion and Amortization, Nonproduction
Fair Value Measurement [Domain]
Fair Value Measurement [Domain]
Schedule of Short-term Debt [Table]
Short-Term Debt [Table]
Receivables Billing Status [Domain]
Receivables Billing Status [Domain]
Accounts payable
Increase (Decrease) in Accounts Payable
Class of Financing Receivable [Axis]
Class of Financing Receivable [Axis]
Income Tax Receivable
Income Tax Receivable [Member]
Income Tax Receivable [Member]
2024 Foxtrot Purchase [Member]
2024 Foxtrot Purchase [Member]
2024 Foxtrot Purchase
Designated as Hedging Instrument [Member]
Designated as Hedging Instrument [Member]
Mortgage Bonds Due 2025 EKC
Mortgage Bonds Due 2025 EKC [Member]
Mortgage Bonds Due 2025 EKC [Member]
TOTAL ASSETS
Assets
Federal Energy Regulatory Commission
Federal Energy Regulatory Commission [Member]
Federal Energy Regulatory Commission [Member]
Auditor [Line Items]
Auditor [Line Items]
Total recognized in net periodic benefit costs and OCI or regulatory asset/liability
Defined Benefit Plan, Amount Recognized in Net Periodic Benefit Cost (Credit) and Other Comprehensive (Income) Loss, before Tax
Income taxes receivable
Income Taxes Receivable, Current
Additions to property, plant and equipment
Payments to Acquire Property, Plant, and Equipment
Other
Other Liabilities, Noncurrent
Commitments and Contingencies (Note 11)
Commitments and Contingencies (Note 11)
Commitments and Contingencies
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
Schedule of Effective Income Tax Rate Reconciliation
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Mortgage Bonds Due 2043 EKC
MortgageBondsDue2043BEKC [Member]
Mortgage Bonds Due 2043B EKC [Member]
MortgageBondsDue2035EKC
MortgageBondsDue2035EKC [Member]
Mortgage Bonds Due 2035 EKC
Investment Tax Credits
InvestmentTaxCredits [Abstract]
Investment Tax Credits
Related Party Transaction [Table]
Related Party Transaction [Table]
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]
A2025 Rate case proceedings
A2025RateCaseProceedings [Member]
A 2025 Rate case proceedings
SPP network transmission costs
SPPNetworkTransmissionCosts
Cost incurred for SPP transmission costs
Not Designated as Hedging Instrument [Member]
Not Designated as Hedging Instrument [Member]
2024 Natural Gas Plant Purchase
2024NaturalGasPlantPurchase [Member]
2024 Natural Gas Plant Purchase
Derivative, Credit Risk Related Contingent Features [Abstract]
Derivative, Credit Risk Related Contingent Features [Abstract]
Nuclear liability insurance, owners insurance amount, maximum
Nuclear Liability Insurance Owners Insurance Amount Maximum
Nuclear Liability Insurance Owners Insurance Amount Maximum
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
Debt Instrument [Axis]
Debt Instrument [Axis]
Net income attributable to Evergy, Inc.
Net Income (Loss) Attributable to Parent
Offsetting Assets [Table Text Block]
Offsetting Assets [Table Text Block]
Master Credit Facility
Line of Credit Facility, Current Borrowing Capacity
Sibley Unit 3 impairment loss and other regulatory disallowances
Sibley Unit 3 impairment loss and other regulatory disallowances
Sibley Unit 3 impairment loss and other regulatory disallowances
Mortgage Bonds Due 2027 EM
MortgageBondsDue2027EMW [Member]
MortgageBondsDue2027EMW
Schedule of Allocation of Plan Assets
Schedule of Allocation of Plan Assets [Table Text Block]
Net money pool lending
Proceeds from Collection of Advance to Affiliate
Entity File Number
Entity File Number
Cost of investment in renewable generation, net of cash acquired
CostOfInvestmentInRenewableGenerationNetOfCashAcquired
Cost of investment in renewable generation, net of cash acquired
Schedule of Defined Benefit Plan, Assumptions
Defined Benefit Plan, Assumptions [Table Text Block]
Consolidated Entities [Domain]
Consolidated Entities [Domain]
Non-controlling interests
Noncontrolling Interest [Member]
Other expense
Other expense
Other expense, total
Other Nonoperating Expense
Income Statement [Abstract]
Income Statement [Abstract]
Entity Address, Address Line One
Entity Address, Address Line One
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current Federal Tax Expense (Benefit)
Current Federal Tax Expense (Benefit)
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Common Shares Outstanding
Weighted Average Number of Shares Outstanding Reconciliation [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.
Schedule of Costs of Retirement Plans
Schedule of Costs of Retirement Plans [Table Text Block]
Loss Contingency, Nature [Domain]
Loss Contingency, Nature [Domain]
Other
Other Noncash Income (Expense)
Mortgage Bonds Due 2045 EKC
MortgageBondsDue2045EKC [Member]
Mortgage Bonds Due 2045 EKC [Member]
Schedule of Expected Benefit Payments
Schedule of Expected Benefit Payments [Table Text Block]
Non-controlling interest
Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Percent
FERC 2024 TFR Proceeding
FERC2024TFRProceeding [Member]
FERC 2024 TFR Proceeding
Dividends Payable, Date to be Paid
Dividends Payable, Date to be Paid
Less: Net income attributable to noncontrolling interests
Net Income (Loss) Attributable to Noncontrolling Interest
Regulatory Agency [Axis]
Regulatory Agency [Axis]
Other
Restricted Cash and Cash Equivalents, Noncurrent
Document Quarterly Report
Document Quarterly Report
Evergy Metro
Evergy Metro
Evergy Metro
Evergy Metro Inc [Member]
Evergy Metro Inc [Member]
Reclassification to expenses, net of tax
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss), Net of Tax
Related Party [Axis]
Related and Nonrelated Parties [Axis]
Basic (in shares)
Weighted average equivalent common shares outstanding - basic (in shares)
Weighted Average Number of Shares Outstanding, Basic
Evergy Kansas Central
Evergy Kansas Central Inc [Member]
Utility operating in Kansas.
Nuclear liability insurance, owners property insurance, maximum
Nuclear Liability Insurance Owners Property Insurance Maximum
Nuclear Liability Insurance Owners Property Insurance Maximum
Total Equity
Beginning balance
Ending balance
Equity, Including Portion Attributable to Noncontrolling Interest
Regulatory Agency [Domain]
Regulatory Agency [Domain]
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
Construction work in progress
Construction in Progress [Member]
Jointly Owned Utility Plant [Axis]
Jointly Owned Utility Plant [Axis]
2022 Oklahoma Wind Farm Purchase
2022OklahomaWindFarmPurchase [Member]
2022 Oklahoma Wind Farm Purchase
Entity Filer Category
Entity Filer Category
Proceeds from investment in corporate-owned life insurance
Proceeds from investment in corporate-owned life insurance
Proceeds from Life Insurance Policy
Collateral Already Posted, Aggregate Fair Value
Collateral Already Posted, Aggregate Fair Value
Derivative Asset, Noncurrent
Derivative Asset, Noncurrent
SecuritizedBondsDue2040EMW [Member]
SecuritizedBondsDue2040EMW [Member]
Securitized Bonds Due 2040 EMW
Statistical Measurement [Domain]
Statistical Measurement [Domain]
Senior Notes Due 2025 EMW
Senior Notes Series A due 2025 EMW [Member]
Senior Notes Series A due 2025 EMW
Derivatives, Fair Value [Line Items]
Derivatives, Fair Value [Line Items]
Nuclear decommissioning trust - equity securities
Decommissioning Trust Assets - Equity [Member]
Decommissioning Trust Assets - Equity [Member]
Debt securities
Debt Securities [Member]
Rate increase net of fuel and purchased power decrease pending approval
PublicUtilitiesRateIncrease
PublicUtilitiesRateIncreaseNetOfFuelAndPurchasedPowerDecreasePendingApproval
Other regulatory disallowances
Other regulatory disallowances
Other regulatory disallowances
Other
Other Liabilities, Current
Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]
Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Schedule of Earnings Per Share, Basic and Diluted
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Variable Interest Entities
Variable Interest Entity, Primary Beneficiary [Member]
Jointly Owned Utility Plant [Domain]
Jointly Owned Utility Plant [Domain]
Derivative [Line Items]
Derivative [Line Items]
Income taxes, net of refunds
Income Taxes Paid, Net
Debt Instrument, Convertible, Conversion Ratio
Debt Instrument, Convertible, Conversion Ratio
RATE MATTERS AND REGULATION
Public Utilities Disclosure [Text Block]
Derivative [Table]
Derivative [Table]
Income Tax Contingency [Table]
Income Tax Contingency [Table]
Other expense
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.
Electric plant in service
Electric Plant In Service [Member]
Electric Plant In Service [Member]
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Futures contracts [Member]
Future [Member]
Fair value of open derivative positions, gross values before netting agreements and netting of cash collateral [Table Text Block]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]
Operations and customer
OperationsCosts
Operations Costs
Weighted Average Interest Rate on Term Loan Facility
Short-Term Debt, Weighted Average Interest Rate, at Point in Time
Applications for predetermination
ApplicationsForPredetermination [Member]
Applications for predetermination
Cash Flow Hedging [Member]
Cash Flow Hedging [Member]
Missouri Public Service Commission
Missouri Public Service Commission [Member]
Information related to the Public Service Commission of the State of Missouri.
Pollution Control Bonds Due 2032B EKS
PollutionControlBondsDue2032BEKS [Member]
Pollution Control Bonds Due 2032B EKS [Member]
Schedule of Regulatory Liabilities
Schedule of Regulatory Liabilities [Table Text Block]
Service cost
Defined Benefit Plan, Service Cost
TFR Refund
TFRRevenuesForRefund [Member]
TFRRevenuesForRefund
Entity Tax Identification Number
Entity Tax Identification Number
Percentage of Bondable Property Allowed
PercentageofBondablePropertyAllowed
PercentageofBondablePropertyAllowed
Retirement Plan Type [Axis]
Retirement Plan Type [Axis]
AOCI - Net gains (losses) on cash flow hedges
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
Public Utilities, Regulatory Proceeding [Axis]
Public Utilities, Regulatory Proceeding [Axis]
Income tax expense
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax
Values of open positions for derivative instruments [Table Text Block]
Schedule of Derivative Instruments [Table Text Block]
Accrued taxes
Taxes Payable, Current
Income
Earnings Per Share Reconciliation [Abstract]
Asset retirement obligations
Asset Retirement Obligations, Noncurrent
Senior Notes Due 2035A EM
Senior Notes Due 2035 And 5.78 EM [Member]
Senior Notes Due 2035 And 5.78 EM [Member]
Equity Components [Axis]
Equity Components [Axis]
Other
Other Assets, Current
Debt conversion terms one
DebtConversionTermsOne [Member]
Debt conversion terms one
Total Operating Expenses
Costs and Expenses
Receivable [Domain]
Receivable [Domain]
Sale of securities - trusts
Proceeds from Decommissioning Trust Fund Assets
Non-cash investing transactions:
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
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
Loss on derivative hedging instruments
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax
Summary of Bad Debt Expense
Accounts Receivable, Allowance for Credit Loss [Table Text Block]
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
Beginning of period
End of period
Total cash, cash equivalents and restricted cash
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents
Amortization of net gains included in net periodic benefit costs, net of tax
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax
Acquisition of Persimmon Creek, net of cash acquired
PaymentsToAcquirePersimmonCreekWindFarm1LLCNetOfCashAcquired
Payments to acquire Persimmon Creek Wind Farm 1 LLC, net of cash acquired
Net gain arising during period
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax
CURRENT ASSETS:
Assets, Current [Abstract]
Consolidation Items [Axis]
Consolidation Items [Axis]
Property, plant and equipment, adjustment
Property, Plant And Equipment, Adjustment
Property, Plant And Equipment, Adjustment
Interest of VIEs
Interest Paid, Including Capitalized Interest, Operating and Investing Activities
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Abstract]
Unrealized gains (losses)
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)
Warrant
Warrant [Member]
Security Exchange Name
Security Exchange Name
Debt Instrument, Basis Spread on Variable Rate
Debt Instrument, Basis Spread on Variable Rate
Related Party Transaction [Domain]
Related Party Transaction [Domain]
Reclassification out of Accumulated Other Comprehensive Income
Reclassification out of Accumulated Other Comprehensive Income [Member]
Less: Comprehensive income attributable to noncontrolling interest
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Plant to be constructed 2
JointlyOwnedElectricityGenerationPlantToBeConstructed2 [Member]
Jointly owned electricity generation plant to be constructed 2
Current State and Local Tax Expense (Benefit)
Current State and Local Tax Expense (Benefit)
Term Loan Facility Borrowings
Short-Term Debt
Fuel and purchased power
FuelAndPurchasedPower
Amount of operating expense for fuel and purchased power used by regulated operation
Decrease to base rates for fuel and purchased power pending approval
PublicUtilitiesDecreaseToBaseRatesForFuelAndPurchasedPowerPendingApproval
Public utilities decrease to base rates for fuel and purchased power pending approval
Income Taxes Payable
Income Taxes Payable [Member]
Income Taxes Payable [Member]
Right-of-use assets obtained in exchange for new finance lease liabilities
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets Disclosure [Abstract]
Convertible Notes Due 2027
ConvertibleNotesDue2027 [Member]
Convertible Notes Due 2027
Common stock - shares issued (in shares)
Common Stock, Shares, Issued
Plant to be constructed 1
JointlyOwnedElectricityGenerationPlantToBeConstructed1 [Member]
Jointly owned electricity generation plant to be constructed 1
Natural gas commodity contract
NaturalGasCommodityContract [Member]
Natural gas commodity contract
CWIP rider rate update interval
CWIPRiderRateUpdateInterval
CWIP rider rate update interval
Entity [Domain]
Entity [Domain]
Line of credit, maximum borrowing capacity
Line of Credit Facility, Maximum Borrowing Capacity
Total Other Assets
Regulated Entity, Other Assets, Noncurrent
Approved return on equity, percentage
Public Utilities, Approved Return on Equity, Percentage
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.
Corporate-owned life insurance
OtherNonoperatingIncomeExpenseWolfCreekCOLI
Other nonoperating income expense Wolf Creek COLI
Derivative Liability
Derivative Liability
Real estate securities fund
Real estate securities fund
Real Estate Funds [Member]
Accumulated depreciation
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
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]
Simple cycle natural gas plant to be constructed
SimpleCycleNaturalGasPlantToBeConstructed [Member]
Simple cycle natural gas plant to be constructed
Length of settlement
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period
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
Option contracts [Member]
Options Held [Member]
Common stock - shares authorized (in shares)
Common Stock, Shares Authorized
CWIP rider implementation commencement after plant construction onset
CWIPRiderImplementationCommencementAfterPlantConstructionOnset
CWIP rider implementation commencement after plant construction onset
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]
Offsetting Assets [Line Items]
Derivative Asset, Subject to Master Netting Arrangement, after Offset [Abstract]
Long-term Debt, Type [Axis]
Long-Term Debt, Type [Axis]
Annual wind farm revenue rate increase (decrease), requested
PublicUtilitiesRequestedRateIncreaseDecreaseAmountWindFarm
PublicUtilitiesRequestedRateIncreaseDecreaseAmountWindFarm
Supplemental Cash Flow Information
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
Entity Voluntary Filers
Entity Voluntary Filers
Defined Benefit Plan, Benefit Obligation, Special and Contractual Termination Benefits
Defined Benefit Plan, Benefit Obligation, Special and Contractual Termination Benefits
Related Party [Member]
Related Party [Member]
Recognized net actuarial gain
Defined Benefit Plan, Amortization of Gain (Loss)
Hedging Designation [Domain]
Hedging Designation [Domain]
Deferred Income Tax Expense (Benefit), Total
Deferred Income Tax Expense (Benefit)
Special termination benefits
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement
Write-offs
Accounts Receivable, Allowance for Credit Loss, Writeoff
Income Tax Contingency [Line Items]
Income Tax Contingency [Line Items]
Fair Value, Measurements, Recurring
Fair Value, Recurring [Member]
Senior Notes Series A due 2031 EMW
SeniorNotesSeriesADue2031EMW [Member]
Senior Notes Series A due 2031 EMW
Receivables, net of allowance for credit losses of $12.7 and $15.7, respectively
Receivables, net of allowance for credit losses of $5.5 and $7.8, respectively
Receivables, net of allowance for credit losses of $5.1 and $5.8, respectively
Total
Accounts Receivable, after Allowance for Credit Loss, Current
Debt Instrument, Convertible, Conversion Price
Debt Instrument, Convertible, Conversion Price
Stock Conversion Description [Axis]
Stock Conversion Description [Axis]
Ownership interest
Subsidiary, Ownership Percentage, Parent
Nuclear liability insurance, owners insurance, amount per incident
Nuclear Liability Insurance Owners Insurance Amount Per Incident
Nuclear Liability Insurance Owners Insurance Amount, Per Incident
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax
Senior Notes Due 2029 Evergy
Senior Notes Due 2029 Evergy [Member]
Senior Notes Due 2029 Evergy [Member]
Power commodity contract
PowerCommodityContract [Member]
Power commodity contract
Related party receivables
Accounts receivable from subsidiaries
Due from Related Party, Current
Accounts Receivable, before Allowance for Credit Loss, Current
Mortgage Bonds Due 2033 EKC
MortgageBondsDue2033EKC [Member]
Mortgage Bonds Due 2033 EKC
Payments for asset retirement obligations
Payments For Asset Retirement Obligations
Payments For Asset Retirement Obligations
Jointly owned utility plant, proportionate ownership share
Jointly Owned Utility Plant, Proportionate Ownership Share
Fair Value adjustment
Long-Term debt fair value adjustment
Long-TermDebtFairValueAdjustment [Member]
Long-Term debt fair value adjustment recorded in association with the merger.
Commercial Paper
Commercial Paper [Member]
Issuance of restricted common stock
Stock Issued During Period, Value, Restricted Stock Award, Gross
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
Issuance of restricted common stock (in shares)
Stock Issued During Period, Shares, Restricted Stock Award, Gross
Document Annual Report
Document Annual Report
Senior Notes Due 2025 EM
Senior Notes due 2025 EM [Member]
Senior Notes due 2025 KCPL [Member]
Derivative, Nonmonetary Notional Amount, Energy Measure
Derivative, Nonmonetary Notional Amount, Energy Measure
Public Utilities, Recovery Mechanism Percent for Fuel Cost
Public Utilities, Recovery Mechanism Percent for Fuel Cost
Public Utilities, Recovery Mechanism Percent for Fuel Cost
Derivative Instrument Detail [Abstract]
Derivative Instrument Detail [Abstract]
Accounting Policies [Abstract]
Accounting Policies [Abstract]
Unamortized investment tax credits
Accumulated Deferred Investment Tax Credit
Current Fiscal Year End Date
Current Fiscal Year End Date
Regulatory Asset [Domain]
Regulatory Asset [Domain]
Public Utilities, Approved Rate Increase Decrease, Amount, Wind Farm
PublicUtilitiesApprovedRateIncreaseDecreaseAmountWindFarm
Public utilities approved rate increase (decrease) amount wind farm
Actuarial gain
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Including Portion Attributable to Noncontrolling Interest [Member]
Transmission delivery charge
Transmission Delivery Charge [Member]
Transmission Delivery Charge [Member]
Contributions to plans remainder of year
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year
Pension and post-retirement liability
Liability, Defined Benefit Plan, Noncurrent
Regulatory liabilities
Regulatory Liability, Noncurrent
NotesDue2028EKC
NotesDue2028EKC [Member]
Notes Due 2028 EKC
Additional Paid-in Capital [Member]
Additional Paid-in Capital [Member]
Hedging Relationship [Axis]
Hedging Relationship [Axis]
Schedule of Receivables
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
PENSION PLANS AND POST-RETIREMENT BENEFITS
Retirement Benefits [Text Block]
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
Short-term Debt [Line Items]
Short-Term Debt [Line Items]
Regulatory Liability [Axis]
Regulatory Liability [Axis]
Class of Stock [Axis]
Class of Stock [Axis]
EIRR Bonds Due 2038 EM
EIRR Bonds Due 2038 EM [Member]
EIRR Bonds Due 2038 EM
Entity Interactive Data Current
Entity Interactive Data Current
Defined benefit pension plans
Defined Benefit Pension Plans [Abstract]
Defined Benefit Pension Plans [Abstract]
Price Risk Derivatives [Abstract]
Price Risk Derivatives [Abstract]
Mortgage Bonds Due 2026 EKC
MortgageBondsDue2026EKC [Member]
Mortgage Bonds Due 2026 EKC [Member]
Schedule of Fair Value of Assets and Liabilities
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Disaggregation of Revenue [Table]
Disaggregation of Revenue [Table]
Stock compensation
Share-Based Payment Arrangement, Noncash Expense
NAV
Fair Value Measured at Net Asset Value Per Share [Member]
Credit Derivative [Table]
Credit Derivative [Table]
FIN 39 Derivative liability netting
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset
Interest rate
Interest rate
Debt Instrument, Interest Rate, Stated Percentage
Residential
Electric Utility Customer Class Residential [Member]
Residential customer class from which revenues are generated by the regulated sale of electricity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Cash paid for (received from):
Supplemental Cash Flow Information [Abstract]
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]
Additional Collateral, Aggregate Fair Value
Additional Collateral, Aggregate Fair Value
Defined benefit plan basis point change in discount rate
DefinedBenefitPlanChangeInDiscountRate
DefinedBenefitPlanChangeInDiscountRate
Derivative Instruments, Gain (Loss) [Table Text Block]
Derivative Instruments, Gain (Loss) [Table Text Block]
Total Other Income (Expense), Net
Total other income (expense), net
Total Other Expense, Net
Nonoperating Income (Expense)
Reclassification out of Accumulated Other Comprehensive Income [Domain]
Reclassification out of Accumulated Other Comprehensive Income [Domain]
Auditor Firm ID
Auditor Firm ID
Effective Income Tax Rate Reconciliation, Percent, Total
Effective Income Tax Rate Reconciliation, Percent
Payment for settlement of interest rate swap accounted for as a cash flow hedge
Payments for Hedge, Financing Activities
INCOME FROM OPERATIONS
Operating Income (Loss)
Restrictions on Cash and Cash Equivalents [Table]
Restrictions on Cash and Cash Equivalents [Table]
Collateralized note payable
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount
Purchase of securities - trusts
Payments to Acquire Investments to be Held in Decommissioning Trust Fund
Number of segments
Number of Reportable Segments
TOTAL LIABILITIES AND EQUITY
Liabilities and Equity
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Axis]
Hedging Designation [Axis]
Hedging Designation [Axis]
Derivative Liability, Current
Derivative Liability, Current
DERIVATIVE INSTRUMENTS
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Early-Stage Clean Energy and Energy Solution Investments
Early-Stage Clean Energy and Energy Solution Investments [Member]
Early-Stage Clean Energy and Energy Solution Investments
Regulated Operations [Abstract]
Regulated Operations [Abstract]
Annual revenue rate increase (decrease), requested
Public Utilities, Requested Rate Increase (Decrease), Amount
Cash dividends paid
Payments of Dividends
Right-of-use assets obtained in exchange for new operating lease liabilities
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability
Expected return on plan assets
Defined Benefit Plan, Expected Return (Loss) on Plan Assets
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 retirement obligations
Asset Retirement Obligation, Current
AOCI
AOCI Attributable to Parent [Member]
Senior Notes Due 2024
Senior Notes 2.45 Percent Series Due 2024 [Member]
Senior Notes 2.45 Percent Series Due 2024 [Member]
AEP Transmission Holding Company, LLC
AEP Transmission Holding Company, LLC [Member]
AEP Transmission Holding Company, LLC
Schedule of Regulatory Assets
Schedule of Regulatory Assets [Table Text Block]
Industry aggregate limit for non nuclear insurance
Industry Aggregate Limit For Non Nuclear Insurance
Industry Aggregate Limit For Non NuclearInsuarnce
Nuclear decommissioning trust - debt securities
Decommissioning Trust Assets - Debt [Member]
Decommissioning Trust Assets - Debt [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment [Line Items]
Statement [Line Items]
Statement [Line Items]
Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net
Derivative Asset, Fair Value, Gross Asset
Derivative Asset, Subject to Master Netting Arrangement, after Offset and Deduction [Abstract]
Schedule of Related Party Receivables and Payables
Schedule of Related Party Transactions [Table Text Block]
Fuel inventory
Energy Related Inventory, Coal
Schedule of Fair Value Investments, Entities that Calculate NAV
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table Text Block]
Summary of Property, Plant and Equipment
Property, Plant and Equipment [Table Text Block]
Operating Expenses and Capital Costs Billed
Operating Expenses And Capital Costs Billed [Member]
Operating Expenses and Capital Costs Billed [Member]
Unamortized debt discount and debt issuance costs
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net
Junior Subordinated Debt
Junior Subordinated Debt [Member]
Minimum
Minimum [Member]
Debt conversion terms two
DebtConversionTermsTwo [Member]
DebtConversionTermsTwo
Related Party Transactions [Abstract]
Related Party Transactions [Abstract]
Amortization of deferred refueling outage
Amortization Of Deferred Refueling Outage Costs
Amortization Of Deferred Refueling Outage Costs
Income from sale of commercial solar project
IncomeFromSaleOfCommercialSolarProject
Income from sale of commercial solar project
Pollution Control Bonds Due 2032B EKC
Pollution Control Bonds Due 2032B EKC [Member]
Pollution Control Bonds Due 2032B EKC [Member]
Credit loss expense
Accounts Receivable, Credit Loss Expense (Reversal)
Variable Interest Entity [Line Items]
Variable Interest Entity [Line Items]
Segments [Axis]
Segments [Axis]
Mortgage Bonds Due 2050 EKC
Mortgage Bonds Due 2050 EKC [Member]
Mortgage Bonds Due 2050 EKC [Member]
Regulatory Asset, Amortization Period
Regulatory Asset, Amortization Period
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Derivative, by Nature [Axis]
Derivative Instrument [Axis]
Derivative Instrument [Axis]
Inventory [Line Items]
Inventory [Line Items]
Long-term debt gross
Long-term debt gross
Long-Term Debt, Gross
Commodity contract noncurrent
CommodityContractNoncurrent [Member]
Commodity contract noncurrent
Wolf Creek
Wolf Creek Unit
Jointly Owned Nuclear Power Plant [Member]
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 Deferred Income Tax Assets and Liabilities
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Issuance of restricted common stock
AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsIssuance
Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Issuance
Customer accounts receivable
Trade Accounts Receivable [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]
GOODWILL
Goodwill and Intangible Assets Disclosure [Text Block]
Evergy, Inc. Shareholders' Equity:
Evergy, Inc. Shareholders' Equity:
Equity, Attributable to Parent [Abstract]
Evergy Metro, Inc., Subsidiary
Subsidiaries [Member]
Core bond fund
Core Bond Fund [Member]
Core Bond Fund [Member]
Derivative Asset, Statement of Financial Position [Extensible Enumeration]
Derivative Asset, Statement of Financial Position [Extensible Enumeration]
Basis of Presentation
Basis of Presentation and Significant Accounting Policies [Text Block]
FIN 39 Derivative asset netting
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset [Abstract]
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Abstract]
Entities [Table]
Entities [Table]
Post-Retirement Benefits
Other Postretirement Benefits Plan [Member]
Statement of Stockholders' Equity [Abstract]
Statement of Stockholders' Equity [Abstract]
Amortization of corporate-owned life insurance
Amortization Of Corporate Owned Life Insurance
Amortization Of Corporate Owned Life Insurance
Receivables [Abstract]
Receivables [Abstract]
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
Estimates Of Environmental Financial Impact And Related Issues [Table]
Estimates Of Environmental Financial Impact And Related Issues [Table]
Kansas Sky solar plant to be constructed
KansasSkySolarPlantToBeConstructed [Member]
Kansas Sky solar plant to be constructed
Mortgage Bonds Due 2037 EKS
MortgageBondsDue2037EKS [Member]
Mortgage Bonds Due 2037 EKS [Member]
Summary Of Accounting Policies [Table]
Summary Of Accounting Policies [Table]
Summary Of Accounting Policies [Table]
Operating and maintenance
Utilities Operating Expense, Maintenance and Operations
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
Assets
Assets, Fair Value Disclosure [Abstract]
Issuance of stock for compensation and reinvested dividends
Stock Issued
Related Party [Domain]
Related and Nonrelated Parties [Domain]
Total Long-Term Liabilities
Liabilities, Noncurrent
Commodity contract current
CommodityContractCurrent [Member]
Commodity contract current
Nuclear liability insurance, industry wide retrospective assessment program
Nuclear Liability Insurance Industry Wide Retrospective Assessment Program
Nuclear Liability Insurance Industry Wide Retrospective Assessment Program
Deferred income taxes
Deferred Income Tax Liabilities, Net
Unrealized Gain on Investments
Unrealized Gain (Loss) on Investments
Interest Charges [Member]
Interest Expense [Member]
Changes in other assets
Increase (Decrease) in Other Operating Assets
Non-cash financing transactions:
Other Noncash Investing and Financing Items [Abstract]
Change in unrecognized pension expense, net of tax
Change in unrecognized pension expense, net of tax
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax
Deferred Federal Income Tax Expense (Benefit)
Deferred Federal Income Tax Expense (Benefit)
Nuclear decommissioning trust
Decommissioning Fund Investments
Cash and Cash Equivalents
Cash and Cash Equivalents, Policy [Policy Text Block]
Jeffrey Energy Center
Jeffrey Energy Center [Member]
Jeffrey Energy Center [Member]
COMMITMENTS AND CONTINGENCIES
Commitments and Contingencies Disclosure [Text Block]
Asset Class [Domain]
Asset Class [Domain]
Issuance of stock, net of issuance costs (in shares)
Stock Issued During Period, Shares, New Issues
Unfunded Commitments
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments
Senior Notes Series B due 2033 EMW
SeniorNotesSeriesB3.01PercentDue2033EMW [Member]
Senior Notes Series B 3.01 percent due 2033 EMW
Entity Emerging Growth Company
Entity Emerging Growth Company
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.
Total Liabilities
Liabilities, Fair Value Disclosure
Maximum amount of outstanding principal under receivables agreement
Maximum Amount Of Outstanding Principal Under Receivables Agreement
Maximum amount of outstanding principal under receivables agreement
Derivative, Fair Value, Net [Abstract]
Derivative, Fair Value, Net [Abstract]
Mortgage Bonds Due 2027 EKC
MortgageBondsDue2027EKC [Member]
Mortgage Bonds Due 2027 EKC [Member]
Mortgage Bonds Due 2038 EKS
MortgageBondsDue2038EKS [Member]
Mortgage Bonds Due 2038 EKS [Member]
Equity Component [Domain]
Equity Component [Domain]
Flow through depreciation for plant-related differences
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.
Amounts reclassified from accumulated other comprehensive loss
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, Tax [Abstract]
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, Tax [Abstract]
Entity Shell Company
Entity Shell Company
Entity Incorporation, State or Country Code
Entity Incorporation, State or Country Code
Evergy Companies
EvergyCompanies [Member]
Evergy Companies
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
2024 Rate case proceedings
A2024RateCaseProceedings [Member]
A2024 Rate case proceedings
Letters of Credit
Standby Letters of Credit [Member]
Statement [Table]
Statement [Table]
Counterparty Name [Axis]
Counterparty Name [Axis]
Measurement Frequency [Domain]
Measurement Frequency [Domain]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Significant Accounting Policies [Text Block]
Consolidation Items [Domain]
Consolidation Items [Domain]
Other
Other Revenue
Revenue other than from contracts with customers.
Derivatives Not Designated as Hedging Instruments [Table Text Block]
Derivatives Not Designated as Hedging Instruments [Table Text Block]
Geographic Distribution [Domain]
Geographic Distribution [Domain]
Interest, net of amount capitalized
Interest Paid, Excluding Capitalized Interest, Operating Activities
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration]
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration]
Level 1
Fair Value, Inputs, Level 1 [Member]
ApproximateMWNameplateCapacity
ApproximateMWNameplateCapacity
Approximate MW Nameplate Capacity
Total Current Assets
Assets, Current
Statement of Cash Flows [Abstract]
Statement of Cash Flows [Abstract]
Senior Notes
Senior Notes
Senior Notes [Member]
Mortgage Bonds Due 2043 EKC
MortgageBondsDue2043AEKC [Member]
Mortgage Bonds Due 2043A EKC [Member]
AFUDC equity
EffectiveIncomeTaxRateReconciliationAFUDCEquity
Effective Income Tax Rate Reconciliation, AFUDC Equity
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-Term Debt Instruments [Table]
Contributions by employer
Defined Benefit Plan, Plan Assets, Contributions by Employer
Accumulated other comprehensive loss over the next twelve months
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net
Equity funds
Other Equity Fund [Member]
Other Equity Fund
Entity Well-known Seasoned Issuer
Entity Well-known Seasoned Issuer
TAXES
Income Tax Disclosure [Text Block]
COLI policies
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Life Insurance, Percent
Summary of Operating Loss Carryforwards
Summary of Operating Loss Carryforwards [Table Text Block]
Short-term debt, net
Proceeds from (Repayments of) Short-Term Debt
Cash Flows from Financing Activities
Net Cash Provided by (Used in) Financing Activities
Amount of CWIP recovery, percentage
AmountOfCWIPRecoveryPercentage
Amount of CWIP recovery, percentage
Credit Facility [Axis]
Credit Facility [Axis]
Derivative, Fair Value, Amount Offset Against Collateral, Net [Abstract]
Derivative, Fair Value, Amount Offset Against Collateral, Net [Abstract]
Long-term debt
Long-Term Debt, Fair Value
Loss Contingencies by Nature of Contingency [Axis]
Loss Contingency Nature [Axis]
Entity Registrant Name
Entity Registrant Name
Offsetting Derivative Liabilities [Abstract]
Offsetting Derivative Liabilities [Abstract]
Reclassification out of Accumulated Other Comprehensive Income [Axis]
Reclassification out of Accumulated Other Comprehensive Income [Axis]
Deferred State and Local Income Tax Expense (Benefit)
Deferred State and Local Income Tax Expense (Benefit)
Recommended increase (decrease) to revenues
Recommended increase (decrease) to revenues
Amount of rate increase (decrease) recommended by staff of the state commission.
Level 2
Fair Value, Inputs, Level 2 [Member]
Offsetting Assets [Table]
Offsetting Assets [Table]
EQUITY:
Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Disaggregation of Revenue
Disaggregation of Revenue [Table Text Block]
Issuance of common stock, net of issuance costs
Stock Issued During Period, Value, New Issues
Principles of Consolidation
Consolidation, Policy [Policy Text Block]
Mortgage Bonds Due 2049 EM
Mortgage Bonds Due 2049 Evergy Metro [Member]
Mortgage Bonds Due 2049 Evergy Metro [Member]
Title of 12(b) Security
Title of 12(b) Security
Combination debt/equity/other fund
Debt Equity Other Fund [Member]
Debt Equity Other Fund [Member]
Common stock
Common Stock, Value, Issued
Document Financial Statement Error Correction [Flag]
Document Financial Statement Error Correction [Flag]
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.
Mortgage Bonds Due 2044 EKS
MortgageBondsDue2044EKS [Member]
Mortgage Bonds Due 2044 EKS [Member]
Contributions to plans in next year
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year
Regulatory assets, includes $286.3 and $294.5 related to variable interest entity, respectively
Regulatory assets
Regulatory Asset, Noncurrent
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
Support
SupportCosts
Support Costs
State income taxes
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent
Regulatory liabilities
Regulatory Liability, Current
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]
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES:
Net Cash Provided by (Used in) Financing Activities [Abstract]
Regulatory liabilities
Regulatory Liability
Share forward agreement
Forward Contracts [Member]
Basic earnings per common share (in dollars per share)
Earnings Per Share, Basic
Earnings Per Share, Basic
Issuance of common stock
Proceeds from Issuance of Common Stock
Cash and cash equivalents
Cash and Cash Equivalents [Member]
Ownership [Domain]
Ownership [Domain]
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.
Dividends Payable [Line Items]
Dividends Payable [Line Items]
Total Current Liabilities
Liabilities, Current
Commercial
Electric Utility Customer Class Commercial [Member]
Commercial customer class from which revenues are generated by the regulated sale of electricity [Member]
Mortgage Bonds Due 2032 EMW
Mortgage Bonds Due 2032 EMW [Member]
Mortgage Bonds Due 2032 EMW
Rate-making equity ratio, requested
Public Utilities, Requested Equity Capital Structure, Percentage
Line of credit
Long-Term Line of Credit
AFUDC equity
AFUDCEquityNonOperatingIncome
AFUDC equity non operating income
U.S. Treasury
US Treasury and Government [Member]
Net gain arising during period, net of tax
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax
Senior Notes Due 2047 EM
Senior Notes Due 2047 EM [Member]
Senior Notes Due 2047 EM
Supplies
Energy Related Inventory, Supplies
Energy Related Inventory, Supplies
Regulatory Proceedings [Line Items]
Public Utilities, General Disclosures [Line Items]
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.
Credit Derivatives [Line Items]
Credit Derivatives [Line Items]
OPERATING REVENUES
OPERATING REVENUES
Revenues
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger
Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]
Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]
EIRR Bonds Series 2007A and 2007B due 2038 EM
EERR Bonds 2875 Percent Series 2008 EM [Member]
2.875 percent EIRR bonds due 2008 EM.
Asset Acquisition, Consideration Transferred
Asset Acquisition, Consideration Transferred
Entity Address, City or Town
Entity Address, City or Town
Recoveries of prior write-offs
Accounts Receivable, Allowance for Credit Loss, Recovery
Proceeds from long-term debt
Proceeds from Issuance of Long-Term Debt
Schedule of Carrying Value and Fair Value of Debt Instruments
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]
Mortgage Bonds Due 2030 EM
Mortgage Bonds Due 2030 EM [Member]
Mortgage Bonds Due 2030 EM
Natural gas commodity contract current
NaturalGasCommodityContractCurrent [Member]
Natural gas commodity contract current
Industrial
Electric Utility Customer Class Industrial [Member]
Industrial customer class from which revenues are generated by the regulated sale of electricity [Member]
Derivative hedging activity, net of tax
Derivative hedging activity, net of tax
Derivative hedging activity, net of tax
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax
REVENUE
Revenue from Contract with Customer [Text Block]
Document Fiscal Year Focus
Document Fiscal Year Focus
Other income
OtherNonOperatingIncomeOther
Other non operating income, other
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
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]
Total Assets
Assets, Fair Value Disclosure
Document Period End Date
Document Period End Date
Derivative Liability, Alternative [Abstract]
Derivative Liability, Alternative [Abstract]
VIE ownership percentage
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage
Rabbi trust:
Rabbi trusts - equity securities
Rabbi Trusts [Member]
Rabbi Trusts [Member]
Schedule of Net Funded Status
Schedule of Net Funded Status [Table Text Block]
Asset Class [Axis]
Asset Class [Axis]
Accounts receivable pledged as collateral
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount
Senior Notes Due 2035 EM
Senior notes due 2035 EM [Member]
Senior notes due 2035 EM.
Nuclear liability insurance, owners property insurance assessment, maximum
Nuclear Liability Insurance Owners Property Insurance Assessment Maximum
Nuclear Liability Insurance Owners Property Insurance Assessment Maximum
Prepaid expenses
Prepaid Expense and Other Assets, Current
Document Transition Report
Document Transition Report
Summary Of Accounting Policies [Line Items]
Summary Of Accounting Policies [Line Items]
[Line Items] for Summary Of Accounting Policies [Table]
Fair Value, Recurring and Nonrecurring [Table]
Fair Value, Recurring and Nonrecurring [Table]
Customer [Domain]
Customer [Domain]
Entity Current Reporting Status
Entity Current Reporting Status
Retained earnings
Retained Earnings [Member]
Other receivables, contracts with customers
Other Receivables, Contracts With Customers
The amount of other receivables resulting from contracts with customers.
Asset Acquisition [Domain]
Asset Acquisition [Domain]
Transource Energy, LLC
Transource Energy, LLC [Member]
Transource Energy, LLC
RSUs
Restricted Stock Units (RSUs) [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Medium Term Notes
Medium-Term Note [Member]
Total
InvestmentTaxCreditTotalNet
Investment Tax Credit Total Net
Schedule of Components of Income Tax Expense (Benefit)
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Statement of Income Location, Balance [Domain]
Statement of Income Location, Balance [Domain]