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Public utilities, estimated annual transmissions revenue amount of increase (decrease) over prior year

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Public Utilities Estimated Refund On Earnings Over Approved Return On Equity

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Public Utilities, Recovery Mechanism Percent for Fuel Cost

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Public Utilities, Recovery Mechanism's Sharing Percentage for Fuel Cost

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Public Utilities, Refund Percent On Earnings Over Approved Return On Equity

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Public utilities requested application of carrying charges percentage

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PublicUtilitiesRequestedRateIncreaseDecreaseAmountNotIncludingRebasingFuelPurchasedPowerExpenseAndPropertyTaxExpense

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Public utilities requested rate increase decrease amount rebasing fuel purchased power expense proprty tax and credit loss expense tracker storm reserve and return on unrecovered investment

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Public Utilities Requested Increase of Recovery

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Public Utilities, Requested Refund Increase (Decrease), Amount

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Amount of public utility's approved rate increase (decrease) by regulatory agency.

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Percentage of public utility's approved return on equity.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Percentage of public utility's requested equity to capital, including debt and equity.

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Percentage of public utility's requested return on equity.

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The amount for the individual regulatory asset as itemized in a table of regulatory assets as of the end of the period.

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The amount for the individual regulatory liability as itemized in a table of regulatory liabilities as of the end of the period.

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RATE MATTERS AND REGULATION - Narrative (Details) $ in Millions	1 Months Ended					3 Months Ended
	May 31, 2022 USD ($)	Apr. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Jan. 31, 2022 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Evergy Metro \| Missouri Public Service Commission
Regulatory Proceedings [Line Items]
Public Utilities, Recovery Mechanism Percent for Fuel Cost						0.95
Public Utilities, Recovery Mechanism's Sharing Percentage for Fuel Cost						0.05
Evergy Missouri West \| Missouri Public Service Commission
Regulatory Proceedings [Line Items]
Public Utilities, Recovery Mechanism Percent for Fuel Cost						0.95
Public Utilities, Recovery Mechanism's Sharing Percentage for Fuel Cost						0.05
Transmission delivery charge \| Evergy Kansas Central \| Kansas Corporation Commission
Regulatory Proceedings [Line Items]
Annual revenue increase (decrease) approved			$ 20.4
2018 Rate Case Proceedings \| Evergy Kansas Central \| Kansas Corporation Commission
Regulatory Proceedings [Line Items]
Refund percent on earnings over approved return on equity						0.50
Approved return on equity, percentage						9.30%
Estimated refund on earnings over approved return on equity			0.0			$ 0.0
2018 Rate Case Proceedings \| Evergy Metro \| Kansas Corporation Commission
Regulatory Proceedings [Line Items]
Refund percent on earnings over approved return on equity						0.50
Approved return on equity, percentage						9.30%
Estimated refund on earnings over approved return on equity			0.0			$ 0.0
2022 Rate case proceedings \| Evergy Metro
Regulatory Proceedings [Line Items]
Return on equity, requested				10.00%
Annual revenue increase (decrease), requested, not including rebasing fuel, purchased power expense and/or property tax expense				$ 43.9
Rate-making equity ratio, requested				51.19%
Annual revenue increase (decrease) related to rebasing, property tax and credit loss expense, storm reserve and return on unrecovered investment				$ 3.8
2022 Rate case proceedings \| Evergy Missouri West
Regulatory Proceedings [Line Items]
Return on equity, requested				10.00%
Annual revenue increase (decrease), requested, not including rebasing fuel, purchased power expense and/or property tax expense				$ 27.7
Rate-making equity ratio, requested				51.81%
Annual revenue increase (decrease) related to rebasing, property tax and credit loss expense, storm reserve and return on unrecovered investment				$ 32.1
2018 MPSC OPC MECG Petition
Regulatory Proceedings [Line Items]
Estimated loss contingency portion not accrued (up to)						50.0
2018 MPSC OPC MECG Petition \| Revenues probable of refund
Regulatory Proceedings [Line Items]
Regulatory liabilities			32.0			32.0	$ 29.3
FERC 2022 TFR Proceeding \| Evergy Kansas Central \| Federal Energy Regulatory Commission
Regulatory Proceedings [Line Items]
Annual transmissions revenue estimated amount of increase (decrease) over prior year						33.2
FERC 2022 TFR Proceeding \| Evergy Metro \| Federal Energy Regulatory Commission
Regulatory Proceedings [Line Items]
Annual transmissions revenue estimated amount of increase (decrease) over prior year						18.1
FERC 2021 TFR Proceeding \| Evergy Kansas Central \| Federal Energy Regulatory Commission
Regulatory Proceedings [Line Items]
Annual transmissions revenue estimated amount of increase (decrease) over prior year						32.4
FERC 2021 TFR Proceeding \| Evergy Metro \| Federal Energy Regulatory Commission
Regulatory Proceedings [Line Items]
Annual transmissions revenue estimated amount of increase (decrease) over prior year						(3.9)
2021 KCC Winter Weather AAO \| Evergy Kansas Central \| February 2021 winter weather event
Regulatory Proceedings [Line Items]
Regulatory assets			122.7			122.7	121.5
2021 KCC Winter Weather AAO \| Evergy Metro \| February 2021 winter weather event
Regulatory Proceedings [Line Items]
Regulatory liabilities			38.1			38.1	39.5
2021 MPSC Winter Weather \| Evergy Metro
Regulatory Proceedings [Line Items]
Public Utilities, Requested Refund Increase (Decrease), Amount					$ (5.0)
2021 MPSC Winter Weather \| Evergy Metro \| February 2021 winter weather event
Regulatory Proceedings [Line Items]
Regulatory liabilities			25.4			25.4	25.6
2021 MPSC Winter Weather \| Evergy Missouri West
Regulatory Proceedings [Line Items]
Public Utilities Requested Increase of Recovery					$ 15.0
2021 MPSC Winter Weather \| Evergy Missouri West \| February 2021 winter weather event
Regulatory Proceedings [Line Items]
Regulatory assets			$ 281.8			$ 281.8	$ 281.6
Subsequent Event \| Transmission delivery charge \| Evergy Metro \| Kansas Corporation Commission
Regulatory Proceedings [Line Items]
Annual revenue increase (decrease) approved	$ 7.9
Subsequent Event \| 2021 KCC Winter Weather AAO \| Evergy Kansas Central
Regulatory Proceedings [Line Items]
Carrying charges application rate		1.00%
Subsequent Event \| 2021 KCC Winter Weather AAO \| Evergy Metro
Regulatory Proceedings [Line Items]
Public Utilities, Requested Refund Increase (Decrease), Amount		$ (5.0)
Carrying charges application rate		1.00%