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TAXES - Tax Credit Carryforwards (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | $ 284.1 |
Operating loss carryforwards of federal income tax benefit | 7.1 |
Evergy Kansas Central |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 237.9 |
Evergy Metro |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 43.6 |
General Business Tax Credit Carryforward |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 284.1 | $ 311.0
Amount of tax credit acquired in business combination | 0.1 |
General Business Tax Credit Carryforward | Evergy Kansas Central |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 237.9 | 226.9
General Business Tax Credit Carryforward | Evergy Metro |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 43.6 | $ 77.6
State and Local Jurisdiction |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 4.8 |
Operating loss carryforwards of federal income tax benefit | 2.7 |
State and Local Jurisdiction | Evergy Kansas Central |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 4.8 |
Operating loss carryforwards of federal income tax benefit | 2.7 |
Tax Year 2007 [Member] |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 0.1 |
Tax Year 2007 [Member] | Evergy Kansas Central |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 0.0 |
Tax Year 2007 [Member] | Evergy Metro |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 0.0 |
Tax Year 2016 [Member] |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 8.5 |
Tax Year 2016 [Member] | Evergy Kansas Central |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 3.2 |
Tax Year 2016 [Member] | Evergy Metro |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 4.6 |
Tax Year 2017 [Member] |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 44.0 |
Tax Year 2017 [Member] | Evergy Kansas Central |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 34.9 |
Tax Year 2017 [Member] | Evergy Metro |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 8.4 |
2018 |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 43.9 |
2018 | Evergy Kansas Central |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 36.3 |
2018 | Evergy Metro |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 7.5 |
2019 |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 37.7 |
2019 | Evergy Kansas Central |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 30.9 |
2019 | Evergy Metro |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 6.7 |
2020 |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 35.9 |
2020 | Evergy Kansas Central |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 28.4 |
2020 | Evergy Metro |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 7.4 |
Tax Year 2021 |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 31.9 |
Tax Year 2021 | Evergy Kansas Central |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 28.1 |
Tax Year 2021 | Evergy Metro |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 3.7 |
Tax Year 2022 [Member] |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 34.8 |
Tax Year 2022 [Member] | Evergy Kansas Central |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 31.7 |
Tax Year 2022 [Member] | Evergy Metro |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 2.6 |
Tax Year 2023 |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 47.3 |
Tax Year 2023 | Evergy Kansas Central |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | 44.4 |
Tax Year 2023 | Evergy Metro |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforward, amount | $ 2.7 |

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- Definition The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-2 + Details
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- Definition The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-3 + Details
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