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PENSION PLANS AND POST-RETIREMENT BENEFITS - Expected Future Services (Details) $ in Millions | Dec. 31, 2023 USD ($)
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Pension Benefits |
Defined Benefit Plan Disclosure [Line Items] |
2024 | $ 135.6
2025 | 136.5
2026 | 138.9
2027 | 140.4
2028 | 141.1
2029-2033 | 707.7
Post-Retirement Benefits |
Defined Benefit Plan Disclosure [Line Items] |
2024 | 18.2
2025 | 17.6
2026 | 17.1
2027 | 15.2
2028 | 14.4
2029-2033 | 66.3
Evergy Kansas Central | Pension Benefits |
Defined Benefit Plan Disclosure [Line Items] |
2024 | 74.4
2025 | 73.5
2026 | 72.9
2027 | 72.4
2028 | 71.5
2029-2033 | 344.0
Evergy Kansas Central | Post-Retirement Benefits |
Defined Benefit Plan Disclosure [Line Items] |
2024 | 10.3
2025 | 9.9
2026 | 9.4
2027 | 8.2
2028 | 7.8
2029-2033 | 35.0
Evergy Metro | Pension Benefits |
Defined Benefit Plan Disclosure [Line Items] |
2024 | 59.6
2025 | 61.4
2026 | 64.4
2027 | 66.5
2028 | 68.1
2029-2033 | 356.5
Evergy Metro | Post-Retirement Benefits |
Defined Benefit Plan Disclosure [Line Items] |
2024 | 7.8
2025 | 7.8
2026 | 7.7
2027 | 7.0
2028 | 6.6
2029-2033 | $ 31.3

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