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ASSET RETIREMENT OBLIGATIONS - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2023
Jointly Owned Utility Plant Interests [Line Items] |  |  |
Increase to ARO to decommission Wolf Creek resulting from study | $ 3.2 |  |
Liabilities incurred during the year | $ 9.7 | $ 0.0 |
Wolf Creek Unit |  |  |
Jointly Owned Utility Plant Interests [Line Items] |  |  |
Jointly owned utility plant, proportionate ownership share | 94.00% |  | 94.00%
Evergy Kansas Central |  |  |
Jointly Owned Utility Plant Interests [Line Items] |  |  |
Increase to ARO to decommission Wolf Creek resulting from study | $ 1.6 |  |
Liabilities incurred during the year | $ 9.7 | 0.0 |
Evergy Kansas Central | Wolf Creek Unit |  |  |
Jointly Owned Utility Plant Interests [Line Items] |  |  |
Jointly owned utility plant, proportionate ownership share | 47.00% |  | 47.00%
Evergy Metro |  |  |
Jointly Owned Utility Plant Interests [Line Items] |  |  |
Increase to ARO to decommission Wolf Creek resulting from study | $ 1.6 |  |
Liabilities incurred during the year | $ 0.0 | $ 0.0 |
Evergy Metro | Wolf Creek Unit |  |  |
Jointly Owned Utility Plant Interests [Line Items] |  |  |
Jointly owned utility plant, proportionate ownership share | 47.00% |  | 47.00%

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