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SHAREHOLDERS' EQUITY - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Apr. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2023 | Feb. 28, 2021
Line of Credit Facility [Line Items] |  |  |  |
Preferred stock, shares authorized (in shares) |  |  | 12,000,000 |
Stock to be Sold and Issued Under Securities Purchase Agreement, Shares |  |  |  | 2,269,447
Stock to be Sold and Issued Under Securities Purchase Agreement, Value |  |  |  | $ 113.2
Warrant to be Issued Under Securities Purchase Agreement for Potential Shares, Maximum |  |  |  | 3,950,000
Class of Warrant or Right, Exercise Price of Warrants or Rights |  |  |  | $ 64.70
Restriction on payment of dividends (at least) |  |  | 35.00% |
Restricted net assets of subsidiaries |  |  | $ 6,300.0 |
Issuance of stock, net of issuance costs | $ 112.5 | $ 112.5 |  |
Stock issuance costs | $ 0.7 |  |  |
Evergy Kansas Central |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Restriction on payment of dividends (at least) |  |  | 40.00% |
Retained earnings restrictions |  |  | $ 316.0 |
Evergy Metro |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Restriction on payment of dividends (at least) |  |  | 40.00% |
Retained earnings restrictions |  |  | $ 466.8 |

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