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VARIABLE INTEREST ENTITIES - Narrative (Details) - USD ($)
$ in Millions
Mar. 31, 2024
Feb. 28, 2024
Variable Interest Entity [Line Items]    
Interest rate 5.06%  
Evergy Missouri West | SecuritizedBondsDue2040EMW [Member]    
Variable Interest Entity [Line Items]    
Long-term debt gross   $ 331.1
Evergy Missouri West | SecuritizedBondsDue2040EMW [Member] | Securitized Bonds    
Variable Interest Entity [Line Items]    
Long-term debt gross   $ 331.1
Interest rate   5.10%