LONG-TERM DEBT - Narrative (Details) - USD ($) $ in Millions	Apr. 30, 2024	Mar. 31, 2024	Feb. 28, 2024
Debt Instrument [Line Items]
Interest rate		5.06%
Commercial Paper | Commercial paper reclassified as noncurrent debt
Debt Instrument [Line Items]
Long-term debt gross		$ 292.8
Evergy Metro | Subsequent Event | Secured Debt | MortgageBondsDue2034
Debt Instrument [Line Items]
Long-term debt gross	$ 300.0
Interest rate	5.40%
Evergy Missouri West | SecuritizedBondsDue2040EMW [Member]
Debt Instrument [Line Items]
Long-term debt gross			$ 331.1
Evergy Missouri West | Securitized Bonds | SecuritizedBondsDue2040EMW [Member]
Debt Instrument [Line Items]
Long-term debt gross			$ 331.1
Interest rate			5.10%