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COMMITMENTS AND CONTINGENCIES - Narrative (Details)
$ in Millions
Dec. 31, 2023
USD ($)
Estimates Of Environmental Financial Impact And Related Issues [Line Items]  
Industry aggregate limit for nuclear insurance $ 3,200.0
Industry aggregate limit for non nuclear insurance 1,800.0
Nuclear liability insurance, full limit of public liability 16,300.0
Nuclear liability insurance, maximum available commercial insurance 500.0
Nuclear liability insurance, industry wide retrospective assessment program 15,800.0
Nuclear liability insurance, owners insurance amount, maximum 165.9
Nuclear liability insurance, owners insurance, amount per incident 24.7
Nuclear liability insurance, owners property insurance, maximum 2,800.0
Nuclear liability insurance, owners nonnuclear property insurance, maximum 2,300.0
Nuclear liability insurance, owners property insurance assessment, maximum 29.1
Evergy  
Estimates Of Environmental Financial Impact And Related Issues [Line Items]  
Nuclear liability insurance, owners insurance amount, maximum 156.0
Nuclear liability insurance, owners insurance, amount per incident 23.2
Nuclear liability insurance, owners property insurance assessment, maximum 27.4
Evergy Kansas Central  
Estimates Of Environmental Financial Impact And Related Issues [Line Items]  
Nuclear liability insurance, owners insurance amount, maximum 78.0
Nuclear liability insurance, owners insurance, amount per incident 11.6
Nuclear liability insurance, owners property insurance assessment, maximum 13.7
Evergy Metro  
Estimates Of Environmental Financial Impact And Related Issues [Line Items]  
Nuclear liability insurance, owners insurance amount, maximum 78.0
Nuclear liability insurance, owners insurance, amount per incident 11.6
Nuclear liability insurance, owners property insurance assessment, maximum $ 13.7