Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
CURRENT ASSETS:
Cash and cash equivalents	$ 41.0			$ 25.2
Receivables, net of allowance for credit losses of $21.5 and $31.4, respectively	330.1			315.3
Accounts receivable pledged as collateral	395.0			359.0
Fuel inventory and supplies	739.9			672.9
Income taxes receivable	14.9			9.3
Regulatory assets	285.0			368.0
Prepaid expenses	52.0			47.8
Other assets	38.2			44.5
Total Current Assets	1,896.1			1,842.0
PROPERTY, PLANT AND EQUIPMENT, NET	23,141.4			22,136.5
OTHER ASSETS:
Regulatory assets	1,845.6			1,846.3
Nuclear decommissioning trust fund	711.2			653.3
Goodwill	2,336.6			2,336.6
Other	549.7			534.5
Total Other Assets	5,443.1			5,370.7
TOTAL ASSETS	30,616.0			29,489.9
CURRENT LIABILITIES:
Current maturities of long-term debt	889.4			439.1
Notes payable and commercial paper	2,178.4			1,332.3
Collateralized note payable	395.0			359.0
Accounts payable	418.0			600.8
Accrued taxes	339.9			163.0
Accrued interest	122.6			124.3
Regulatory liabilities	197.9			155.4
Asset retirement obligations	40.9			40.4
Accrued compensation and benefits	67.4			81.1
Other	160.2			198.4
Total Current Liabilities	4,809.7			3,493.8
LONG-TERM LIABILITIES:
Long-term debt, net	9,297.6			9,905.7
Deferred income taxes	2,096.7			1,996.6
Unamortized investment tax credits	172.7			174.6
Regulatory liabilities	2,566.6			2,566.8
Pension and post-retirement liability	469.8			458.4
Asset retirement obligations	1,155.3			1,112.8
Other	279.8			287.9
Total Long-Term Liabilities	16,038.5			16,502.8
Evergy, Inc. Shareholders' Equity:
Common stock	7,231.5			7,219.7
Retained earnings	2,548.0			2,298.5
Accumulated other comprehensive loss	(30.5)			(34.5)
Total Evergy, Inc. Shareholders' Equity	9,749.0			9,483.7
Noncontrolling Interests	18.8			9.6
Total Equity	9,767.8	$ 9,550.7	$ 9,501.7	9,493.3	$ 9,615.5	$ 9,310.8	$ 9,237.5	$ 9,241.7
TOTAL LIABILITIES AND EQUITY	30,616.0			29,489.9
Variable Interest Entities
CURRENT ASSETS:
PROPERTY, PLANT AND EQUIPMENT, NET	$ 135.4			$ 140.7