Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
CURRENT ASSETS:
Cash and cash equivalents	$ 24.7			$ 26.2
Receivables, net of allowance for credit losses of $24.7 and $32.9, respectively	383.7			221.6
Accounts receivable pledged as collateral	395.0			319.0
Fuel inventory and supplies	615.2			566.7
Income taxes receivable	7.5			28.0
Regulatory assets	365.9			424.1
Prepaid expenses	47.5			49.3
Other assets	66.2			75.4
Total Current Assets	1,905.7			1,710.3
PROPERTY, PLANT AND EQUIPMENT, NET	21,686.9			21,002.6
OTHER ASSETS:
Regulatory assets	1,992.1			1,991.1
Nuclear decommissioning trust fund	613.5			768.7
Goodwill	2,336.6			2,336.6
Other	570.3			563.4
Total Other Assets	5,512.5			5,659.8
TOTAL ASSETS	29,247.6			28,520.5
CURRENT LIABILITIES:
Current maturities of long-term debt	349.5			389.3
Notes payable and commercial paper	1,722.3			1,159.3
Collateralized note payable	395.0			319.0
Accounts payable	398.2			639.7
Accrued taxes	334.7			150.4
Accrued interest	88.6			118.8
Regulatory liabilities	74.6			70.7
Asset retirement obligations	18.0			19.5
Accrued compensation and benefits	72.2			51.6
Other	218.6			184.6
Total Current Liabilities	3,671.7			3,102.9
LONG-TERM LIABILITIES:
Long-term debt, net	9,197.2			9,297.9
Deferred income taxes	1,982.1			1,861.9
Unamortized investment tax credits	178.9			181.4
Regulatory liabilities	2,442.5			2,705.0
Pension and post-retirement liability	889.3			879.1
Asset retirement obligations	966.0			940.6
Other	304.4			310.0
Total Long-Term Liabilities	15,960.4			16,175.9
Evergy, Inc. Shareholders' Equity:
Common stock	7,216.6			7,205.5
Retained earnings	2,432.2			2,082.9
Accumulated other comprehensive loss	(39.8)			(44.0)
Total Evergy, Inc. Shareholders' Equity	9,609.0			9,244.4
Noncontrolling Interests	6.5			(2.7)
Total Equity	9,615.5	$ 9,310.8	$ 9,237.5	9,241.7	$ 9,312.0	$ 8,977.1	$ 8,794.4	$ 8,718.5
TOTAL LIABILITIES AND EQUITY	29,247.6			28,520.5
Variable Interest Entities
CURRENT ASSETS:
PROPERTY, PLANT AND EQUIPMENT, NET	$ 142.5			$ 147.8