Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
CURRENT ASSETS:
Cash and cash equivalents	$ 58.4		$ 144.9
Receivables, net of allowance for credit losses of $20.0 and $19.3, respectively	398.4		273.9
Accounts receivable pledged as collateral	326.0		360.0
Fuel inventory and supplies	538.1		504.5
Income taxes receivable	57.7		62.9
Regulatory assets	272.7		206.2
Prepaid expenses and other assets	78.3		71.9
Total Current Assets	1,729.6		1,624.3
PROPERTY, PLANT AND EQUIPMENT, NET	20,324.1		19,951.0
OTHER ASSETS:
Regulatory assets	2,214.4		1,868.2
Nuclear decommissioning trust fund	729.4		652.1
Goodwill	2,336.6		2,336.6
Other	523.3		527.7
Total Other Assets	5,803.7		5,384.6
TOTAL ASSETS	28,008.8		27,114.8
CURRENT LIABILITIES:
Notes payable and commercial paper	913.0		315.0
Collateralized note payable	326.0		360.0
Accounts payable	390.0		654.0
Accrued taxes	201.0		143.8
Accrued interest	94.4		123.4
Regulatory liabilities	48.5		26.1
Asset retirement obligations	28.7		40.2
Accrued compensation and benefits	59.8		55.5
Other	169.6		182.6
Total Current Liabilities	2,703.9		2,355.8
LONG-TERM LIABILITIES:
Deferred income taxes	1,745.3		1,664.8
Unamortized investment tax credits	184.1		186.7
Regulatory liabilities	2,731.1		2,638.8
Pension and post-retirement liability	1,136.7		1,149.4
Asset retirement obligations	926.8		901.7
Other	306.5		308.2
Total Long-Term Liabilities	16,327.8		16,040.5
Commitments and Contingencies (Note 10)
Evergy, Inc. Shareholders' Equity:
Common stock - 600,000,000 shares authorized, without par value 229,296,214 and 226,836,670 shares issued, stated value	7,197.6		7,080.0
Retained earnings	1,835.0		1,702.8
Accumulated other comprehensive loss	(46.6)		(49.4)
Total Evergy, Inc. Shareholders' Equity	8,986.0		8,733.4
Noncontrolling Interests	(8.9)		(14.9)
Total Equity	8,977.1	$ 8,794.4	8,718.5	$ 8,526.9	$ 8,505.4	$ 8,545.3
TOTAL LIABILITIES AND EQUITY	28,008.8		27,114.8
Consolidated Entity Excluding Variable Interest Entities (VIE)
CURRENT LIABILITIES:
Current maturities of long-term debt	472.9		436.4
LONG-TERM LIABILITIES:
Long-term debt, net	9,297.3		9,190.9
Variable Interest Entities
CURRENT ASSETS:
PROPERTY, PLANT AND EQUIPMENT, NET	151.4		154.9
CURRENT LIABILITIES:
Current maturities of long-term debt	$ 0.0		$ 18.8