Consolidated Balance Sheets - Evergy Metro, Inc - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
CURRENT ASSETS:
Cash and cash equivalents	$ 63.7	$ 27.7
Receivables, net of allowance for credit losses of $6.4 and $7.9, respectively	175.3	256.9
Accounts receivable pledged as collateral	362.0	342.0
Fuel inventory and supplies	800.7	776.2
Income taxes receivable	0.0	11.5
Regulatory assets	330.1	292.1
Other assets	32.4	31.4
Total Current Assets	1,826.5	1,789.1
Property, plant and equipment, net	23,945.7	23,728.7
OTHER ASSETS:
Regulatory assets	1,758.6	1,795.3
Nuclear decommissioning trust fund	805.9	766.4
Other	583.0	560.0
Total Other Assets	5,484.1	5,458.3
TOTAL ASSETS	31,256.3	30,976.1
CURRENT LIABILITIES:
Current maturities of long-term debt	811.5	800.0
Commercial paper	798.7	951.8
Collateralized note payable	362.0	342.0
Accounts payable	356.7	616.9
Accrued taxes	264.5	156.7
Accrued interest	177.0	134.2
Regulatory liabilities	152.7	183.0
Asset retirement obligations	42.6	40.3
Accrued compensation and benefits	56.8	74.5
Other	167.4	213.2
Total Current Liabilities	3,189.9	3,512.6
LONG-TERM LIABILITIES:
Long-term debt, net	11,658.4	11,053.3
Deferred income taxes	2,117.2	2,097.9
Unamortized investment tax credits	168.2	170.0
Regulatory liabilities	2,522.1	2,542.5
Pension and post-retirement liability	475.4	464.1
Asset retirement obligations	1,169.7	1,162.8
Other	291.3	287.9
Total Long-Term Liabilities	18,402.3	17,778.5
Commitments and Contingencies (Note 10)
EQUITY:
Common stock	7,235.0	7,234.9
Retained earnings	2,432.4	2,457.8
Accumulated other comprehensive loss	(28.3)	(29.6)
Total Evergy, Inc. Shareholders' Equity	9,639.1	9,663.1
TOTAL LIABILITIES AND EQUITY	31,256.3	30,976.1
Evergy Metro
CURRENT ASSETS:
Cash and cash equivalents	11.0	3.3
Receivables, net of allowance for credit losses of $6.4 and $7.9, respectively	26.6	55.0
Accounts receivable pledged as collateral	130.0	126.0
Fuel inventory and supplies	276.0	264.6
Regulatory assets	63.5	53.2
Prepaid expenses	24.6	20.9
Other assets	18.9	14.7
Total Current Assets	680.3	666.2
Property, plant and equipment, net	8,168.5	8,131.2
OTHER ASSETS:
Regulatory assets	388.1	380.8
Nuclear decommissioning trust fund	430.0	401.3
Other	77.1	77.0
Total Other Assets	895.2	859.1
TOTAL ASSETS	9,744.0	9,656.5
CURRENT LIABILITIES:
Commercial paper	220.2	423.3
Collateralized note payable	130.0	126.0
Accounts payable	162.2	272.5
Accrued taxes	87.0	45.7
Accrued interest	44.4	27.4
Regulatory liabilities	35.4	43.0
Asset retirement obligations	16.3	16.0
Accrued compensation and benefits	26.8	36.9
Other	54.4	58.3
Total Current Liabilities	776.9	1,050.2
LONG-TERM LIABILITIES:
Long-term debt, net	3,217.6	2,924.4
Deferred income taxes	810.0	797.2
Unamortized investment tax credits	110.5	111.3
Regulatory liabilities	872.6	860.2
Pension and post-retirement liability	197.1	190.8
Asset retirement obligations	447.0	444.4
Other	86.7	85.0
Total Long-Term Liabilities	5,741.5	5,413.3
Commitments and Contingencies (Note 10)
EQUITY:
Common stock	1,563.1	1,563.1
Retained earnings	1,658.9	1,626.2
Accumulated other comprehensive loss	3.6	3.7
Total Evergy, Inc. Shareholders' Equity	3,225.6	3,193.0
TOTAL LIABILITIES AND EQUITY	9,744.0	9,656.5
Related Party [Member] | Evergy Metro
CURRENT ASSETS:
Related party receivables	129.7	128.5
CURRENT LIABILITIES:
Accounts payable	$ 0.2	$ 1.1