Consolidated Balance Sheets - Evergy Kansas Central, Inc - USD ($)	Mar. 31, 2024	Dec. 31, 2023
CURRENT ASSETS:
Cash and cash equivalents	$ 63,700,000	$ 27,700,000
Receivables, net of allowance for credit losses of $9.0 and $11.6, respectively	175,300,000	256,900,000
Accounts receivable pledged as collateral	362,000,000.0	342,000,000.0
Fuel inventory and supplies	800,700,000	776,200,000
Income taxes receivable	0	11,500,000
Regulatory assets	330,100,000	292,100,000
Prepaid expenses	62,300,000	51,300,000
Other assets	32,400,000	31,400,000
Total Current Assets	1,826,500,000	1,789,100,000
PROPERTY, PLANT AND EQUIPMENT, NET, includes $131.8 and $133.6 related to variable interest entity, respectively	23,945,700,000	23,728,700,000
OTHER ASSETS:
Regulatory assets	1,758,600,000	1,795,300,000
Nuclear decommissioning trust fund	805,900,000	766,400,000
Other	583,000,000.0	560,000,000.0
Total Other Assets	5,484,100,000	5,458,300,000
TOTAL ASSETS	31,256,300,000	30,976,100,000
CURRENT LIABILITIES:
Current maturities of long-term debt	811,500,000	800,000,000.0
Commercial paper	798,700,000	951,800,000
Collateralized note payable	362,000,000.0	342,000,000.0
Accounts payable	356,700,000	616,900,000
Accrued taxes	264,500,000	156,700,000
Accrued interest	177,000,000.0	134,200,000
Regulatory liabilities	152,700,000	183,000,000.0
Asset retirement obligations	42,600,000	40,300,000
Accrued compensation and benefits	56,800,000	74,500,000
Other	167,400,000	213,200,000
Total Current Liabilities	3,189,900,000	3,512,600,000
LONG-TERM LIABILITIES:
Long-term debt, net	11,658,400,000	11,053,300,000
Deferred income taxes	2,117,200,000	2,097,900,000
Unamortized investment tax credits	168,200,000	170,000,000.0
Regulatory liabilities	2,522,100,000	2,542,500,000
Pension and post-retirement liability	475,400,000	464,100,000
Asset retirement obligations	1,169,700,000	1,162,800,000
Other	291,300,000	287,900,000
Total Long-Term Liabilities	18,402,300,000	17,778,500,000
Commitments and Contingencies (Note 10)
Evergy, Inc. Shareholders' Equity:
Common stock	7,235,000,000	7,234,900,000
Retained earnings	2,432,400,000	2,457,800,000
Total Evergy, Inc. Shareholders' Equity	9,639,100,000	9,663,100,000
Noncontrolling Interests	25,000,000.0	21,900,000
Total Equity	9,664,100,000	9,685,000,000
TOTAL LIABILITIES AND EQUITY	31,256,300,000	30,976,100,000
Evergy Kansas Central
CURRENT ASSETS:
Cash and cash equivalents	32,500,000	9,200,000
Receivables, net of allowance for credit losses of $9.0 and $11.6, respectively	125,600,000	171,800,000
Accounts receivable pledged as collateral	182,000,000.0	166,000,000.0
Fuel inventory and supplies	422,400,000	411,900,000
Income taxes receivable	3,900,000	11,500,000
Regulatory assets	134,100,000	127,700,000
Prepaid expenses	29,200,000	22,900,000
Other assets	9,500,000	13,200,000
Total Current Assets	950,100,000	945,800,000
PROPERTY, PLANT AND EQUIPMENT, NET, includes $131.8 and $133.6 related to variable interest entity, respectively	12,244,900,000	12,121,900,000
OTHER ASSETS:
Regulatory assets	490,000,000.0	505,200,000
Nuclear decommissioning trust fund	375,900,000	365,100,000
Other	304,300,000	288,600,000
Total Other Assets	1,170,200,000	1,158,900,000
TOTAL ASSETS	14,365,200,000	14,226,600,000
CURRENT LIABILITIES:
Commercial paper	261,500,000	230,400,000
Collateralized note payable	182,000,000.0	166,000,000.0
Accounts payable	158,000,000.0	244,700,000
Accrued taxes	161,700,000	111,100,000
Accrued interest	96,300,000	79,700,000
Regulatory liabilities	80,600,000	104,100,000
Asset retirement obligations	24,000,000.0	22,200,000
Accrued compensation and benefits	29,900,000	37,600,000
Other	103,400,000	142,400,000
Total Current Liabilities	1,458,900,000	1,432,600,000
LONG-TERM LIABILITIES:
Long-term debt, net	4,581,000,000	4,580,400,000
Deferred income taxes	850,600,000	844,200,000
Unamortized investment tax credits	55,300,000	56,200,000
Regulatory liabilities	1,414,300,000	1,432,400,000
Pension and post-retirement liability	261,100,000	256,300,000
Asset retirement obligations	581,100,000	577,100,000
Other	159,400,000	155,500,000
Total Long-Term Liabilities	7,902,800,000	7,902,100,000
Commitments and Contingencies (Note 10)
Evergy, Inc. Shareholders' Equity:
Common stock	2,737,600,000	2,737,600,000
Retained earnings	2,240,900,000	2,132,400,000
Total Evergy, Inc. Shareholders' Equity	4,978,500,000	4,870,000,000
Noncontrolling Interests	25,000,000.0	21,900,000
Total Equity	5,003,500,000	4,891,900,000
TOTAL LIABILITIES AND EQUITY	14,365,200,000	14,226,600,000
Related Party [Member] | Evergy Kansas Central
CURRENT ASSETS:
Related party receivables	10,900,000	11,600,000
CURRENT LIABILITIES:
Accounts payable	361,500,000	294,400,000
Variable Interest Entities
CURRENT ASSETS:
Regulatory assets	15,200,000	0
PROPERTY, PLANT AND EQUIPMENT, NET, includes $131.8 and $133.6 related to variable interest entity, respectively	131,800,000	133,600,000
OTHER ASSETS:
Regulatory assets	306,500,000	0
CURRENT LIABILITIES:
Current maturities of long-term debt	11,500,000	0
Accrued interest	1,700,000
LONG-TERM LIABILITIES:
Long-term debt, net	311,500,000	0
Variable Interest Entities | Evergy Kansas Central
CURRENT ASSETS:
PROPERTY, PLANT AND EQUIPMENT, NET, includes $131.8 and $133.6 related to variable interest entity, respectively	$ 131,800,000	$ 133,600,000