Schedule I Financial Statements of Parent Company Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
CURRENT ASSETS:
Cash and cash equivalents	$ 27.7	$ 25.2
Income taxes receivable	11.5	9.3
Prepaid expenses and other assets	51.3	47.8
Total Current Assets	1,789.1	1,842.0
OTHER ASSETS:
Other	560.0	534.5
TOTAL ASSETS	30,976.1	29,489.9
CURRENT LIABILITIES:
Current maturities of long-term debt	800.0	439.1
Due to Related Party, Current	616.9	600.8
Accrued interest	134.2	124.3
Derivative Liability, Current	11.6	25.8
Other	213.2	198.4
Total Current Liabilities	3,512.6	3,493.8
LONG-TERM LIABILITIES:
Long-term debt, net	11,053.3	9,905.7
Other	287.9	287.9
Total Long-Term Liabilities	17,778.5	16,502.8
Commitments and Contingencies (Note 15)
Evergy, Inc. Shareholders' Equity:
Common stock - 600,000,000 shares authorized, without par value, 229,729,296 and 229,546,105 shares issued	7,234.9	7,219.7
Retained earnings	2,457.8	2,298.5
Accumulated other comprehensive loss	(29.6)	(34.5)
Total Evergy, Inc. Shareholders' Equity	9,663.1	9,483.7
TOTAL LIABILITIES AND EQUITY	30,976.1	29,489.9
Parent
CURRENT ASSETS:
Cash and cash equivalents	0.0	0.4
Income taxes receivable	11.2	5.8
Prepaid expenses and other assets	0.7	2.1
Total Current Assets	675.0	104.8
OTHER ASSETS:
Investment in subsidiaries	11,867.1	11,367.3
Deferred income taxes	15.8	18.5
Other	1.7	0.8
Total Other Assets	11,884.6	11,386.6
TOTAL ASSETS	12,559.6	11,491.4
CURRENT LIABILITIES:
Current maturities of long-term debt	800.0	0.0
Accrued interest	16.7	12.6
Other	6.8	7.3
Total Current Liabilities	854.3	39.7
LONG-TERM LIABILITIES:
Long-term debt, net	2,173.6	2,092.0
Other	13.9	19.4
Total Long-Term Liabilities	2,187.5	2,111.4
Commitments and Contingencies (Note 15)
Evergy, Inc. Shareholders' Equity:
Common stock - 600,000,000 shares authorized, without par value, 229,729,296 and 229,546,105 shares issued	7,218.1	7,202.9
Retained earnings	2,329.3	2,171.9
Accumulated other comprehensive loss	(29.6)	(34.5)
Total Evergy, Inc. Shareholders' Equity	9,517.8	9,340.3
TOTAL LIABILITIES AND EQUITY	12,559.6	11,491.4
Parent \| Related Party [Member]
CURRENT ASSETS:
Accounts receivable from subsidiaries	58.5	65.0
Notes receivable from subsidiaries	604.6	31.5
CURRENT LIABILITIES:
Due to Related Party, Current	$ 30.8	$ 19.8

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- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).