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).

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The proportionate share of interest (percent) in a jointly owned utility plant.

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Amount of transactions with related party during the financial reporting period.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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RELATED PARTY TRANSACTIONS AND RELATIONSHIPS (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Related Party Transaction [Line Items]
Due to Related Party, Current	$ (356.7)		$ (616.9)
Evergy Metro
Related Party Transaction [Line Items]
Due to Related Party, Current	(162.2)		(272.5)
Evergy Metro \| Evergy Missouri West
Related Party Transaction [Line Items]
Due from Related Party, Current	80.6		91.9
Evergy Metro \| Evergy Missouri West \| Operating Expenses and Capital Costs Billed
Related Party Transaction [Line Items]
Related party transaction	28.2	$ 26.8
Evergy Metro \| Evergy Kansas Central
Related Party Transaction [Line Items]
Due from Related Party, Current	28.3		19.6
Evergy Metro \| Evergy Kansas Central \| Operating Expenses and Capital Costs Billed
Related Party Transaction [Line Items]
Related party transaction	32.4	28.9
Evergy Metro \| Evergy
Related Party Transaction [Line Items]
Due from Related Party, Current	20.6		15.9
Evergy Metro \| Evergy \| Income Tax Receivable
Related Party Transaction [Line Items]
Due to Related Party, Current	(12.1)		(6.8)
Evergy Metro \| Related Party [Member]
Related Party Transaction [Line Items]
Due from Related Party, Current	129.7		128.5
Due to Related Party, Current	(0.2)		(1.1)
Evergy Metro \| Related Party [Member] \| Evergy Inc Money Pool
Related Party Transaction [Line Items]
Due from Related Party, Current	0.0		0.0
Due to Related Party, Current	0.0		0.0
Evergy Kansas Central
Related Party Transaction [Line Items]
Due to Related Party, Current	(158.0)		(244.7)
Evergy Kansas Central \| Evergy Missouri West
Related Party Transaction [Line Items]
Due from Related Party, Current	8.9		11.3
Evergy Kansas Central \| Evergy Missouri West \| Operating Expenses and Capital Costs Billed
Related Party Transaction [Line Items]
Related party transaction	7.1	6.2
Evergy Kansas Central \| Evergy Metro
Related Party Transaction [Line Items]
Due to Related Party, Current	(28.3)		(19.6)
Evergy Kansas Central \| Evergy Metro \| Operating Expenses and Capital Costs Billed
Related Party Transaction [Line Items]
Related party transaction	11.3	$ 10.9
Evergy Kansas Central \| Evergy
Related Party Transaction [Line Items]
Due to Related Party, Current	(331.2)		(274.5)
Evergy Kansas Central \| Evergy \| Income Taxes Payable
Related Party Transaction [Line Items]
Due from Related Party, Current	3.9		11.5
Evergy Kansas Central \| Related Party [Member]
Related Party Transaction [Line Items]
Due from Related Party, Current	10.9		11.6
Due to Related Party, Current	(361.5)		(294.4)
Evergy Kansas Central \| Related Party [Member] \| Evergy Inc Money Pool
Related Party Transaction [Line Items]
Due to Related Party, Current	$ (319.2)		$ (261.4)
Jointly Owned Electricity Generation Plant Iatan No 1 And 2 \| Evergy Missouri West
Related Party Transaction [Line Items]
Jointly owned utility plant, proportionate ownership share	18.00%
Jeffrey Energy Center \| Evergy Missouri West
Related Party Transaction [Line Items]
Jointly owned utility plant, proportionate ownership share	8.00%
La Cygne Station \| Evergy Kansas Central
Related Party Transaction [Line Items]
Jointly owned utility plant, proportionate ownership share	50.00%