Aggregate dividends paid during the period for each share of common stock outstanding.

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Aggregate dividends declared during the period for each share of common stock outstanding.

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Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Dividends Declared (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended	12 Months Ended
	Mar. 20, 2020	Feb. 29, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Feb. 20, 2020
Dividends Payable [Line Items]
Dividends declared on common stock (in dollars per share)			$ 1.93	$ 1.735	$ 1.60
Common Stock \| Subsequent Event
Dividends Payable [Line Items]
Dividends declared on common stock (in dollars per share)		$ 0.505
Dividends paid on common stock (in dollars per share)	$ 0.505
Evergy Kansas Central \| Subsequent Event
Dividends Payable [Line Items]
Dividends Payable						$ 60.0
Evergy Metro \| Subsequent Event
Dividends Payable [Line Items]
Dividends Payable						$ 60.0