Consolidated Statements of Comprehensive Income - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Statement [Abstract]
OPERATING REVENUES	$ 1,331.0	$ 1,296.8
OPERATING EXPENSES:
Fuel and purchased power	376.4	354.2
SPP network transmission costs	72.7	81.2
Operating and maintenance	231.5	216.3
Depreciation and amortization	276.1	263.4
Taxes other than income tax	114.1	102.4
Total Operating Expenses	1,070.8	1,017.5
INCOME FROM OPERATIONS	260.2	279.3
OTHER INCOME (EXPENSE):
Investment earnings	5.3	9.1
Other income	8.5	12.2
Other expense	(9.5)	(21.3)
Total Other Income, Net	4.3	0.0
Interest expense	133.2	123.1
INCOME BEFORE INCOME TAXES	131.3	156.2
Income tax expense	7.3	12.4
Equity in earnings of equity method investees, net of income taxes	1.8	1.9
NET INCOME	125.8	145.7
Less: Net income attributable to noncontrolling interests	3.1	3.1
Net income attributable to Evergy, Inc.	$ 122.7	$ 142.6
BASIC AND DILUTED EARNINGS PER AVERAGE COMMON SHARE OUTSTANDING ATTRIBUTABLE TO EVERGY, INC. (see Note 1)
Basic earnings per common share (in dollars per share)	$ 0.53	$ 0.62
Diluted earnings per common share (in dollars per share)	$ 0.53	$ 0.62
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Basic (in shares)	230.2	230.0
Diluted (in shares)	230.4	230.3
COMPREHENSIVE INCOME
NET INCOME	$ 125.8	$ 145.7
Derivative hedging activity
Reclassification to expenses, net of tax	1.3	1.3
Derivative hedging activity, net of tax	1.3	1.3
Defined benefit pension plans
Total other comprehensive income	1.3	1.3
COMPREHENSIVE INCOME	127.1	147.0
Less:  Comprehensive income attributable to noncontrolling interest	3.1	3.1
Comprehensive Income, Net of Tax, Attributable to Parent, Total	$ 124.0	$ 143.9