Consolidated Statements of Comprehensive Income - Evergy Metro, Inc - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
OPERATING REVENUES	$ 4,913.4	$ 5,147.8	$ 4,275.9
OPERATING EXPENSES:
Fuel and purchased power	1,099.0	1,265.0	1,078.7
Operating and maintenance	1,163.0	1,218.5	1,115.8
Depreciation and amortization	880.1	861.7	618.8
Taxes other than income tax	364.2	365.5	269.1
Total Operating Expenses	3,769.5	3,962.0	3,342.3
INCOME FROM OPERATIONS	1,143.9	1,185.8	933.6
OTHER INCOME (EXPENSE):
Investment earnings	10.8	11.0	8.8
Other income	31.3	26.9	15.5
Other expense	(78.2)	(76.9)	(78.7)
Total Other Expense, Net	(36.1)	(39.0)	(54.4)
Interest expense	383.9	374.0	279.6
INCOME BEFORE INCOME TAXES	723.9	772.8	599.6
Interest expense	102.2	97.0	59.0
Net income attributable to Evergy, Inc.	618.3	669.9	535.8
Derivative hedging activity
Reclassification to expenses, net of tax	3.0	1.5	0.0
Derivative hedging activity, net of tax	3.0	(46.4)	(4.0)
Total other comprehensive income (loss)	0.6	(47.0)	(3.0)
COMPREHENSIVE INCOME	618.9	622.9	532.8
Evergy Metro
OPERATING REVENUES	1,705.6	1,806.5	1,823.1
OPERATING EXPENSES:
Fuel and purchased power	416.1	482.1	520.6
Operating and maintenance	407.5	451.9	494.2
Depreciation and amortization	326.1	318.4	281.3
Taxes other than income tax	121.6	127.6	117.2
Total Operating Expenses	1,271.3	1,380.0	1,413.3
INCOME FROM OPERATIONS	434.3	426.5	409.8
OTHER INCOME (EXPENSE):
Investment earnings	1.4	2.4	2.8
Other income	9.2	3.2	2.2
Other expense	(25.5)	(21.4)	(30.9)
Total Other Expense, Net	(14.9)	(15.8)	(25.9)
Interest expense	113.6	119.8	133.7
INCOME BEFORE INCOME TAXES	305.8	290.9	250.2
Interest expense	7.1	35.7	87.3
Net income attributable to Evergy, Inc.	298.7	255.2	162.9
Derivative hedging activity
Reclassification to expenses, net of tax	(0.2)	0.7	3.7
Derivative hedging activity, net of tax	(0.2)	0.7	3.7
Total other comprehensive income (loss)	(0.2)	0.7	3.7
COMPREHENSIVE INCOME	$ 298.5	$ 255.9	$ 166.6