Evergy (EVRG) 10-K 25 Feb 22 2021 FY Annual report Financial data

Cover Page

Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2021	Feb. 18, 2022	Jun. 30, 2021
Entity Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Document Transition Report	false
Entity File Number	001-38515
Entity Registrant Name	EVERGY, INC.
Entity Tax Identification Number	82-2733395
Entity Incorporation, State or Country Code	MO
Entity Address, Address Line One	1200 Main Street
Entity Address, City or Town	Kansas City
Entity Address, State or Province	MO
Entity Address, Postal Zip Code	64105
City Area Code	816
Local Phone Number	556-2200
Title of 12(b) Security	Evergy, Inc. common stock
Trading Symbol	EVRG
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		229,311,689
Entity Central Index Key	0001711269
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	FY
Amendment Flag	false
Document Fiscal Year Focus	2021
Entity Public Float			$ 13,704,717,320
Evergy Kansas Central
Entity Information [Line Items]
Entity File Number	001-03523
Entity Registrant Name	EVERGY KANSAS CENTRAL, INC.
Entity Tax Identification Number	48-0290150
Entity Incorporation, State or Country Code	KS
Entity Address, Address Line One	818 South Kansas Avenue
Entity Address, City or Town	Topeka
Entity Address, State or Province	KS
Entity Address, Postal Zip Code	66612
City Area Code	785
Local Phone Number	575-6300
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		1
Entity Central Index Key	0000054507
Evergy Metro
Entity Information [Line Items]
Entity File Number	000-51873
Entity Registrant Name	EVERGY METRO, INC.
Entity Tax Identification Number	44-0308720
Entity Incorporation, State or Country Code	MO
Entity Address, Address Line One	1200 Main Street
Entity Address, City or Town	Kansas City
Entity Address, State or Province	MO
Entity Address, Postal Zip Code	64105
City Area Code	816
Local Phone Number	556-2200
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		1
Entity Central Index Key	0000054476

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2021
Auditor [Line Items]
Auditor Location	Kansas City, Missouri
Auditor Name	DELOITTE & TOUCHE LLP
Auditor Firm ID	34

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
OPERATING REVENUES	$ 5,586.7	$ 4,913.4	$ 5,147.8
OPERATING EXPENSES:
Fuel and purchased power	1,557	1,099	1,265
SPP network transmission costs	290.4	263.2	251.3
Operating and maintenance	1,107.5	1,163	1,218.5
Depreciation and amortization	896.4	880.1	861.7
Taxes other than income tax	380.5	364.2	365.5
Total Operating Expenses	4,231.8	3,769.5	3,962
INCOME FROM OPERATIONS	1,354.9	1,143.9	1,185.8
OTHER INCOME (EXPENSE):
Investment earnings	59.9	10.8	11
Other income	46.3	31.3	26.9
Other expense	(87.4)	(78.2)	(76.9)
Total Other Expense, Net	18.8	(36.1)	(39)
Interest expense	372.6	383.9	374
INCOME BEFORE INCOME TAXES	1,001.1	723.9	772.8
Income tax expense	117.4	102.2	97
Equity in earnings of equity method investees, net of income taxes	8.2	8.3	9.8
NET INCOME	891.9	630	685.6
Less: Net income attributable to noncontrolling interests	12.2	11.7	15.7
Net income attributable to Evergy, Inc.	$ 879.7	$ 618.3	$ 669.9
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)	$ 3.84	$ 2.72	$ 2.80
Diluted earnings per common share (in dollars per share)	$ 3.83	$ 2.72	$ 2.79
AVERAGE COMMON SHARES OUTSTANDING
Basic (in shares)	229	227.2	239.5
Diluted (in shares)	229.6	227.5	239.9
COMPREHENSIVE INCOME
NET INCOME	$ 891.9	$ 630	$ 685.6
Derivative hedging activity
Loss on derivative hedging instruments	0	0	(64.4)
Income tax benefit	0	0	16.5
Net loss on derivative hedging instruments	0	0	(47.9)
Reclassification to expenses, net of tax	5.5	3	1.5
Derivative hedging activity, net of tax	5.5	3	(46.4)
Defined benefit pension plans
Net loss arising during period	(0.1)	(3)	(0.8)
Income tax benefit	0	0.7	0.2
Net loss arising during period, net of tax	(0.1)	(2.3)	(0.6)
Amortization of net losses included in net periodic benefit costs, net of tax	0	(0.1)	0
Change in unrecognized pension expense, net of tax	(0.1)	(2.4)	(0.6)
Total other comprehensive loss	5.4	0.6	(47)
COMPREHENSIVE INCOME	897.3	630.6	638.6
Less:  comprehensive income attributable to noncontrolling interest	12.2	11.7	15.7
COMPREHENSIVE INCOME	$ 885.1	$ 618.9	$ 622.9

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
CURRENT ASSETS:
Cash and cash equivalents	$ 26.2	$ 144.9
Receivables, net of allowance for credit losses of $32.9 and $19.3, respectively	221.6	273.9
Accounts receivable pledged as collateral	319	360
Fuel inventory and supplies	566.7	504.5
Income taxes receivable	28	62.9
Regulatory assets	424.1	206.2
Prepaid expenses	49.3	48.2
Other assets	75.4	23.7
Total Current Assets	1,710.3	1,624.3
PROPERTY, PLANT AND EQUIPMENT, NET	21,002.6	19,951
OTHER ASSETS:
Regulatory assets	1,991.1	1,868.2
Nuclear decommissioning trust fund	768.7	652.1
Goodwill	2,336.6	2,336.6
Other	563.4	527.7
Total Other Assets	5,659.8	5,384.6
TOTAL ASSETS	28,520.5	27,114.8
CURRENT LIABILITIES:
Current maturities of long-term debt	389.3	436.4
Notes payable and commercial paper	1,159.3	315
Collateralized note payable	319	360
Accounts payable	639.7	654
Accrued taxes	150.4	143.8
Accrued interest	118.8	123.4
Regulatory liabilities	70.7	26.1
Asset retirement obligations	19.5	40.2
Accrued compensation and benefits	51.6	55.5
Other	184.6	182.6
Total Current Liabilities	3,102.9	2,355.8
LONG-TERM LIABILITIES:
Long-term debt, net	9,297.9	9,190.9
Deferred income taxes	1,861.9	1,664.8
Unamortized investment tax credits	181.4	186.7
Regulatory liabilities	2,705	2,638.8
Pension and post-retirement liability	879.1	1,149.4
Asset retirement obligations	940.6	901.7
Other	310	308.2
Total Long-Term Liabilities	16,175.9	16,040.5
Evergy, Inc. Shareholders' Equity:
Retained earnings	2,082.9	1,702.8
Accumulated other comprehensive loss	(44)	(49.4)
Total Evergy, Inc. Shareholders' Equity	9,244.4	8,733.4
Noncontrolling Interests	(2.7)	(14.9)
Total Equity	9,241.7	8,718.5	$ 8,545.3	$ 9,990.7
TOTAL LIABILITIES AND EQUITY	28,520.5	27,114.8
Consolidated Entity Excluding Variable Interest Entities (VIE)
CURRENT LIABILITIES:
Current maturities of long-term debt	389.3	436.4
LONG-TERM LIABILITIES:
Long-term debt, net	9,297.9	9,190.9
Variable Interest Entities
CURRENT ASSETS:
PROPERTY, PLANT AND EQUIPMENT, NET	147.8	154.9
CURRENT LIABILITIES:
Current maturities of long-term debt	0	18.8
Accrued interest	$ 0	$ 0.1

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Allowance for credit losses	$ 32.9	$ 19.3	$ 10.5
Common stock - shares authorized (in shares)	600,000,000	600,000,000
Common stock - shares issued (in shares)	229,299,900	226,836,670

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
CASH FLOWS FROM (USED IN) OPERATING ACTIVITIES:
Net income	$ 891.9	$ 630	$ 685.6
Adjustments to reconcile income to net cash from operating activities:
Depreciation and amortization	896.4	880.1	861.7
Amortization of nuclear fuel	51.4	58.3	51.4
Amortization of deferred refueling outage	25.1	25.4	25.5
Amortization of corporate-owned life insurance	24.1	20.1	19.8
Non-cash compensation	15.6	16	16.3
Net deferred income taxes and credits	102.2	126.9	121.5
Allowance for equity funds used during construction	(29.4)	(17.2)	(2.2)
Payments for asset retirement obligations	(22.6)	(18.4)	(17.8)
Equity in earnings of equity method investees, net of income taxes	(8.2)	(8.3)	(9.8)
Income from corporate-owned life insurance	(14.2)	(8.2)	(29.6)
Other	(13.8)	0.8	(3.2)
Changes in working capital items:
Accounts receivable	69.9	(4.9)	(23.1)
Accounts receivable pledged as collateral	41	(21)	26
Fuel inventory and supplies	(61.6)	(22.3)	29.9
Prepaid expenses and other current assets	(299.8)	16.9	43.4
Accounts payable	(55.1)	134.3	16.9
Accrued taxes	41.4	6.7	(8.2)
Other current liabilities	(19.4)	(98.9)	(59.4)
Changes in other assets	(251.5)	119.5	79.8
Changes in other liabilities	(31.7)	(82)	(75.5)
Cash Flows from Operating Activities	1,351.7	1,753.8	1,749
CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES:
Additions to property, plant and equipment	(1,972.5)	(1,560.3)	(1,210.1)
Purchase of securities - trusts	(158.2)	(65.6)	(55.8)
Sale of securities - trusts	115.7	56.5	47.3
Investment in corporate-owned life insurance	(14.2)	(19.1)	(18.3)
Proceeds from investment in corporate-owned life insurance	77	65.9	161.7
Other investing activities	38.4	(11.1)	(5.1)
Cash Flows used in Investing Activities	(1,913.8)	(1,533.7)	(1,080.3)
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES:
Short-term debt, net	840.5	(246.9)	(176.7)
Proceeds from term loan facility	0	0	1,000
Repayment of term loan facility	0	0	(1,000)
Collateralized short-term borrowings, net	(41)	21	(26)
Issuance of common stock	112.5	0	0
Proceeds from long-term debt	497.3	888.8	2,372.7
Retirements of long-term debt	(432)	(251.1)	(701.1)
Retirements of long-term debt of variable interest entities	(18.8)	(32.3)	(30.3)
Payment for settlement of interest rate swap accounted for as a cash flow hedge	0	0	(69.8)
Borrowings against cash surrender value of corporate-owned life insurance	54.4	55.5	59.4
Repayment of borrowings against cash surrender value of corporate-owned life insurance	(62.3)	(54.8)	(127.5)
Cash dividends paid	(497.9)	(465)	(462.5)
Repurchase of common stock under repurchase plan	0	0	(1,628.7)
Distributions to shareholders of noncontrolling interests	0	0	(8.6)
Other financing activities	(9.3)	(13.6)	(6.7)
Cash Flows from (used in) Financing Activities	443.4	(98.4)	(805.8)
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(118.7)	121.7	(137.1)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH:
Beginning of period	144.9	23.2	160.3
End of period	$ 26.2	$ 144.9	$ 23.2

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity - USD ($) $ in Millions	Total	Common Stock	Retained earnings	AOCI	Non-controlling interests
Beginning balance (in shares) at Dec. 31, 2018		255,326,252
Beginning balance at Dec. 31, 2018	$ 9,990.7	$ 8,685.2	$ 1,346	$ (3)	$ (37.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	685.6		669.9		15.7
Issuance of stock compensation and reinvested dividends, net of tax withholding (in shares)		111,849
Issuance of stock compensation and reinvested dividends, net of tax withholding	(2.4)	$ (2.4)
Dividends declared on common stock	(462.5)		(462.5)
Dividend equivalents declared	(1.9)		(1.9)
Stock compensation expense	16.3	$ 16.3
Repurchase of common stock (in shares)		(28,796,658)
Repurchase of common stock under repurchase plan	(1,628.7)	$ (1,628.7)
Consolidation of noncontrolling interests	3.8				3.8
Distributions to shareholders of noncontrolling interests	(8.6)				(8.6)
Unearned compensation
Derivative hedging activity, net of tax	(46.4)			(46.4)
Change in unrecognized pension expense, net of tax	(0.6)			(0.6)
Ending balance (in shares) at Dec. 31, 2019		226,641,443
Ending balance at Dec. 31, 2019	8,545.3	$ 7,070.4	1,551.5	(50)	(26.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	630		618.3		11.7
Issuance of stock compensation and reinvested dividends, net of tax withholding (in shares)		195,227
Issuance of stock compensation and reinvested dividends, net of tax withholding	(5.9)	$ (5.9)
Dividends declared on common stock	(465)		(465)
Dividend equivalents declared	(2)		(2)
Stock compensation expense	16	16
Unearned compensation
Derivative hedging activity, net of tax	3			3
Change in unrecognized pension expense, net of tax	(2.4)			(2.4)
Other	(0.5)	$ (0.5)
Ending balance (in shares) at Dec. 31, 2020		226,836,670
Ending balance at Dec. 31, 2020	8,718.5	$ 7,080	1,702.8	(49.4)	(14.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	891.9		879.7		12.2
Issuance of stock, net of issuance costs (in shares)		2,269,447
Issuance of stock, net of issuance costs	112.5	$ 112.5
Issuance of stock compensation and reinvested dividends, net of tax withholding (in shares)		139,729
Issuance of stock compensation and reinvested dividends, net of tax withholding	(2.4)	$ (2.4)
Issuance of restricted common stock (in shares)		54,054
Issuance of restricted common stock	2.9	$ 2.9
Dividends declared on common stock	(497.9)		(497.9)
Dividend equivalents declared	(1.7)		(1.7)
Stock compensation expense	13.8	13.8
Unearned compensation
Issuance of restricted common stock	(2.9)	(2.9)
Compensation expense recognized	1.8	1.8
Derivative hedging activity, net of tax	5.5			5.5
Change in unrecognized pension expense, net of tax	(0.1)			(0.1)
Other	(0.2)	$ (0.2)
Ending balance (in shares) at Dec. 31, 2021		229,299,900
Ending balance at Dec. 31, 2021	$ 9,241.7	$ 7,205.5	$ 2,082.9	$ (44)	$ (2.7)

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Stockholders' Equity [Abstract]
Dividends declared on common stock (in dollars per share)	$ 2.178	$ 2.05	$ 1.93

Consolidated Statements of Inco

Consolidated Statements of Income - Evergy Kansas Central, Inc - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
OPERATING REVENUES	$ 5,586.7	$ 4,913.4	$ 5,147.8
OPERATING EXPENSES:
Fuel and purchased power	1,557	1,099	1,265
SPP network transmission costs	290.4	263.2	251.3
Operating and maintenance	1,107.5	1,163	1,218.5
Depreciation and amortization	896.4	880.1	861.7
Taxes other than income tax	380.5	364.2	365.5
Total Operating Expenses	4,231.8	3,769.5	3,962
INCOME FROM OPERATIONS	1,354.9	1,143.9	1,185.8
OTHER INCOME (EXPENSE):
Investment earnings	59.9	10.8	11
Other income	46.3	31.3	26.9
Other expense	(87.4)	(78.2)	(76.9)
Total Other Expense, Net	18.8	(36.1)	(39)
Interest expense	372.6	383.9	374
INCOME BEFORE INCOME TAXES	1,001.1	723.9	772.8
Income tax expense	117.4	102.2	97
Equity in earnings of equity method investees, net of income taxes	8.2	8.3	9.8
NET INCOME	891.9	630	685.6
Less: Net income attributable to noncontrolling interests	12.2	11.7	15.7
Net income attributable to Evergy, Inc.	879.7	618.3	669.9
Evergy Kansas Central
OPERATING REVENUES	2,847.3	2,418.1	2,507.4
OPERATING EXPENSES:
Fuel and purchased power	638.7	427.6	493
SPP network transmission costs	290.4	263.2	251.3
Operating and maintenance	530.8	513.6	530.5
Depreciation and amortization	467.2	453.1	443.8
Taxes other than income tax	203.9	193.3	192.3
Total Operating Expenses	2,131	1,850.8	1,910.9
INCOME FROM OPERATIONS	716.3	567.3	596.5
OTHER INCOME (EXPENSE):
Investment earnings	1.3	4.8	4.1
Other income	27	21.4	23.1
Other expense	(35.9)	(38.9)	(40.1)
Total Other Expense, Net	(7.6)	(12.7)	(12.9)
Interest expense	160.3	167.6	177
INCOME BEFORE INCOME TAXES	548.4	387	406.6
Income tax expense	51.7	155.8	52.1
Equity in earnings of equity method investees, net of income taxes	4	4.6	4.6
NET INCOME	500.7	235.8	359.1
Less: Net income attributable to noncontrolling interests	12.2	11.7	15.7
Net income attributable to Evergy, Inc.	$ 488.5	$ 224.1	$ 343.4

Consolidated Balance Sheets - E

Consolidated Balance Sheets - Evergy Kansas Central, Inc - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
CURRENT ASSETS:
Cash and cash equivalents	$ 26.2	$ 144.9
Receivables, net of allowance for credit losses of $13.0 and $7.5, respectively	221.6	273.9
Accounts receivable pledged as collateral	319	360
Fuel inventory and supplies	566.7	504.5
Income taxes receivable	28	62.9
Regulatory assets	424.1	206.2
Prepaid expenses	49.3	48.2
Total Current Assets	1,710.3	1,624.3
PROPERTY, PLANT AND EQUIPMENT, NET	21,002.6	19,951
OTHER ASSETS:
Regulatory assets	1,991.1	1,868.2
Nuclear decommissioning trust fund	768.7	652.1
Other	563.4	527.7
Total Other Assets	5,659.8	5,384.6
TOTAL ASSETS	28,520.5	27,114.8
CURRENT LIABILITIES:
Current maturities of long-term debt	389.3	436.4
Notes payable and commercial paper	1,159.3	315
Collateralized note payable	319	360
Accounts payable	639.7	654
Accrued taxes	150.4	143.8
Accrued interest	118.8	123.4
Regulatory liabilities	70.7	26.1
Asset retirement obligations	19.5	40.2
Accrued compensation and benefits	51.6	55.5
Other	184.6	182.6
Total Current Liabilities	3,102.9	2,355.8
LONG-TERM LIABILITIES:
Long-term debt, net	9,297.9	9,190.9
Deferred income taxes	1,861.9	1,664.8
Unamortized investment tax credits	181.4	186.7
Regulatory liabilities	2,705	2,638.8
Pension and post-retirement liability	879.1	1,149.4
Asset retirement obligations	940.6	901.7
Other	310	308.2
Total Long-Term Liabilities	16,175.9	16,040.5
Commitments and Contingencies (Note 14)
Evergy, Inc. Shareholders' Equity:
Common stock	7,205.5	7,080
Retained earnings	2,082.9	1,702.8
Total Evergy, Inc. Shareholders' Equity	9,244.4	8,733.4
Noncontrolling Interests	(2.7)	(14.9)
Total Equity	9,241.7	8,718.5
TOTAL LIABILITIES AND EQUITY	28,520.5	27,114.8
Evergy Kansas Central
CURRENT ASSETS:
Cash and cash equivalents	3.1	28.7
Receivables, net of allowance for credit losses of $13.0 and $7.5, respectively	201.6	218.9
Related party receivables	21.2	6.7
Accounts receivable pledged as collateral	153	180
Fuel inventory and supplies	283.2	276.4
Income taxes receivable	9.6	25.3
Regulatory assets	257.3	96.2
Prepaid expenses	41	27.4
Total Current Assets	970	859.6
PROPERTY, PLANT AND EQUIPMENT, NET	10,548.9	10,193.6
OTHER ASSETS:
Regulatory assets	753.6	800.1
Nuclear decommissioning trust fund	368.4	309.8
Other	286.9	271.1
Total Other Assets	1,408.9	1,381
TOTAL ASSETS	13,075.6	12,589.1
CURRENT LIABILITIES:
Current maturities of long-term debt	0	0
Notes payable and commercial paper	406	50
Collateralized note payable	153	180
Accounts payable	232.2	280.1
Related party payables	27.5	21.7
Accrued taxes	106.1	101.5
Accrued interest	71.5	72.8
Regulatory liabilities	12.8	11.9
Asset retirement obligations	7.3	11.2
Accrued compensation and benefits	13.8	11.1
Other	126.3	133.5
Total Current Liabilities	1,156.5	892.6
LONG-TERM LIABILITIES:
Long-term debt, net	3,934.2	3,931.5
Deferred income taxes	867.9	824.5
Unamortized investment tax credits	61.7	65.7
Regulatory liabilities	1,469.4	1,461
Pension and post-retirement liability	435.6	560.3
Asset retirement obligations	436.6	416
Other	172.2	156.7
Total Long-Term Liabilities	7,377.6	7,415.7
Commitments and Contingencies (Note 14)
Evergy, Inc. Shareholders' Equity:
Common stock	2,737.6	2,737.6
Retained earnings	1,806.6	1,558.1
Total Evergy, Inc. Shareholders' Equity	4,544.2	4,295.7
Noncontrolling Interests	(2.7)	(14.9)
Total Equity	4,541.5	4,280.8
TOTAL LIABILITIES AND EQUITY	13,075.6	12,589.1
Consolidated Entity Excluding Variable Interest Entities (VIE)
CURRENT LIABILITIES:
Current maturities of long-term debt	389.3	436.4
LONG-TERM LIABILITIES:
Long-term debt, net	9,297.9	9,190.9
Consolidated Entity Excluding Variable Interest Entities (VIE) | Evergy Kansas Central
CURRENT ASSETS:
PROPERTY, PLANT AND EQUIPMENT, NET	10,548.9	10,193.6
LONG-TERM LIABILITIES:
Long-term debt, net	3,934.2	3,931.5
Variable Interest Entities
CURRENT ASSETS:
PROPERTY, PLANT AND EQUIPMENT, NET	147.8	154.9
CURRENT LIABILITIES:
Current maturities of long-term debt	0	18.8
Accrued interest	0	0.1
Variable Interest Entities | Evergy Kansas Central
CURRENT ASSETS:
PROPERTY, PLANT AND EQUIPMENT, NET	147.8	154.9
CURRENT LIABILITIES:
Current maturities of long-term debt	$ 0	$ 18.8

Consolidated Balance Sheets -_2

Consolidated Balance Sheets - Evergy Kansas Central, Inc (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Allowance for credit losses	$ 32.9	$ 19.3
Common stock - shares authorized (in shares)	600,000,000	600,000,000
Common stock - shares issued (in shares)	229,299,900	226,836,670
Evergy Kansas Central
Allowance for credit losses	$ 13	$ 7.5
Common stock - shares authorized (in shares)	1,000	1,000
Common stock - par value (in dollars per share)	$ 0.01	$ 0.01
Common stock - shares issued (in shares)	1	1

Consolidated Statements of Ca_2

Consolidated Statements of Cash Flows - Evergy Kansas Central, Inc - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
CASH FLOWS FROM (USED IN) OPERATING ACTIVITIES:
Net income	$ 891.9	$ 630	$ 685.6
Adjustments to reconcile income to net cash from operating activities:
Depreciation and amortization	896.4	880.1	861.7
Amortization of nuclear fuel	51.4	58.3	51.4
Amortization of deferred refueling outage	25.1	25.4	25.5
Amortization of corporate-owned life insurance	24.1	20.1	19.8
Non-cash compensation	15.6	16	16.3
Net deferred income taxes and credits	102.2	126.9	121.5
Allowance for equity funds used during construction	(29.4)	(17.2)	(2.2)
Payments for asset retirement obligations	(22.6)	(18.4)	(17.8)
Equity in earnings of equity method investees, net of income taxes	(8.2)	(8.3)	(9.8)
Income from corporate-owned life insurance	(14.2)	(8.2)	(29.6)
Other	(13.8)	0.8	(3.2)
Changes in working capital items:
Accounts receivable	69.9	(4.9)	(23.1)
Accounts receivable pledged as collateral	41	(21)	26
Fuel inventory and supplies	(61.6)	(22.3)	29.9
Prepaid expenses and other current assets	(299.8)	16.9	43.4
Accounts payable	(55.1)	134.3	16.9
Accrued taxes	41.4	6.7	(8.2)
Other current liabilities	(19.4)	(98.9)	(59.4)
Changes in other assets	(251.5)	119.5	79.8
Changes in other liabilities	(31.7)	(82)	(75.5)
Cash Flows from Operating Activities	1,351.7	1,753.8	1,749
CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES:
Additions to property, plant and equipment	(1,972.5)	(1,560.3)	(1,210.1)
Purchase of securities - trusts	(158.2)	(65.6)	(55.8)
Sale of securities - trusts	115.7	56.5	47.3
Investment in corporate-owned life insurance	(14.2)	(19.1)	(18.3)
Proceeds from investment in corporate-owned life insurance	77	65.9	161.7
Other investing activities	38.4	(11.1)	(5.1)
Cash Flows used in Investing Activities	(1,913.8)	(1,533.7)	(1,080.3)
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES:
Short-term debt, net	840.5	(246.9)	(176.7)
Collateralized short-term debt, net	(41)	21	(26)
Proceeds from long-term debt	497.3	888.8	2,372.7
Retirements of long-term debt	(432)	(251.1)	(701.1)
Retirements of long-term debt of variable interest entities	(18.8)	(32.3)	(30.3)
Borrowings against cash surrender value of corporate-owned life insurance	54.4	55.5	59.4
Repayment of borrowings against cash surrender value of corporate-owned life insurance	(62.3)	(54.8)	(127.5)
Cash dividends paid	(497.9)	(465)	(462.5)
Distributions to shareholders of noncontrolling interests	0	0	(8.6)
Other financing activities	(9.3)	(13.6)	(6.7)
Cash Flows from (used in) Financing Activities	443.4	(98.4)	(805.8)
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(118.7)	121.7	(137.1)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH:
Beginning of period	144.9	23.2	160.3
End of period	26.2	144.9	23.2
Evergy Kansas Central
CASH FLOWS FROM (USED IN) OPERATING ACTIVITIES:
Net income	500.7	235.8	359.1
Adjustments to reconcile income to net cash from operating activities:
Depreciation and amortization	467.2	453.1	443.8
Amortization of nuclear fuel	25.6	28.8	25.6
Amortization of deferred refueling outage	12.6	12.7	12.8
Amortization of corporate-owned life insurance	24.1	20.1	19.8
Net deferred income taxes and credits	(1.4)	146.6	11.6
Allowance for equity funds used during construction	(14.9)	(9.1)	0
Payments for asset retirement obligations	(6.2)	(2.2)	(14.8)
Equity in earnings of equity method investees, net of income taxes	(4)	(4.6)	(4.6)
Income from corporate-owned life insurance	(14.2)	(8.2)	(29)
Other	(5.5)	(5.5)	(5.5)
Changes in working capital items:
Accounts receivable	23.5	(33.8)	(65.9)
Accounts receivable pledged as collateral	27	(9)	14
Fuel inventory and supplies	(6.2)	(9.4)	10.9
Prepaid expenses and other current assets	(196.1)	10	(11.7)
Accounts payable	(39.1)	111.6	6.9
Accrued taxes	20.3	(6.7)	20.2
Other current liabilities	(55)	(95.5)	12.1
Changes in other assets	(48.3)	42.9	47
Changes in other liabilities	(10)	(30.2)	(29.5)
Cash Flows from Operating Activities	700.1	847.4	822.8
CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES:
Additions to property, plant and equipment	(835.7)	(719)	(596.1)
Purchase of securities - trusts	(129.9)	(20.2)	(21.8)
Sale of securities - trusts	97.5	18.6	21.6
Investment in corporate-owned life insurance	(14.2)	(18.3)	(17.6)
Proceeds from investment in corporate-owned life insurance	77	63.8	158.9
Other investing activities	26.5	(2.2)	(3.2)
Cash Flows used in Investing Activities	(778.8)	(677.3)	(458.2)
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES:
Short-term debt, net	354	(199.2)	(162.5)
Collateralized short-term debt, net	(27)	9	(14)
Proceeds from long-term debt	0	492.7	294.7
Retirements of long-term debt	0	(250)	(300)
Retirements of long-term debt of variable interest entities	(18.8)	(32.3)	(30.3)
Borrowings against cash surrender value of corporate-owned life insurance	51.4	52.7	56.5
Repayment of borrowings against cash surrender value of corporate-owned life insurance	(62.3)	(53.7)	(125.4)
Cash dividends paid	(240)	(160)	(110)
Distributions to shareholders of noncontrolling interests	0	0	(8.6)
Other financing activities	(4.2)	(5.8)	(4.3)
Cash Flows from (used in) Financing Activities	53.1	(146.6)	(403.9)
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(25.6)	23.5	(39.3)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH:
Beginning of period	28.7	5.2	44.5
End of period	$ 3.1	$ 28.7	$ 5.2

Consolidated Statements of Ch_3

Consolidated Statements of Changes in Equity - Evergy Kansas Central, Inc - USD ($) $ in Millions	Total	Common Stock	Retained earnings	Non-controlling interests	Evergy Kansas Central	Evergy Kansas CentralCommon Stock	Evergy Kansas CentralRetained earnings	Evergy Kansas CentralNon-controlling interests
Beginning balance (in shares) at Dec. 31, 2018		255,326,252				1
Beginning balance at Dec. 31, 2018	$ 9,990.7	$ 8,685.2	$ 1,346	$ (37.5)	$ 3,960.7	$ 2,737.6	$ 1,260.6	$ (37.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	685.6		669.9	15.7	359.1		343.4	15.7
Dividends declared on common stock	(462.5)		(462.5)		(110)		(110)
Consolidation of noncontrolling interests	3.8			3.8	3.8			3.8
Distributions to shareholders of noncontrolling interests	(8.6)			(8.6)	(8.6)			(8.6)
Ending balance (in shares) at Dec. 31, 2019		226,641,443				1
Ending balance at Dec. 31, 2019	8,545.3	$ 7,070.4	1,551.5	(26.6)	4,205	$ 2,737.6	1,494	(26.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	630		618.3	11.7	235.8		224.1	11.7
Dividends declared on common stock	(465)		(465)		(160)		(160)
Ending balance (in shares) at Dec. 31, 2020		226,836,670				1
Ending balance at Dec. 31, 2020	8,718.5	$ 7,080	1,702.8	(14.9)	4,280.8	$ 2,737.6	1,558.1	(14.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	891.9		879.7	12.2	500.7		488.5	12.2
Dividends declared on common stock	(497.9)		(497.9)		(240)		(240)
Ending balance (in shares) at Dec. 31, 2021		229,299,900				1
Ending balance at Dec. 31, 2021	$ 9,241.7	$ 7,205.5	$ 2,082.9	$ (2.7)	$ 4,541.5	$ 2,737.6	$ 1,806.6	$ (2.7)

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income - Evergy Metro, Inc - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
OPERATING REVENUES	$ 5,586.7	$ 4,913.4	$ 5,147.8
OPERATING EXPENSES:
Fuel and purchased power	1,557	1,099	1,265
Operating and maintenance	1,107.5	1,163	1,218.5
Depreciation and amortization	896.4	880.1	861.7
Taxes other than income tax	380.5	364.2	365.5
Total Operating Expenses	4,231.8	3,769.5	3,962
INCOME FROM OPERATIONS	1,354.9	1,143.9	1,185.8
OTHER INCOME (EXPENSE):
Investment earnings	59.9	10.8	11
Other income	46.3	31.3	26.9
Other expense	(87.4)	(78.2)	(76.9)
Total Other Expense, Net	18.8	(36.1)	(39)
Interest expense	372.6	383.9	374
INCOME BEFORE INCOME TAXES	1,001.1	723.9	772.8
Income tax expense	117.4	102.2	97
Net income attributable to Evergy, Inc.	879.7	618.3	669.9
Derivative hedging activity
Reclassification to expenses, net of tax	5.5	3	1.5
Derivative hedging activity, net of tax	5.5	3	(46.4)
Total other comprehensive loss	5.4	0.6	(47)
COMPREHENSIVE INCOME	885.1	618.9	622.9
Evergy Metro
OPERATING REVENUES	1,913.7	1,705.6	1,806.5
OPERATING EXPENSES:
Fuel and purchased power	613.5	416.1	482.1
Operating and maintenance	365.4	407.5	451.9
Depreciation and amortization	321	326.1	318.4
Taxes other than income tax	126.2	121.6	127.6
Total Operating Expenses	1,426.1	1,271.3	1,380
INCOME FROM OPERATIONS	487.6	434.3	426.5
OTHER INCOME (EXPENSE):
Investment earnings	0.2	1.4	2.4
Other income	16.1	9.2	3.2
Other expense	(29.4)	(25.5)	(21.4)
Total Other Expense, Net	(13.1)	(14.9)	(15.8)
Interest expense	109.8	113.6	119.8
INCOME BEFORE INCOME TAXES	364.7	305.8	290.9
Income tax expense	52.4	7.1	35.7
Net income attributable to Evergy, Inc.	312.3	298.7	255.2
Derivative hedging activity
Reclassification to expenses, net of tax	(0.3)	(0.2)	0.7
Derivative hedging activity, net of tax	(0.3)	(0.2)	0.7
Total other comprehensive loss	(0.3)	(0.2)	0.7
COMPREHENSIVE INCOME	$ 312	$ 298.5	$ 255.9

Consolidated Balance Sheets -_3

Consolidated Balance Sheets - Evergy Metro, Inc - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
CURRENT ASSETS:
Cash and cash equivalents	$ 26.2	$ 144.9
Receivables, net of allowance for credit losses of $13.3 and $8.1, respectively	221.6	273.9
Accounts receivable pledged as collateral	319	360
Fuel inventory and supplies	566.7	504.5
Income taxes receivable	28	62.9
Regulatory assets	424.1	206.2
Other assets	75.4	23.7
Total Current Assets	1,710.3	1,624.3
PROPERTY, PLANT AND EQUIPMENT, NET	21,002.6	19,951
OTHER ASSETS:
Regulatory assets	1,991.1	1,868.2
Nuclear decommissioning trust fund	768.7	652.1
Other	563.4	527.7
Total Other Assets	5,659.8	5,384.6
TOTAL ASSETS	28,520.5	27,114.8
CURRENT LIABILITIES:
Current maturities of long-term debt	389.3	436.4
Notes payable and commercial paper	1,159.3	315
Collateralized note payable	319	360
Accounts payable	639.7	654
Accrued taxes	150.4	143.8
Accrued interest	118.8	123.4
Regulatory liabilities	70.7	26.1
Asset retirement obligations	19.5	40.2
Accrued compensation and benefits	51.6	55.5
Other	184.6	182.6
Total Current Liabilities	3,102.9	2,355.8
LONG-TERM LIABILITIES:
Long-term debt, net	9,297.9	9,190.9
Deferred income taxes	1,861.9	1,664.8
Unamortized investment tax credits	181.4	186.7
Regulatory liabilities	2,705	2,638.8
Pension and post-retirement liability	879.1	1,149.4
Asset retirement obligations	940.6	901.7
Other	310	308.2
Total Long-Term Liabilities	16,175.9	16,040.5
Commitments and Contingencies (Note 14)
EQUITY:
Common stock	7,205.5	7,080
Retained earnings	2,082.9	1,702.8
Accumulated other comprehensive loss	(44)	(49.4)
Total Evergy, Inc. Shareholders' Equity	9,244.4	8,733.4
TOTAL LIABILITIES AND EQUITY	28,520.5	27,114.8
Evergy Metro
CURRENT ASSETS:
Cash and cash equivalents	2.1	71.6
Receivables, net of allowance for credit losses of $13.3 and $8.1, respectively	31	45
Related party receivables	277.8	225.6
Accounts receivable pledged as collateral	116	130
Fuel inventory and supplies	211	170.4
Income taxes receivable	0	3.2
Regulatory assets	86.3	82
Prepaid expenses	22.6	22.9
Other assets	19.7	14.2
Total Current Assets	766.5	764.9
PROPERTY, PLANT AND EQUIPMENT, NET	7,474.9	7,141.2
OTHER ASSETS:
Regulatory assets	410.7	533.5
Nuclear decommissioning trust fund	400.3	342.3
Other	104.4	133.9
Total Other Assets	915.4	1,009.7
TOTAL ASSETS	9,156.8	8,915.8
CURRENT LIABILITIES:
Current maturities of long-term debt	0	0
Collateralized note payable	116	130
Accounts payable	305.2	280.1
Related party payables	0.1	0.1
Accrued taxes	38.6	34.9
Accrued interest	26.4	30
Regulatory liabilities	54.6	8
Asset retirement obligations	11	21.2
Accrued compensation and benefits	37.8	44.4
Other	48.8	37.3
Total Current Liabilities	638.5	586
LONG-TERM LIABILITIES:
Long-term debt, net	2,925	2,923
Deferred income taxes	606.1	558.8
Unamortized investment tax credits	117.2	118.5
Regulatory liabilities	954.2	899.4
Pension and post-retirement liability	420.9	565.1
Asset retirement obligations	370	357.7
Other	103.7	148.1
Total Long-Term Liabilities	5,497.1	5,570.6
Commitments and Contingencies (Note 14)
EQUITY:
Common stock	1,563.1	1,563.1
Retained earnings	1,453.8	1,191.5
Accumulated other comprehensive loss	4.3	4.6
Total Evergy, Inc. Shareholders' Equity	3,021.2	2,759.2
TOTAL LIABILITIES AND EQUITY	$ 9,156.8	$ 8,915.8

Consolidated Balance Sheets -_4

Consolidated Balance Sheets - Evergy Metro, Inc (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Allowance for credit losses	$ 32.9	$ 19.3	$ 10.5
Common stock - shares authorized (in shares)	600,000,000	600,000,000
Common stock - shares issued (in shares)	229,299,900	226,836,670
Evergy Metro
Allowance for credit losses	$ 13.3	$ 8.1	$ 4.6
Common stock - shares authorized (in shares)	1,000	1,000
Common stock - shares issued (in shares)	1	1

Consolidated Statements of Ca_3

Consolidated Statements of Cash Flows - Evergy Metro, Inc - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
CASH FLOWS FROM (USED IN) OPERATING ACTIVITIES:
Net income	$ 891.9	$ 630	$ 685.6
Adjustments to reconcile income to net cash from operating activities:
Depreciation and amortization	896.4	880.1	861.7
Amortization of nuclear fuel	51.4	58.3	51.4
Amortization of deferred refueling outage	25.1	25.4	25.5
Net deferred income taxes and credits	102.2	126.9	121.5
Allowance for equity funds used during construction	(29.4)	(17.2)	(2.2)
Payments for asset retirement obligations	(22.6)	(18.4)	(17.8)
Other	(13.8)	0.8	(3.2)
Changes in working capital items:
Accounts receivable	69.9	(4.9)	(23.1)
Accounts receivable pledged as collateral	41	(21)	26
Fuel inventory and supplies	(61.6)	(22.3)	29.9
Prepaid expenses and other current assets	(299.8)	16.9	43.4
Accounts payable	(55.1)	134.3	16.9
Accrued taxes	41.4	6.7	(8.2)
Other current liabilities	(19.4)	(98.9)	(59.4)
Changes in other assets	(251.5)	119.5	79.8
Changes in other liabilities	(31.7)	(82)	(75.5)
Cash Flows from Operating Activities	1,351.7	1,753.8	1,749
CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES:
Additions to property, plant and equipment	(1,972.5)	(1,560.3)	(1,210.1)
Purchase of securities - trusts	(158.2)	(65.6)	(55.8)
Sale of securities - trusts	115.7	56.5	47.3
Other investing activities	38.4	(11.1)	(5.1)
Cash Flows used in Investing Activities	(1,913.8)	(1,533.7)	(1,080.3)
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES:
Short-term debt, net	840.5	(246.9)	(176.7)
Collateralized short-term debt, net	(41)	21	(26)
Proceeds from long-term debt	497.3	888.8	2,372.7
Retirements of long-term debt	(432)	(251.1)	(701.1)
Cash dividends paid	(497.9)	(465)	(462.5)
Other financing activities	(9.3)	(13.6)	(6.7)
Cash Flows from (used in) Financing Activities	443.4	(98.4)	(805.8)
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(118.7)	121.7	(137.1)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH:
Beginning of period	144.9	23.2	160.3
End of period	26.2	144.9	23.2
Evergy Metro
CASH FLOWS FROM (USED IN) OPERATING ACTIVITIES:
Net income	312.3	298.7	255.2
Adjustments to reconcile income to net cash from operating activities:
Depreciation and amortization	321	326.1	318.4
Amortization of nuclear fuel	25.8	29.5	25.9
Amortization of deferred refueling outage	12.6	12.7	12.8
Net deferred income taxes and credits	10	(3.5)	(30.6)
Allowance for equity funds used during construction	(12.6)	(8)	(2.2)
Payments for asset retirement obligations	(7.4)	(7.5)	(2.5)
Other	(0.4)	(0.4)	0.3
Changes in working capital items:
Accounts receivable	43.2	(13.2)	37
Accounts receivable pledged as collateral	14	(12)	12
Fuel inventory and supplies	(40.6)	(7.4)	14.6
Prepaid expenses and other current assets	(16.3)	(7.9)	28
Accounts payable	(1.1)	24.6	9.1
Accrued taxes	6.9	1.6	(9.6)
Other current liabilities	44	2.4	(53.2)
Changes in other assets	61.5	59.1	33.7
Changes in other liabilities	(38.7)	(47.3)	(34.7)
Cash Flows from Operating Activities	734.2	647.5	614.2
CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES:
Additions to property, plant and equipment	(682.9)	(565.4)	(445)
Purchase of securities - trusts	(28.3)	(45.4)	(34)
Sale of securities - trusts	18.2	37.9	25.7
Net money pool lending	(55)	(100)	0
Other investing activities	6.8	4.6	9
Cash Flows used in Investing Activities	(741.2)	(668.3)	(444.3)
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES:
Short-term debt, net	0	(199.3)	22.4
Collateralized short-term debt, net	(14)	12	(12)
Proceeds from long-term debt	0	396.2	393.2
Retirements of long-term debt	0	0	(400)
Cash dividends paid	(50)	(120)	(175)
Other financing activities	1.5	1.5	0.9
Cash Flows from (used in) Financing Activities	(62.5)	90.4	(170.5)
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(69.5)	69.6	(0.6)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH:
Beginning of period	71.6	2	2.6
End of period	$ 2.1	$ 71.6	$ 2

Consolidated Statements of Ch_4

Consolidated Statements of Changes in Equity - Evergy Metro, Inc - USD ($) $ in Millions	Total	Common Stock	Retained earnings	Evergy Metro	Evergy MetroCommon Stock	Evergy MetroRetained earnings	Evergy MetroAOCI - Net gains (losses) on cash flow hedges
Beginning balance (in shares) at Dec. 31, 2018		255,326,252			1
Beginning balance at Dec. 31, 2018	$ 9,990.7	$ 8,685.2	$ 1,346	$ 2,499.8	$ 1,563.1	$ 932.6	$ 4.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	685.6		669.9	255.2		255.2
Dividends declared on common stock	(462.5)		(462.5)	(175)		(175)
Derivative hedging activity, net of tax	(46.4)			0.7			0.7
Ending balance (in shares) at Dec. 31, 2019		226,641,443			1
Ending balance at Dec. 31, 2019	8,545.3	$ 7,070.4	1,551.5	2,580.7	$ 1,563.1	1,012.8	4.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	630		618.3	298.7		298.7
Dividends declared on common stock	(465)		(465)	(120)		(120)
Derivative hedging activity, net of tax	3			(0.2)			(0.2)
Ending balance (in shares) at Dec. 31, 2020		226,836,670			1
Ending balance at Dec. 31, 2020	8,718.5	$ 7,080	1,702.8	2,759.2	$ 1,563.1	1,191.5	4.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	891.9		879.7	312.3		312.3
Dividends declared on common stock	(497.9)		(497.9)	(50)		(50)
Derivative hedging activity, net of tax	5.5			(0.3)			(0.3)
Ending balance (in shares) at Dec. 31, 2021		229,299,900			1
Ending balance at Dec. 31, 2021	$ 9,241.7	$ 7,205.5	$ 2,082.9	$ 3,021.2	$ 1,563.1	$ 1,453.8	$ 4.3

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Organization Evergy is a public utility holding company incorporated in 2017 and headquartered in Kansas City, Missouri. Evergy operates primarily through the following wholly-owned direct subsidiaries listed below. • Evergy Kansas Central, Inc. (Evergy Kansas Central) is an integrated, regulated electric utility that provides electricity to customers in the state of Kansas. Evergy Kansas Central has one active wholly-owned subsidiary with significant operations, Evergy Kansas South, Inc. (Evergy Kansas South). • Evergy Metro, Inc. (Evergy Metro) is an integrated, regulated electric utility that provides electricity to customers in the states of Missouri and Kansas. • Evergy Missouri West, Inc. (Evergy Missouri West) is an integrated, regulated electric utility that provides electricity to customers in the state of Missouri. • Evergy Transmission Company, LLC (Evergy Transmission Company) owns 13.5% of Transource Energy, LLC (Transource) with the remaining 86.5% owned by AEP Transmission Holding Company, LLC, a subsidiary of American Electric Power Company, Inc. (AEP). Transource is focused on the development of competitive electric transmission projects. Evergy Transmission Company accounts for its investment in Transource under the equity method. Evergy Kansas Central also owns a 50% interest in Prairie Wind Transmission, LLC (Prairie Wind), which is a joint venture between Evergy Kansas Central and subsidiaries of AEP and Berkshire Hathaway Energy Company. Prairie Wind owns a 108-mile, 345 kV double-circuit transmission line that provides transmission service in the Southwest Power Pool, Inc. (SPP). Evergy Kansas Central accounts for its investment in Prairie Wind under the equity method. Evergy Kansas Central, Evergy Kansas South, Evergy Metro and Evergy Missouri West conduct business in their respective service territories using the name Evergy. Collectively, the Evergy Companies have approximately 15,400 MWs of owned generating capacity and renewable power purchase agreements and engage in the generation, transmission, distribution and sale of electricity to approximately 1.6 million customers in the states of Kansas and Missouri. Principles of Consolidation Each of Evergy's, Evergy Kansas Central's and Evergy Metro's consolidated financial statements includes the accounts of their subsidiaries and variable interest entities (VIEs) of which they are the primary beneficiary. Undivided interests in jointly-owned generation facilities are included on a proportionate basis. Intercompany transactions have been eliminated. The Evergy Companies assess financial performance and allocate resources on a consolidated basis (i.e., operate in one segment). Evergy Metro elected not to apply "push-down accounting" related to the Great Plains Energy Incorporated (Great Plains Energy) and Evergy Kansas Central merger in 2018, whereby the adjustments of assets and liabilities to fair value and the resulting goodwill would be recorded on the financial statements of the acquired subsidiary. These adjustments for Evergy Metro, as well as those related to the acquired assets and liabilities of Great Plains Energy and its other direct subsidiaries, are only reflected on Evergy's consolidated financial statements. Use of Estimates The process of preparing financial statements in conformity with generally accepted accounting principles (GAAP) requires the use of estimates and assumptions that affect the reported amounts of certain types of assets, liabilities, revenues and expenses. Such estimates primarily relate to unsettled transactions and events as of the date of the financial statements. Accordingly, upon settlement, actual results may differ from estimated amounts. Cash and Cash Equivalents Cash equivalents consist of highly liquid investments with original maturities of three months or less at acquisition. Fuel Inventory and Supplies The Evergy Companies record fuel inventory and supplies at average cost. The following table separately states the balances for fuel inventory and supplies. December 31 2021 2020 Evergy (millions) Fuel inventory $ 160.9 $ 145.0 Supplies 405.8 359.5 Fuel inventory and supplies $ 566.7 $ 504.5 Evergy Kansas Central Fuel inventory $ 74.3 $ 79.3 Supplies 208.9 197.1 Fuel inventory and supplies $ 283.2 $ 276.4 Evergy Metro Fuel inventory $ 62.0 $ 44.9 Supplies 149.0 125.5 Fuel inventory and supplies $ 211.0 $ 170.4 Property, Plant and Equipment The Evergy Companies record the value of property, plant and equipment, including that of VIEs, at cost. For plant, cost includes contracted services, direct labor and materials, indirect charges for engineering and supervision and an allowance for funds used during construction (AFUDC). AFUDC represents the allowed cost of capital used to finance utility construction activity. AFUDC equity funds are included as a non-cash item in other income and AFUDC borrowed funds are a reduction of interest expense. AFUDC is computed by applying a composite rate to qualified construction work in progress. The rates used to compute gross AFUDC are compounded semi-annually. The amounts of the Evergy Companies' AFUDC for borrowed and equity funds are detailed in the following table. 2021 2020 2019 Evergy (millions) AFUDC borrowed funds $ 14.7 $ 16.5 $ 14.5 AFUDC equity funds 29.4 17.2 2.2 Total $ 44.1 $ 33.7 $ 16.7 Evergy Kansas Central AFUDC borrowed funds $ 7.1 $ 8.5 $ 7.5 AFUDC equity funds 14.9 9.1 — Total $ 22.0 $ 17.6 $ 7.5 Evergy Metro AFUDC borrowed funds $ 6.0 $ 6.0 $ 4.3 AFUDC equity funds 12.6 8.0 2.2 Total $ 18.6 $ 14.0 $ 6.5 The average rates used in the calculation of AFUDC are detailed in the following table. 2021 2020 2019 Evergy Kansas Central 4.9% 4.7% 3.0% Evergy Metro 5.6% 5.2% 4.6% Evergy Missouri West 2.6% 3.5% 3.7% When property units are retired or otherwise disposed, the original cost, net of salvage, is charged to accumulated depreciation. Repair of property and replacement of items not considered to be units of property are expensed as incurred, except for planned refueling and maintenance outages at Wolf Creek Generating Station (Wolf Creek). As authorized by regulators, the incremental maintenance cost incurred for such outages is deferred and amortized to expense ratably over the period between planned outages. Depreciation and Amortization Depreciation and amortization of utility plant other than nuclear fuel is computed using the straight-line method over the estimated lives of depreciable property based on rates approved by state regulatory authorities. Annual depreciation rates average approximately 3%. See Note 7 for more details. Nuclear fuel is amortized to fuel expense based on the quantity of heat produced during the generation of electricity. The depreciable lives of Evergy's, Evergy Kansas Central's and Evergy Metro's property, plant and equipment are detailed in the following table. Evergy Evergy Kansas Central Evergy Metro (years) Generating facilities 8 to 87 8 to 87 20 to 60 Transmission facilities 15 to 94 36 to 94 15 to 70 Distribution facilities 8 to 73 19 to 73 8 to 55 Other 5 to 84 7 to 84 5 to 50 Plant to be Retired, Net When the Evergy Companies retire utility plant, the original cost, net of salvage, is charged to accumulated depreciation. However, when it becomes probable an asset will be retired significantly in advance of its original expected useful life and in the near term, the cost of the asset and related accumulated depreciation is recognized as a separate asset and a probable abandonment. If the asset is still in service, the net amount is classified as plant to be retired, net on the consolidated balance sheets. If the asset is no longer in service, the net amount is classified as a regulatory asset on the consolidated balance sheets. The Evergy Companies must also assess the probability of full recovery of the remaining net book value of the abandonment. The net book value that may be retained as an asset on the balance sheet for the abandonment is dependent upon amounts that may be recovered through regulated rates, including any return. An impairment charge, if any, would equal the difference between the remaining net book value of the asset and the present value of the future revenues expected from the asset. Evergy Missouri West has determined that its November 2018 retirement of Sibley No. 3 Unit meets the criteria to be considered an abandonment. As of December 31, 2021, Evergy has classified the remaining Sibley No. 3 Unit net book value of $123.4 million as retired generation facilities within regulatory assets on its consolidated balance sheet. This regulatory asset is reduced by approximately $9 million of annual amortization expense, which is an amount equal to the annual depreciation expense for the asset reflected in retail rates. In October 2019, the Missouri Public Service Commission (MPSC) granted the request of certain intervenors for an Accounting Authority Order (AAO) that requires Evergy Missouri West to record a regulatory liability for all revenues collected from customers for return on investment, non-fuel operations and maintenance costs, taxes including accumulated deferred income taxes and all other costs associated with Sibley Station following the station's retirement in November 2018 for consideration in Evergy Missouri West's current rate case, which was filed in January 2022. See Note 4 for additional information regarding the AAO and Evergy Missouri West's current rate case. Evergy Missouri West expects that the MPSC's decision in its current rate case regarding the AAO could impact the valuation of its regulatory asset for retired generation facilities but as of December 31, 2021, has concluded that no impairment is required based on the relevant facts and circumstances. Nuclear Plant Decommissioning Costs Nuclear plant decommissioning cost estimates are based on either the immediate dismantlement method or the deferred dismantling method as determined by the State Corporation Commission of the State of Kansas (KCC) and MPSC and include the costs of decontamination, dismantlement and site restoration. Based on these cost estimates, Evergy Kansas Central and Evergy Metro each contribute to a tax-qualified trust fund to be used to decommission Wolf Creek. Related liabilities for decommissioning are included on Evergy's, Evergy Kansas Central's and Evergy Metro's consolidated balance sheets in asset retirement obligations (AROs). As a result of the authorized regulatory treatment and related regulatory accounting, differences between the fair value of the assets held in the nuclear decommissioning trust and the amounts recorded for the accumulated accretion and depreciation expense associated with the decommissioning ARO are recorded as a regulatory liability on Evergy's, Evergy Kansas Central's and Evergy Metro's consolidated balance sheets. See Note 6 for discussion of AROs including those associated with nuclear plant decommissioning costs. Regulatory Accounting Accounting standards are applied that recognize the economic effects of rate regulation. Accordingly, regulatory assets and liabilities have been recorded when required by a regulatory order or based on regulatory precedent. See Note 4 for additional information concerning regulatory matters. Cash Surrender Value of Life Insurance Amounts related to corporate-owned life insurance (COLI) are recorded on the consolidated balance sheets in other long-term assets and are detailed in the following table for Evergy. Substantially all of Evergy's COLI-related balances relate to Evergy Kansas Central's COLI activity. December 31 2021 2020 Evergy (millions) Cash surrender value of policies $ 1,363.0 $ 1,369.6 Borrowings against policies (1,232.3) (1,237.6) Corporate-owned life insurance, net $ 130.7 $ 132.0 Increases in cash surrender value and death benefits are recorded in other income in the Evergy Companies' consolidated statements of income and comprehensive income. Interest expense incurred on policy loans is offset against the policy income. Income from death benefits is highly variable from period to period. Fair Value of Financial Instruments The following methods and assumptions were used to estimate the fair value of the following financial instruments for which it was practicable to estimate that value. Nuclear decommissioning trust fund - The Evergy Companies' nuclear decommissioning trust fund assets are recorded at fair value based on quoted market prices of the investments held by the fund and/or valuation models. Pension plans - For financial reporting purposes, the market value of plan assets is the fair value based on quoted market prices of the investments held by the fund and/or valuation models. Revenue Recognition The Evergy Companies recognize revenue on the sale of electricity to customers over time as the service is provided in the amount they have the right to invoice. Revenues recorded include electric services provided but not yet billed by the Evergy Companies. Unbilled revenues are recorded for kWh usage in the period following the customers' billing cycle to the end of the month. This estimate is based on net system kWh usage less actual billed kWhs. The Evergy Companies' estimated unbilled kWhs are allocated and priced by regulatory jurisdiction across the rate classes based on actual billing rates. The Evergy Companies' unbilled revenue estimate is affected by factors including fluctuations in energy demand, weather, line losses and changes in the composition of customer classes. See Note 3 for the balance of unbilled receivables for each of Evergy, Evergy Kansas Central and Evergy Metro as of December 31, 2021 and 2020. The Evergy Companies also collect sales taxes and franchise fees from customers concurrent with revenue-producing activities that are levied by state and local governments. These items are excluded from revenue, and thus are not reflected on the consolidated statements of income and comprehensive income for Evergy, Evergy Kansas Central and Evergy Metro. See Note 2 for additional details regarding revenue recognition from sales of electricity by the Evergy Companies. Allowance for Credit Losses Historical loss information generally provides the basis for the Evergy Companies' assessment of expected credit losses. The Evergy Companies use an aging of accounts receivable method to assess historical loss information. When historical experience may not fully reflect the Evergy Companies' expectations about the future, the Evergy Companies will adjust historical loss information, as necessary, to reflect the current conditions and reasonable and supportable forecasts not already reflected in the historical loss information. Receivables are charged off when they are deemed uncollectible, which is based on a number of factors including specific facts surrounding an account and management's judgment. Asset Impairments Long-lived assets and finite-lived intangible assets subject to amortization are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. If the sum of the undiscounted expected future cash flows from an asset to be held and used is less than the carrying value of the asset, an asset impairment must be recognized in the financial statements. The amount of impairment recognized is the excess of the carrying value of the asset over its fair value. Goodwill and indefinite lived intangible assets are tested for impairment annually and when an event occurs indicating the possibility that an impairment exists. The annual test must be performed at the same time each year. The goodwill impairment test consists of comparing the fair value of a reporting unit to its carrying amount, including goodwill, to identify potential impairment. In the event that the carrying amount exceeds the fair value of the reporting unit, an impairment loss is recognized for the difference between the carrying amount of the reporting unit and its fair value. See Note 5 for additional details on goodwill. Income Taxes Income taxes are accounted for using the asset/liability approach. Deferred tax assets and liabilities are determined based on the temporary differences between the financial reporting and tax bases of assets and liabilities, applying enacted statutory tax rates in effect for the year in which the differences are expected to reverse. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion of the deferred tax assets will not be realized. The Evergy Companies recognize tax benefits based on a "more-likely-than-not" recognition threshold. In addition, the Evergy Companies recognize interest accrued related to unrecognized tax benefits in interest expense and penalties in operating expenses. Evergy files a consolidated federal income tax return as well as unitary and combined income tax returns in several state jurisdictions with Kansas and Missouri being the most significant. Income taxes for consolidated or combined subsidiaries are allocated to the subsidiaries based on separate company computations of income or loss. Evergy Kansas Central's and Evergy Metro's income tax provisions include taxes allocated based on their separate company's income or loss. The Evergy Companies have established a net regulatory liability for future refunds to be made to customers for amounts collected from customers in excess of income taxes in current rates. Tax credits are recognized in the year generated except for certain Evergy Kansas Central, Evergy Metro and Evergy Missouri West investment tax credits that have been deferred and amortized over the remaining service lives of the related properties. Other Income (Expense), Net In 2021, Evergy's investment earnings included a $27.7 million unrealized gain related to Evergy’s investment in an early-stage energy solutions company. See “Evergy Equity Investment” in this Note 1 for further information. The Evergy Companies’ other income includes income from AFUDC equity funds. See “Property, Plant and Equipment” in this Note 1 for these amounts for 2021, 2020 and 2019. The table below shows the detail of other expense for each of the Evergy Companies. 2021 2020 2019 Evergy (millions) Non-service cost component of net benefit cost $ (55.6) $ (58.6) $ (55.6) Other (31.8) (19.6) (21.3) Other expense $ (87.4) $ (78.2) $ (76.9) Evergy Kansas Central Non-service cost component of net benefit cost $ (15.6) $ (21.2) $ (20.1) Other (20.3) (17.7) (20.0) Other expense $ (35.9) $ (38.9) $ (40.1) Evergy Metro Non-service cost component of net benefit cost $ (26.7) $ (24.2) $ (20.9) Other (2.7) (1.3) (0.5) Other expense $ (29.4) $ (25.5) $ (21.4) Earnings Per Share To compute basic earnings per share (EPS), Evergy divides net income attributable to Evergy, Inc. by the weighted average number of common shares outstanding. Diluted EPS includes the effect of issuable common shares resulting from restricted share units (RSUs), restricted stock and a warrant. Evergy computes the dilutive effects of potential issuances of common shares using the treasury stock method or the contingently issuable share method, as applicable. The following table reconciles Evergy's basic and diluted EPS. 2021 2020 2019 Income (millions, except per share amounts) Net income $ 891.9 $ 630.0 $ 685.6 Less: Net income attributable to noncontrolling interests 12.2 11.7 15.7 Net income attributable to Evergy, Inc. $ 879.7 $ 618.3 $ 669.9 Common Shares Outstanding Weighted average number of common shares outstanding - basic 229.0 227.2 239.5 Add: effect of dilutive securities 0.6 0.3 0.4 Diluted average number of common shares outstanding 229.6 227.5 239.9 Basic EPS $ 3.84 $ 2.72 $ 2.80 Diluted EPS $ 3.83 $ 2.72 $ 2.79 There were no anti-dilutive securities excluded from the computation of diluted EPS for 2021. Anti-dilutive shares excluded from the computation of diluted EPS for 2020 and 2019 were 127,884 RSUs and 785 RSUs, respectively. Supplemental Cash Flow Information Year Ended December 31 2021 2020 2019 Evergy (millions) Cash paid for (received from): Interest, net of amount capitalized $ 356.9 $ 367.6 $ 329.5 Interest of VIEs 0.2 0.8 1.6 Income taxes, net of refunds (19.6) (46.5) (5.2) Non-cash investing transactions: Property, plant and equipment additions 269.3 463.3 186.0 Non-cash financing transactions: Issuance of stock for compensation and reinvested dividends 0.7 0.9 (0.3) Year Ended December 31 2021 2020 2019 Evergy Kansas Central (millions) Cash paid for (received from): Interest, net of amount capitalized $ 149.3 $ 157.5 $ 143.0 Interest of VIEs 0.2 0.8 1.6 Income taxes, net of refunds 37.5 4.7 29.9 Non-cash investing transactions: Property, plant and equipment additions 101.9 235.4 92.1 Year Ended December 31 2021 2020 2019 Evergy Metro (millions) Cash paid for (received from): Interest, net of amount capitalized $ 110.8 $ 109.9 $ 118.4 Income taxes, net of refunds 36.6 4.8 77.0 Non-cash investing transactions: Property, plant and equipment additions 102.2 192.5 80.7 Non-cash property, plant and equipment additions in 2020 for Evergy, Evergy Kansas Central and Evergy Metro include a non-cash addition related to the revision in estimate of the Wolf Creek ARO liability in the third quarter of 2020. See Note 6 for more details. Dividends Declared In February 2022, Evergy's Board of Directors (Evergy Board) declared a quarterly dividend of $0.5725 per share on Evergy's common stock. The common dividend is payable March 21, 2022, to shareholders of record as of March 7, 2022. In February 2022, Evergy Kansas Central's Board of Directors declared a cash dividend to Evergy of up to $25.0 million, payable on March 18, 2022. February 2021 Winter Weather Event In February 2021, much of the central and southern United States, including the service territories of the Evergy Companies, experienced a significant winter weather event that resulted in extremely cold temperatures over a multi-day period (February 2021 winter weather event). The February 2021 winter weather event resulted in an increase in the demand for natural gas used by the Evergy Companies for generating electricity and also contributed to the limited availability of other generation resources, including coal and renewables, within the SPP Integrated Marketplace. The Evergy Companies are members of the SPP and, as a result, principally sell and purchase power for the Evergy Companies' retail electric customers through the SPP Integrated Marketplace. These circumstances resulted in higher than normal market prices for both natural gas and power for the duration of the February 2021 winter weather event. These higher than normal market prices also included make-whole payments calculated by the SPP to compensate natural gas generators within the SPP Integrated Marketplace for costs incurred in excess of revenues. As part of the February 2021 winter weather event and inclusive of the aforementioned items, Evergy incurred natural gas and purchased power costs, net of wholesale revenues, of $365.5 million. This $365.5 million of net fuel and purchased power costs was primarily driven by $296.4 million of costs at Evergy Missouri West and $133.9 million of costs at Evergy Kansas Central, partially offset by $64.8 million of net wholesale revenues at Evergy Metro. The amount of purchased power costs incurred by the Evergy Companies during the February 2021 winter weather event is subject to resettlement activity and further review by the SPP. This review and any subsequent resettlement activity could result in increases or decreases to the final amount of purchased power costs incurred by the Evergy Companies during the February 2021 winter weather event and these changes could be material. The Evergy Companies have fuel recovery mechanisms in their Kansas and Missouri jurisdictions, as applicable, that allow them to defer substantially all of any increased fuel and purchased power costs, net of wholesale revenues, to a regulatory asset or liability for future recovery from or refund to customers. Further, in February 2021, the KCC issued an emergency AAO that allowed Evergy Kansas Central and Evergy Metro's Kansas jurisdiction to defer to a regulatory asset any extraordinary costs, including carrying costs, incurred to provide electric service during the February 2021 winter weather event for consideration in future rate proceedings. Additionally, in June 2021, Evergy Metro and Evergy Missouri West filed a joint request for an AAO with the MPSC that would allow for the extraordinary costs and revenues to provide service during the February 2021 winter weather event, including carrying costs, to be deferred to a regulatory asset or a regulatory liability for consideration in future proceedings. See Note 4 for additional information regarding the AAOs. As of December 31, 2021, the Evergy Companies have deferred substantially all of the fuel and purchased power costs, net of wholesale revenues, related to the February 2021 winter weather event to a regulatory asset or liability pursuant to the mechanisms discussed above. While the Evergy Companies expect to recover substantially all of any increased fuel and purchased power costs related to the February 2021 winter weather event from customers, the timing of the cost recovery could be delayed or spread over a longer than typical recovery timeframe by the KCC or the MPSC to help moderate monthly customer bill impacts given the extraordinary nature of the February 2021 winter weather event. The Evergy Companies also engage in limited non-regulated energy marketing activities in various regional power markets that have historically not had a significant impact on the Evergy Companies' results of operations. These energy marketing margins are recorded net in operating revenues on the Evergy Companies' statements of income and comprehensive income. As a result of the elevated market prices experienced in regional power markets across the central and southern United States driven by the February 2021 winter weather event discussed above, Evergy and Evergy Kansas Central recorded $94.5 million of energy marketing margins in 2021 related to the February 2021 winter weather event, primarily driven by activities in the Electric Reliability Council of Texas (ERCOT). Evergy Equity Investment From time to time, Evergy makes limited equity investments in early-stage energy solution companies. These investments have historically not had a significant impact on Evergy's results of operations. In October 2021, an equity investment in which Evergy held a minority stake through an initial investment of $3.7 million was acquired through a transaction involving a special purpose acquisition company (SPAC). As a result of its equity investment in the company that was acquired in the SPAC transaction, Evergy received shares of the resulting public company upon the closing of the transaction, which are subject to a restriction on sale of up for 150 days. Evergy recorded a $27.7 million unrealized gain in the fourth quarter of 2021 for the conversion of its shares into the newly formed public company and based on the closing share price as of December 31, 2021 adjusted to reflect the restriction on the sale of the shares. The fair value of Evergy's investment is largely dependent on the performance of the new public company's stock, which is subject to significant market volatility and is also affected by the restriction on sale of the shares until March 2022, when the restriction expires.

REVENUE

REVENUE	12 Months Ended
	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
REVENUE	REVENUE Evergy's, Evergy Kansas Central's and Evergy Metro's revenues disaggregated by customer class are summarized in the following tables. Evergy 2021 2020 2019 Revenues (millions) Residential $ 1,918.3 $ 1,909.2 $ 1,908.1 Commercial 1,681.3 1,641.7 1,781.6 Industrial 597.0 588.7 621.6 Other retail 33.1 38.5 47.1 Total electric retail $ 4,229.7 $ 4,178.1 $ 4,358.4 Wholesale 717.2 264.0 327.5 Transmission 356.8 318.5 309.2 Industrial steam and other 25.4 21.0 24.5 Total revenue from contracts with customers $ 5,329.1 $ 4,781.6 $ 5,019.6 Other 257.6 131.8 128.2 Operating revenues $ 5,586.7 $ 4,913.4 $ 5,147.8 Evergy Kansas Central 2021 2020 2019 Revenues (millions) Residential $ 824.1 $ 801.2 $ 793.9 Commercial 694.1 665.6 709.1 Industrial 391.7 379.9 401.3 Other retail 17.1 17.7 21.0 Total electric retail $ 1,927.0 $ 1,864.4 $ 1,925.3 Wholesale 453.1 215.4 239.9 Transmission 322.9 287.3 273.3 Other 2.2 2.3 5.8 Total revenue from contracts with customers $ 2,705.2 $ 2,369.4 $ 2,444.3 Other 142.1 48.7 63.1 Operating revenues $ 2,847.3 $ 2,418.1 $ 2,507.4 Evergy Metro 2021 2020 2019 Revenues (millions) Residential $ 691.9 $ 714.7 $ 712.4 Commercial 713.3 717.1 786.1 Industrial 122.0 128.8 136.9 Other retail 9.2 11.7 16.3 Total electric retail $ 1,536.4 $ 1,572.3 $ 1,651.7 Wholesale 242.6 35.0 70.9 Transmission 17.1 13.9 17.5 Other 3.6 2.6 2.8 Total revenue from contracts with customers $ 1,799.7 $ 1,623.8 $ 1,742.9 Other 114.0 81.8 63.6 Operating revenues $ 1,913.7 $ 1,705.6 $ 1,806.5 Retail Revenues The Evergy Companies' retail revenues are generated by the regulated sale of electricity to their residential, commercial and industrial customers within their franchised service territories. The Evergy Companies recognize revenue on the sale of electricity to their customers over time as the service is provided in the amount they have a right to invoice. Retail customers are billed monthly at the tariff rates approved by the KCC and MPSC based on customer kWh usage. Revenues recorded include electric services provided but not yet billed by the Evergy Companies. Unbilled revenues are recorded for kWh usage in the period following the customers' billing cycle to the end of the month. This estimate is based on net system kWh usage less actual billed kWhs. The Evergy Companies' estimated unbilled kWhs are allocated and priced by regulatory jurisdiction across the rate classes based on actual billing rates. The Evergy Companies also collect sales taxes and franchise fees from customers concurrent with revenue-producing activities that are levied by state and local governments. These items are excluded from revenue, and thus not reflected on the statements of income and comprehensive income, for Evergy, Evergy Kansas Central and Evergy Metro. Wholesale Revenues The Evergy Companies' wholesale revenues are generated by the sale of wholesale power and capacity in circumstances when the power that the Evergy Companies generate is not required for customers in their service territory. These sales primarily occur within the SPP Integrated Marketplace. The Evergy Companies also purchase power from the SPP Integrated Marketplace and record sale and purchase activity on a net basis in wholesale revenue or fuel and purchased power expense. In addition, the Evergy Companies sell wholesale power and capacity through bilateral contracts to other counterparties, such as electric cooperatives, municipalities and other electric utilities. For both wholesale sales to the SPP Integrated Marketplace and through bilateral contracts, the Evergy Companies recognize revenue on the sale of wholesale electricity to their customers over time as the service is provided in the amount they have a right to invoice. Wholesale sales within the SPP Integrated Marketplace are billed weekly based on the fixed transaction price determined by the market at the time of the sale and the MWh quantity purchased. Wholesale sales from bilateral contracts are billed monthly based on the contractually determined transaction price and the kWh quantity purchased. Transmission Revenues The Evergy Companies' transmission revenues are generated by the use of their transmission networks by the SPP. To enable optimal use of the diverse generating resources in the SPP region, the Evergy Companies, as well as other transmission owners, allow the SPP to access and operate their transmission networks. As new transmission lines are constructed, they are included in the transmission network available to the SPP. In exchange for providing access, the SPP pays the Evergy Companies consideration determined by formula rates approved by the Federal Energy Regulatory Commission (FERC), which include the cost to construct and maintain the transmission lines and a return on investment. The price for access to the Evergy Companies' transmission networks are updated annually based on projected costs. Projections are updated to actual costs and the difference is included in subsequent year's prices. The Evergy Companies have different treatment for their legacy transmission facilities within the SPP, which results in different levels of transmission revenue being received from the SPP. Evergy Kansas Central's transmission revenues from SPP include amounts that Evergy Kansas Central pays to the SPP on behalf of its retail electric customers for the use of Evergy Kansas Central's legacy transmission facilities. These transmission revenues are mostly offset by SPP network transmission cost expense that Evergy Kansas Central pays on behalf of its retail customers. Evergy Metro and Evergy Missouri West do not pay the SPP for their retail customers’ use of the Evergy Metro and Evergy Missouri West legacy transmission facilities and correspondingly, their transmission revenues also do not reflect the associated transmission revenue from the SPP. The Evergy Companies recognize revenue on the sale of transmission service to their customers over time as the service is provided in the amount they have a right to invoice. Transmission service to the SPP is billed monthly based on a fixed transaction price determined by FERC formula transmission rates along with other SPP-specific charges and the MW quantity purchased. Industrial Steam and Other Revenues Evergy's industrial steam and other revenues are primarily generated by the regulated sale of industrial steam to Evergy Missouri West's steam customers. Evergy recognizes revenue on the sale of industrial steam to its customers over time as the service is provided in the amount that it has the right to invoice. Steam customers are billed on a monthly basis at the tariff rate approved by the MPSC based on customer MMBtu usage.

RECEIVABLES

RECEIVABLES	12 Months Ended
	Dec. 31, 2021
Receivables [Abstract]
RECEIVABLES	RECEIVABLES The Evergy Companies' receivables are detailed in the following table. December 31 2021 2020 Evergy (millions) Customer accounts receivable - billed $ 13.7 $ 5.3 Customer accounts receivable - unbilled 80.1 110.0 Other receivables 160.7 177.9 Allowance for credit losses (32.9) (19.3) Total $ 221.6 $ 273.9 Evergy Kansas Central Customer accounts receivable - billed $ 9.7 $ — Customer accounts receivable - unbilled 26.4 50.7 Other receivables 178.5 175.7 Allowance for credit losses (13.0) (7.5) Total $ 201.6 $ 218.9 Evergy Metro Customer accounts receivable - billed $ 2.7 $ 3.3 Customer accounts receivable - unbilled 25.9 27.9 Other receivables 15.7 21.9 Allowance for credit losses (13.3) (8.1) Total $ 31.0 $ 45.0 The Evergy Companies' other receivables at December 31, 2021 and 2020, consisted primarily of receivables from partners in jointly-owned electric utility plants, wholesale sales receivables and receivables related to alternative revenue programs. The Evergy Companies' other receivables also included receivables from contracts with customers as summarized in the following table. December 31 2021 2020 (millions) Evergy $ 63.7 $ 57.5 Evergy Kansas Central 62.6 49.9 Evergy Metro 0.5 6.9 The change in the Evergy Companies' allowance for credit losses is summarized in the following table. 2021 2020 Evergy (millions) Beginning balance January 1 $ 19.3 $ 10.5 Credit loss expense 28.0 24.9 Write-offs (26.4) (28.6) Recoveries of prior write-offs 12.0 12.5 Ending balance December 31 $ 32.9 $ 19.3 Evergy Kansas Central Beginning balance January 1 $ 7.5 $ 3.8 Credit loss expense 12.0 11.1 Write-offs (11.0) (10.0) Recoveries of prior write-offs 4.5 2.6 Ending balance December 31 $ 13.0 $ 7.5 Evergy Metro Beginning balance January 1 $ 8.1 $ 4.6 Credit loss expense 10.5 9.0 Write-offs (10.6) (12.4) Recoveries of prior write-offs 5.3 6.9 Ending balance December 31 $ 13.3 $ 8.1 Sale of Accounts Receivable Evergy Kansas Central, Evergy Metro and Evergy Missouri West sell an undivided percentage ownership interest in their retail electric accounts receivable to independent outside investors. These sales are accounted for as secured borrowings with accounts receivable pledged as collateral and a corresponding short-term collateralized note payable recognized on the balance sheets. The Evergy Companies' accounts receivable pledged as collateral and the corresponding short-term collateralized note payable are summarized in the following table. December 31 2021 2020 (millions) Evergy $ 319.0 $ 360.0 Evergy Kansas Central 153.0 180.0 Evergy Metro 116.0 130.0 Each receivable sale facility expires in 2024. Evergy Kansas Central's facility allows for $185.0 million in aggregate outstanding principal amount of borrowings from mid-October through mid-June and then $200.0 million from mid-June through mid-October. Evergy Metro's facility allows for $130.0 million in aggregate outstanding principal amount of borrowings at any time. Evergy Missouri West's facility allows for $50.0 million in aggregate outstanding principal amount of borrowings from mid-November through mid-June and then $65.0 million from mid-June through mid-November.

RATE MATTERS AND REGULATION

RATE MATTERS AND REGULATION	12 Months Ended
	Dec. 31, 2021
Regulated Operations [Abstract]
RATE MATTERS AND REGULATION	RATE MATTERS AND REGULATION KCC Proceedings Evergy Kansas Central 2021 Transmission Delivery Charge (TDC) In April 2021, the KCC issued an order adjusting Evergy Kansas Central's retail prices to include updated transmission costs as reflected in the FERC transmission formula rate (TFR). The new prices were effective in April 2021 and are expected to increase Evergy Kansas Central's annual retail revenues by $37.9 million when compared to 2020. Evergy Metro 2021 TDC In April 2021, the KCC issued an order adjusting Evergy Metro's retail prices to include updated transmission costs as reflected in the FERC TFR. The new prices were effective in May 2021 and are expected to decrease Evergy Metro's annual retail revenues by $2.4 million when compared to 2020. Evergy Kansas Central and Evergy Metro Earnings Review and Sharing Plan (ERSP) As part of their merger settlement agreement with the KCC, Evergy Kansas Central and Evergy Metro agreed to participate in an ERSP for the years 2019 through 2022. Under the ERSP, Evergy Kansas Central's and Evergy Metro's Kansas jurisdiction are required to refund to customers 50% of annual earnings in excess of their authorized return on equity of 9.3% to the extent the excess earnings exceed the amount of annual bill credits that Evergy Kansas Central and Evergy Metro agreed to provide in connection with the merger that resulted in the formation of Evergy. Evergy Kansas Central's and Evergy Metro's 2020 calculations of annual earnings did not result in a significant refund obligation. As of December 31, 2021, Evergy Kansas Central estimates its 2021 annual earnings will not result in a refund obligation. As of December 31, 2021, Evergy Metro estimates its 2021 annual earnings will result in a $2.0 million refund obligation. The final refund obligations for 2021 will be decided by the KCC and could vary from the current estimates. Evergy Kansas Central and Evergy Metro February 2021 Winter Weather Event AAO In February 2021, the KCC issued an emergency AAO directing all Kansas-jurisdictional natural gas and electric utilities, including Evergy Kansas Central and Evergy Metro, to defer to a regulatory asset or regulatory liability any extraordinary costs or revenues, including carrying costs, to provide electric service during the February 2021 winter weather event for consideration in future rate proceedings. As of December 31, 2021, Evergy Kansas Central had recognized a regulatory asset pursuant to the AAO of $121.5 million related to its costs incurred during the February 2021 winter weather event, primarily consisting of increased fuel and purchased power costs. As of December 31, 2021, Evergy Metro's Kansas jurisdiction had recognized a regulatory liability of $39.5 million related to its increased wholesale revenues during the February 2021 winter weather event. In July 2021, Evergy Kansas Central and Evergy Metro made a joint filing with the KCC regarding the timing and method of recovery or refund for costs and revenues deferred pursuant to the February 2021 winter weather event AAO. In the filing, Evergy Kansas Central and Evergy Metro requested to recover or refund, as appropriate, their deferred February 2021 winter weather event amounts to customers through their fuel recovery mechanisms over two years and one year, respectively, beginning in April 2022. As part of the filing, Evergy Metro also requested an approximately $6 million decrease to its February 2021 winter weather event refund to Kansas customers, which is not currently reflected in its regulatory liability for the February 2021 winter weather event, for jurisdictional allocation differences in its Kansas and Missouri fuel recovery mechanisms. In January 2022, KCC staff filed their report and recommendation regarding the February 2021 winter weather event and the related costs and revenues deferred by Evergy Kansas Central and Evergy Metro as a result of the AAO granted by the KCC in February 2021. The report concluded that the costs incurred and revenues earned by Evergy Kansas Central and Evergy Metro during the February 2021 winter weather event were prudent. The KCC staff also recommended the following: (1) that Evergy Metro extend the time period of its refund to customers from one year to two years; (2) that the KCC reject the approximately $6 million reduction in refund to customers requested by Evergy Metro due to jurisdictional allocation differences in its Kansas and Missouri fuel recovery mechanisms and (3) that Evergy Metro and the other active parties in the case work to determine the appropriate level of carrying charges that should apply to the amounts deferred related to the February 2021 winter weather event. A decision by the KCC regarding Evergy Kansas Central’s and Evergy Metro’s joint filing is expected in the first half of 2022 . Lawrence Energy Center (LEC) Unit 4 Securitization In April 2021, the state of Kansas passed the Utility Financing and Securitization Act (UFSA) which allows certain public utilities, including Evergy Kansas Central and Evergy Metro, to securitize utility assets in order to recover energy transition costs relating to the early retirement of certain generating assets. To recover the energy transition costs through securitization as allowed in the UFSA, a public utility must obtain a predetermination order from the KCC finding that the retirement of the subject generation facility is reasonable. Upon the receipt of a successful predetermination order, the public utility must then file an application with the KCC for a financing order to issue securitized bonds to recover the energy transition costs. The UFSA also allows the pursuit of securitization to help finance qualified extraordinary expenses, such as fuel costs incurred during extreme weather events. In September 2021, Evergy Kansas Central filed a predetermination request with the KCC for the ratemaking principles and treatment related to its planned investment in approximately 190 MW of solar generation and the planned retirement of coal-fired LEC Unit 4 and related coal-handling facilities for LEC Units 4 and 5, both of which are expected to occur between December 2023 and the first half of 2024. In February 2022, Evergy Kansas Central withdrew its predetermination request with the KCC in order to finalize definitive documentation associated with the solar investment and to develop additional information to enable the KCC to evaluate its predetermination request. Evergy Kansas Central anticipates refiling its predetermination request, including this additional information, later in 2022. If the KCC finds that Evergy Kansas Central's planned retirement of LEC Unit 4 and investment in 190 MW of solar generation is prudent as part of a predetermination request, Evergy Kansas Central then plans to file an application with the KCC for a financing order authorizing the issuance of securitized bonds to recover energy transition costs associated with the retirement of LEC Unit 4 and the related coal-handling facilities for LEC Units 4 and 5. MPSC Proceedings Evergy Metro 2022 Rate Case Proceeding In January 2022, Evergy Metro filed an application with the MPSC to request an increase to its retail revenues of $43.9 million before rebasing fuel and purchased power expense, with a return on equity of 10% and a rate-making equity ratio of 51.19%. The request reflects increases related to higher property taxes and the recovery of infrastructure investments made to improve reliability and enhance customer service and were also partially offset by significant customer savings and cost reductions created since the Great Plains Energy and Evergy Kansas Central merger in 2018. Evergy Metro also requested an additional $3.8 million increase associated with rebasing fuel and purchased power expense as well as the implementation of tracking mechanisms for both property tax expense and credit loss expense and the creation of a storm reserve as part of its application with the MPSC. An evidentiary hearing in the case is expected to occur in September 2022 and new rates are expected to be effective in December 2022. Evergy Missouri West 2022 Rate Case Proceeding In January 2022, Evergy Missouri West filed an application with the MPSC to request an increase to its retail revenues of $27.7 million before rebasing fuel and purchased power expense, with a return on equity of 10% and a rate-making equity ratio of 51.81%. The request reflects increases related to higher property taxes and the recovery of infrastructure investments made to improve reliability and enhance customer service and were also partially offset by significant customer savings and cost reductions created since the Great Plains Energy and Evergy Kansas Central merger in 2018. Evergy Missouri West also requested an additional $32.1 million increase associated with rebasing fuel and purchased power expense, the implementation of tracking mechanisms for both property tax expense and credit loss expense, the creation of a storm reserve, and the full return of and return on its unrecovered investment related to the 2018 retirement of Sibley Station as part of its application with the MPSC. An evidentiary hearing in the case is expected to occur in September 2022 and new rates are expected to be effective in December 2022 . Evergy Missouri West Other Proceedings In December 2018, the Office of the Public Counsel (OPC) and the Midwest Energy Consumers Group (MECG) filed a petition with the MPSC requesting an AAO that would require Evergy Missouri West to record a regulatory liability for all revenues collected from customers for return on investment, non-fuel operations and maintenance costs, taxes including accumulated deferred income taxes, and all other costs associated with Sibley Station following the station’s retirement in November 2018. In October 2019, the MPSC granted OPC's and MECG's request for an AAO and required Evergy Missouri West to record a regulatory liability for the revenues discussed above for consideration in Evergy Missouri West's current rate case. Depending on the MPSC's decision in the current rate case, Evergy Missouri West could be required to refund to customers all or a portion of amounts collected in revenue for Sibley Station since December 2018 or, alternatively, could be required to make no refunds. As part of its current rate case, Evergy Missouri West is proposing to refund to customers the revenues collected from customers for non-fuel operations and maintenance costs and other costs associated with Sibley Station following the station's retirement but not the return on investment. As a result of the MPSC order, Evergy has recorded a regulatory liability of $29.3 million as of December 31, 2021 for the estimated amount of revenues that Evergy Missouri West has collected from customers for Sibley Station since December 2018 that Evergy has determined is probable of refund. Evergy expects that it will continue to defer such amounts as collected from customers until new rates become effective in Evergy Missouri West's current rate case. The accrual for this estimated amount does not include certain revenues collected related to Sibley Station that Evergy has determined to not be probable of refund in the current rate case based on the relevant facts and circumstances. Although Evergy has determined these additional revenues to not be probable of refund, the ultimate resolution of this matter in Evergy Missouri West's current rate case is uncertain and could result in an estimated loss of approximately $50 million when new rates are expected to become effective in December 2022. Evergy's regulatory liability for probable refunds as of December 31, 2021 and estimated loss in excess of the amount accrued represent estimates that could change significantly based on ongoing developments including decisions in other regulatory proceedings that establish precedent applicable to this matter and positions of parties on this issue in Evergy Missouri West's 2022 rate case. Evergy Metro and Evergy Missouri West February 2021 Winter Weather Event AAO In June 2021, Evergy Metro and Evergy Missouri West filed a joint request for an AAO with the MPSC that would allow Evergy Metro and Evergy Missouri West to defer to a regulatory asset or regulatory liability any extraordinary costs or revenues, including carrying costs, to provide electric service during the February 2021 winter weather event for consideration in future proceedings. Evergy Metro and Evergy Missouri West have currently deferred substantially all of their fuel and purchased power costs, net of wholesale revenues, related to the February 2021 winter weather event to a regulatory asset or liability pursuant to their ability to recover or refund these amounts through their fuel recovery mechanisms, which allow for the recovery or refund of 95% of increases in fuel and purchased power costs, net of wholesale revenues, above the amount included in base rates to customers. This AAO request is intended to address the recovery or refund of the February 2021 winter weather event amounts separate from the normal fuel recovery mechanism process given the extraordinary nature of the February 2021 winter weather event and to help moderate customer bill impacts. As of December 31, 2021, Evergy Metro's Missouri jurisdiction had recognized a regulatory liability of $25.6 million related to its increased wholesale revenues during the February 2021 winter weather event. As of December 31, 2021, Evergy Missouri West had recognized a regulatory asset of $281.6 million related to its costs incurred during the February 2021 winter weather event, primarily consisting of increased fuel and purchased power costs. In the AAO filing, Evergy Metro requested to refund its deferred February 2021 winter weather event amounts to customers through its fuel recovery mechanism over one year, beginning in April 2022. In the same AAO filing, Evergy Missouri West requested to exclude its deferred February 2021 winter weather event amounts from recovery through its fuel recovery mechanism and indicated its intent to recover them through issuing securitized bonds pursuant to the securitization legislation signed into law in Missouri in July 2021. As part of the filing, Evergy Metro also requested an approximately $5 million decrease to its February 2021 winter weather refund to Missouri customers, which is not currently reflected in its regulatory liability for the February 2021 winter weather event, for jurisdictional allocation differences in its Kansas and Missouri fuel recovery mechanisms and for the portion of net wholesale revenues not traditionally refundable because of the 5% sharing provision of its fuel recovery mechanism. Evergy Missouri West requested an approximately $15 million increase to its February 2021 winter weather event recovery from Missouri customers, which is not currently reflected in its regulatory asset for the February 2021 winter weather event, for the portion of net fuel and purchased power costs not traditionally recoverable because of the 5% sharing provision of its fuel recovery mechanism. In September 2021, MPSC staff filed their recommendation regarding the February 2021 winter weather event and the related costs and revenues deferred by Evergy Metro and Evergy Missouri West. The MPSC staff recommended that the MPSC reject Evergy Metro’s AAO request, including the approximately $5 million reduction in refund to customers requested by Evergy Metro due to jurisdictional allocation differences in its Kansas and Missouri fuel recovery mechanisms, and refund the excess wholesale revenues from the February 2021 winter weather event to customers through its normal fuel recovery mechanism process. The MPSC staff recommended that the MPSC approve Evergy Missouri West’s AAO request, including the approximately $15 million of additional recovery requested related to the 5% sharing provision of its fuel recovery mechanism, but that the AAO deferral should not include carrying costs as they should be determined in a future ratemaking proceeding. A decision by the MPSC regarding Evergy Metro’s and Evergy Missouri West’s joint request is expected in the first half of 2022. FERC Proceedings In October of each year, Evergy Kansas Central and Evergy Metro post an updated TFR that includes projected transmission capital expenditures and operating costs for the following year. This rate is the most significant component in the retail rate calculation for Evergy Kansas Central's and Evergy Metro's annual request with the KCC to adjust retail prices to include updated transmission costs through the TDC. Evergy Kansas Central TFR In the most recent three years, the updated TFR was expected to adjust Evergy Kansas Central's annual transmission revenues by approximately: • $33.2 million increase effective in January 2022; • $32.4 million increase effective in January 2021; and • $6.8 million increase effective in January 2020. Evergy Metro TFR In the most recent three years, the updated TFR was expected to adjust Evergy Metro's annual transmission revenues by approximately: • $18.1 million increase effective in January 2022; • $3.9 million decrease effective in January 2021; and • $1.7 million decrease effective in January 2020. Regulatory Assets and Liabilities The Evergy Companies have recorded assets and liabilities on their consolidated balance sheets resulting from the effects of the ratemaking process, which would not otherwise be recorded if they were not regulated. Regulatory assets represent incurred costs that are probable of recovery from future revenues. Regulatory liabilities represent future reductions in revenues or refunds to customers. Management regularly assesses whether regulatory assets and liabilities are probable of future recovery or refund by considering factors such as decisions by the MPSC, KCC or FERC in Evergy Kansas Central's, Evergy Metro's and Evergy Missouri West's rate case filings; decisions in other regulatory proceedings, including decisions related to other companies that establish precedent on matters applicable to the Evergy Companies; and changes in laws and regulations. If recovery or refund of regulatory assets or liabilities is not approved by regulators or is no longer deemed probable, these regulatory assets or liabilities are recognized in the current period results of operations. The Evergy Companies continued ability to meet the criteria for recording regulatory assets and liabilities may be affected in the future by restructuring and deregulation in the electric industry or changes in accounting rules. In the event that the criteria no longer applied to any or all of the Evergy Companies' operations, the related regulatory assets and liabilities would be written off unless an appropriate regulatory recovery mechanism were provided. Additionally, these factors could result in an impairment on utility plant assets. The Evergy Companies' regulatory assets and liabilities are detailed in the following tables. December 31 2021 2020 Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Regulatory Assets (millions) Pension and post-retirement costs $ 567.2 $ 265.6 $ 213.3 $ 867.8 $ 412.9 $ 359.9 Debt reacquisition costs 94.4 86.7 6.7 98.9 91.3 6.8 Debt fair value adjustment 96.5 — — 104.0 — — Asset retirement obligations fair value 117.9 — — 116.2 — — Depreciation 98.5 50.1 27.0 70.0 52.7 9.4 Cost of removal 257.5 141.0 90.2 183.4 125.7 57.7 Asset retirement obligations 119.3 52.3 49.1 170.8 55.0 84.0 Analog meter unrecovered investment 18.4 18.4 — 24.1 24.1 — Treasury yield hedges 20.4 20.4 — 21.5 21.5 — Iatan No. 1 and common facilities 6.5 — 2.7 6.9 — 2.8 Iatan No. 2 construction accounting costs 24.7 — 12.4 25.4 — 12.7 Kansas property tax surcharge 39.6 31.6 8.0 28.9 23.7 5.2 Disallowed plant costs 14.2 14.2 — 14.5 14.5 — La Cygne environmental costs 11.2 9.0 2.2 12.4 10.1 2.3 Deferred customer programs 18.7 6.4 7.8 16.3 5.7 8.6 Fuel recovery mechanisms 202.5 120.8 19.8 26.2 1.2 17.7 February 2021 winter weather event 403.1 121.5 — — — — Solar rebates 20.2 — — 25.9 — 1.5 Wolf Creek outage 20.4 10.2 10.2 10.0 5.0 5.0 Pension and other post-retirement benefit 65.6 23.0 29.6 49.8 12.8 23.4 Retired generation facilities 123.4 — — 128.4 — — Merger transition costs 32.7 15.6 12.1 37.6 18.0 13.9 Other regulatory assets 42.3 24.1 5.9 35.4 22.1 4.6 Total 2,415.2 1,010.9 497.0 2,074.4 896.3 615.5 Less: current portion (424.1) (257.3) (86.3) (206.2) (96.2) (82.0) Total noncurrent regulatory assets $ 1,991.1 $ 753.6 $ 410.7 $ 1,868.2 $ 800.1 $ 533.5 December 31 2021 2020 Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Regulatory Liabilities (millions) Taxes refundable through future rates $ 1,969.5 $ 1,143.7 $ 616.1 $ 2,055.7 $ 1,184.5 $ 650.2 Deferred regulatory gain from sale 42.6 42.6 — 48.1 48.1 — Emission allowances 42.1 — 42.1 46.1 — 46.1 Nuclear decommissioning 400.1 175.7 224.4 319.7 138.2 181.5 Pension and post-retirement costs 44.4 23.2 15.9 50.8 31.4 13.1 Jurisdictional allowance for funds used 27.5 25.8 1.7 28.7 27.0 1.7 La Cygne leasehold dismantling costs 29.6 29.6 — 29.6 29.6 — Cost of removal — — — 4.4 — — Kansas tax credits 16.7 16.7 — — — — Purchase power agreement 5.8 5.8 — 6.3 6.3 — Fuel recovery mechanisms 6.5 — 6.5 1.3 — — February 2021 winter weather event 65.1 — 65.1 — — — Sibley AAO 29.3 — — 18.4 — — Other regulatory liabilities 96.5 19.1 37.0 55.8 7.8 14.8 Total 2,775.7 1,482.2 1,008.8 2,664.9 1,472.9 907.4 Less: current portion (70.7) (12.8) (54.6) (26.1) (11.9) (8.0) Total noncurrent regulatory liabilities $ 2,705.0 $ 1,469.4 $ 954.2 $ 2,638.8 $ 1,461.0 $ 899.4 The following summarizes the nature and period of recovery for each of the regulatory assets listed in the table above. Pension and post-retirement costs: Represents unrecognized gains and losses and prior service costs that will be recognized in future net periodic pension and post-retirement costs, pension settlements amortized over various periods and financial and regulatory accounting method differences that will be eliminated over the life of the pension plans. Of these amounts, $494.6 million, $265.6 million and $179.0 million for Evergy, Evergy Kansas Central and Evergy Metro, respectively, are not included in rate base and are amortized over various periods. Additionally, $219.7 million, $(11.6) million and $123.3 million for Evergy, Evergy Kansas Central and Evergy Metro, respectively, represent differences between pension and post-retirement costs under GAAP and pension and post-retirement costs for ratemaking that will be recovered or refunded in future rates and differences in accumulated unrecognized gains and losses and prior service costs between Evergy and Evergy Metro due to Evergy Metro electing not to apply "push-down accounting" related to the Great Plains Energy and Evergy Kansas Central merger. Debt reacquisition costs: Includes costs incurred to reacquire and refinance debt. These costs are amortized over the term of the new debt or the remaining lives of the old debt issuances if no new debt was issued and are not included in rate base. Debt fair value adjustment: Represents purchase accounting adjustments recorded to state the carrying value of Evergy Metro and Evergy Missouri West long-term debt at fair value in connection with the Great Plains Energy and Evergy Kansas Central merger. Amount is amortized over the life of the related debt and is not included in rate base. Asset retirement obligations fair value adjustment: Represents purchase accounting adjustments recorded to state the carrying value of Evergy Metro and Evergy Missouri West AROs at fair value in connection with the Great Plains Energy and Evergy Kansas Central merger. Amount is amortized over the life of the related plant and is not included in rate base. Depreciation: Represents the difference between regulatory depreciation expense and depreciation expense recorded for financial reporting purposes. These assets are included in rate base and the difference is amortized over the life of the related plant. Cost of removal: Represents amounts spent, but not yet collected, to dispose of plant assets. This asset will decrease as removal costs are collected in rates and is included in rate base. Asset retirement obligations: Represents amounts associated with AROs as discussed further in Note 6. These amounts are recovered over the life of the related plant and are not included in rate base. Analog meter unrecovered investment: Represents the deferral of unrecovered investment of retired analog meters. Of this amount, $10.1 million is not included in rate base for Evergy and Evergy Kansas Central and is being amortized over a five Treasury yield hedges: Represents the effective portion of treasury yield hedge transactions. Amortization of this amount will be included in interest expense over the term of the related debt and is not included in rate base. Iatan No. 1 and common facilities: Represents depreciation and carrying costs related to Iatan No. 1 and common facilities. These costs are included in rate base and amortized over various periods. Iatan No. 2 construction accounting costs: Represents the construction accounting costs related to Iatan No. 2. These costs are included in rate base and amortized through 2059. Kansas property tax surcharge: Represents actual costs incurred for property taxes in excess of amounts collected in revenues. These costs are expected to be recovered over a one Disallowed plant costs: The KCC originally disallowed certain costs related to the Wolf Creek plant. In 1987, the KCC revised its original conclusion and provided for recovery of an indirect disallowance with no return on investment. This regulatory asset represents the present value of the future expected revenues to be provided to recover these costs, net of the amounts amortized. La Cygne environmental costs: Represents the deferral of depreciation and amortization expense and associated carrying charges related to the La Cygne Station environmental project. This amount will be amortized over the life of the related asset and is included in rate base. Deferred customer programs: Represents costs related to various energy efficiency programs that have been accumulated and deferred for future recovery. Of these amounts, $12.3 million for Evergy and $7.8 million for Evergy Metro are not included in rate base and are amortized over various periods. Fuel recovery mechanisms: Represents the actual cost of fuel consumed in producing electricity and the cost of purchased power in excess of the amounts collected from customers. This difference is expected to be recovered over a one February 2021 winter weather event: Represents deferred extraordinary fuel and purchased power costs incurred to provide electric service as a result of the February 2021 winter weather event. These amounts are not included in rate base. Solar rebates: Represents costs associated with solar rebates provided to retail electric customers. These amounts are not included in rate base and are amortized over various periods. Wolf Creek outage: Represents deferred expenses associated with Wolf Creek's scheduled refueling and maintenance outages. These expenses are amortized during the period between planned outages and are not included in rate base. Pension and other post-retirement benefit non-service costs: Represents the non-service component of pension and post-retirement net benefit costs that are capitalized as authorized by regulators. The amounts are included in rate base and are recovered over the life of the related asset. Retired generation facilities: Represents amounts to be recovered for facilities that have been retired and are probable of recovery. Merger transition costs: Represents recoverable transition costs related to the merger. The amounts are not included in rate base and are recovered from retail customers through 2028. Other regulatory assets: Includes various regulatory assets that individually are small in relation to the total regulatory asset balance. These amounts have various recovery periods and are not included in rate base. The following summarizes the nature and period of amortization for each of the regulatory liabilities listed in the table above. Taxes refundable through future rates: Represents the obligation to return to customers income taxes recovered in earlier periods when corporate income tax rates were higher than current income tax rates. A large portion of this amount is related to depreciation and will be returned to customers over the life of the applicable property. Deferred regulatory gain from sale leaseback: Represents the gain Evergy Kansas South recorded on the 1987 sale and leaseback of its 50% interest in La Cygne Unit 2. The gain is amortized over the term of the lease. Emission allowances: Represents deferred gains related to the sale of emission allowances to be returned to customers. Nuclear decommissioning: Represents the difference between the fair value of the assets held in the nuclear decommissioning trust and the amount recorded for the accumulated accretion and depreciation expense associated with the asset retirement obligation related to Wolf Creek. Pension and post-retirement costs: Includes pension and post-retirement benefit obligations and expense recognized in setting prices in excess of actual pension and post-retirement expense. Jurisdictional allowance for funds used during construction: Represents AFUDC that is accrued subsequent to the time the associated construction charges are included in prices and prior to the time the related assets are placed in service. The AFUDC is amortized to depreciation expense over the useful life of the asset that is placed in service. La Cygne leasehold dismantling costs: Represents amounts collected but not yet spent on the contractual obligation to dismantle a portion of La Cygne Unit 2. The obligation will be discharged as the unit is dismantled. Cost of removal: Represents amount collected, but not yet spent, to dispose of plant assets. This liability will be discharged as removal costs are incurred. Kansas tax credits: Represents Kansas tax credits on investment in utility plant. Amounts will be credited to customers subsequent to the realization of the credits over the remaining lives of the utility plant giving rise to the tax credits. Purchase power agreement: Represents the amount included in retail electric rates from customers in excess of costs incurred under purchase power agreements. Amounts are amortized over a five Fuel recovery mechanisms: Represents the amount collected from customers in excess of the actual cost of fuel consumed in producing electricity and the cost of purchased power. This difference is expected to be refunded over a one February 2021 winter weather event: Represents the deferral of increased wholesale revenues earned during the February 2021 winter weather event. Sibley AAO: Represents the estimated amount of revenues that Evergy Missouri West has collected from customers for Sibley Station that Evergy has determined is probable of refund. These amounts were recorded in connection with an AAO granted by the MPSC in October 2019 and deferred amounts will be considered by the MPSC in Evergy Missouri West's 2022 rate case. Other regulatory liabilities: Includes various regulatory liabilities that individually are relatively small in relation to the total regulatory liability balance. These amounts will be credited over various periods.

GOODWILL

GOODWILL	12 Months Ended
	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL	GOODWILLGAAP requires goodwill to be tested for impairment annually and when an event occurs indicating the possibility that an impairment exists. Evergy's impairment test for the $2,336.6 million of goodwill that was recorded as a result of the Great Plains Energy and Evergy Kansas Central merger was conducted as of May 1, 2021. The goodwill impairment test consists of comparing the fair value of a reporting unit to its carrying amount, including goodwill, to identify potential impairment. In the event that the carrying amount exceeds the fair value of the reporting unit, an impairment loss is recognized for the difference between the carrying amount of the reporting unit and its fair value. Evergy's consolidated operations are considered one reporting unit for assessment of impairment, as management assesses financial performance and allocates resources on a consolidated basis. The determination of fair value of the reporting unit consisted of two valuation techniques: an income approach consisting of a discounted cash flow analysis and a market approach consisting of a determination of reporting unit invested capital using a market multiple derived from the historical earnings before interest, income taxes, depreciation and amortization and market prices of the stock of peer companies. The results of the two techniques were evaluated and weighted to determine a point within the range that management considered representative of fair value for the reporting unit. The fair value of the reporting unit exceeded the carrying amount, including goodwill. As a result, there was no impairment of goodwill.

ASSET RETIREMENT OBLIGATIONS

ASSET RETIREMENT OBLIGATIONS	12 Months Ended
	Dec. 31, 2021
Asset Retirement Obligation Disclosure [Abstract]
ASSET RETIREMENT OBLIGATIONS	ASSET RETIREMENT OBLIGATIONS AROs associated with tangible long-lived assets are legal obligations that exist under enacted laws, statutes and written or oral contracts, including obligations arising under the doctrine of promissory estoppel. These liabilities are recognized at estimated fair value as incurred with a corresponding amount capitalized as part of the cost of the related long-lived assets and depreciated over their useful lives. Accretion of the liabilities due to the passage of time is recorded to a regulatory asset and/or liability. Changes in the estimated fair values of the liabilities are recognized when known. Evergy Kansas Central, Evergy Metro and Evergy Missouri West have AROs related to asbestos abatement and the closure and post-closure care of ponds and landfills containing coal combustion residuals (CCRs). In addition, Evergy Kansas Central and Evergy Metro have AROs related to decommissioning Wolf Creek and the retirement of wind generation facilities. The MPSC and KCC require the owners of Wolf Creek, including Evergy Kansas South and Evergy Metro with their respective 47% ownership shares, to submit an updated decommissioning cost study every three years. The most recent study was submitted to the MPSC and KCC in September 2020. As a result of changes in estimates related to the study, Evergy, Evergy Kansas Central and Evergy Metro recorded increases to their AROs to decommission Wolf Creek of $259.1 million, $140.7 million and $118.4 million, respectively, in 2020. The following table summarizes the change in the Evergy Companies' AROs for the periods ending December 31, 2021 and 2020. Evergy Evergy Kansas Central Evergy Metro 2021 2020 2021 2020 2021 2020 (millions) Beginning balance January 1 $ 941.9 $ 674.1 $ 427.2 $ 272.9 $ 378.9 $ 253.6 Revision in timing and/or estimates 13.5 249.3 3.8 136.8 9.5 118.4 Settlements (38.7) (18.4) (10.6) (2.2) (24.4) (7.5) Accretion 43.4 36.9 23.5 19.7 17.0 14.4 Ending balance $ 960.1 $ 941.9 $ 443.9 $ 427.2 $ 381.0 $ 378.9 Less: current portion (19.5) (40.2) (7.3) (11.2) (11.0) (21.2) Total noncurrent asset $ 940.6 $ 901.7 $ 436.6 $ 416.0 $ 370.0 $ 357.7

PROPERTY, PLANT AND EQUIPMENT

PROPERTY, PLANT AND EQUIPMENT	12 Months Ended
	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
PROPERTY, PLANT AND EQUIPMENT	PROPERTY, PLANT AND EQUIPMENT The following tables summarize the property, plant and equipment of Evergy, Evergy Kansas Central and Evergy Metro. December 31, 2021 Evergy Evergy Kansas Central Evergy Metro (millions) Electric plant in service $ 30,289.9 $ 14,686.3 $ 11,656.9 Electric plant acquisition adjustment 724.3 724.3 — Accumulated depreciation (11,515.5) (5,590.8) (4,733.7) Plant in service 19,498.7 9,819.8 6,923.2 Construction work in progress 1,350.6 652.2 475.3 Nuclear fuel, net 152.5 76.1 76.4 Plant to be retired, net (a) 0.8 0.8 — Net property, plant and equipment $ 21,002.6 $ 10,548.9 $ 7,474.9 December 31, 2020 Evergy Evergy Kansas Central Evergy Metro (millions) Electric plant in service $ 28,914.8 $ 14,095.1 $ 11,161.8 Electric plant acquisition adjustment 724.3 724.3 — Accumulated depreciation (10,998.4) (5,293.5) (4,532.7) Plant in service 18,640.7 9,525.9 6,629.1 Construction work in progress 1,153.5 589.1 433.9 Nuclear fuel, net 155.9 77.7 78.2 Plant to be retired, net (a) 0.9 0.9 — Net property, plant and equipment $ 19,951.0 $ 10,193.6 $ 7,141.2 (a) As of December 31, 2021 and 2020, represents the planned retirement of Evergy Kansas Central analog meters prior to the end of their remaining useful lives. The following table summarizes the property, plant and equipment of VIEs for Evergy and Evergy Kansas Central. December 31 2021 2020 (millions) Electric plant of VIEs $ 392.1 $ 392.1 Accumulated depreciation of VIEs (244.3) (237.2) Net property, plant and equipment of VIEs $ 147.8 $ 154.9 Depreciation Expense The Evergy Companies' depreciation expense is detailed in the following table. 2021 2020 2019 (millions) Evergy (a) $ 813.6 $ 804.7 $ 786.3 Evergy Kansas Central (a) 450.3 435.1 425.8 Evergy Metro 255.9 269.5 262.7 (a) Approximately $7.1 million of depreciation expense in each of 2021, 2020 and 2019 was attributable to property, plant and equipment of VIEs.

JOINTLY-OWNED ELECTRIC UTILITY

JOINTLY-OWNED ELECTRIC UTILITY PLANTS	12 Months Ended
	Dec. 31, 2021
Jointly Owned Electric Utility Plants [Abstract]
JOINTLY-OWNED ELECTRIC UTILITY PLANTS	JOINTLY-OWNED ELECTRIC UTILITY PLANTS Evergy's, Evergy Kansas Central's and Evergy Metro's share of jointly-owned electric utility plants at December 31, 2021, are detailed in the following tables. Evergy Wolf Creek Unit La Cygne Units (a) Iatan No. 1 Unit Iatan No. 2 Unit Iatan Common Jeffrey Energy Center State Line (millions, except MW amounts) Evergy's share 94% 100% 88% 73% 79% 100% 40% Electric plant in $ 4,078.7 $ 2,219.1 $ 765.7 $ 1,405.9 $ 503.6 $ 2,521.1 $ 115.0 Accumulated depreciation 2,040.2 816.0 251.9 480.3 122.2 1,036.7 85.2 Nuclear fuel, net 152.5 — — — — — — Construction work in progress 187.4 52.6 4.4 8.1 7.4 48.7 25.5 2022 accredited 1,108 1,426 618 640 n/a 2,191 200 (a) The VIE consolidated by Evergy and Evergy Kansas Central holds its 50% leasehold interest in La Cygne Unit 2. This 50% leasehold interest in La Cygne Unit 2 is reflected in the information provided above. See Note 18 for additional information. Evergy Kansas Central Wolf Creek Unit La Cygne Units (a) Jeffrey Energy Center State (millions, except MW amounts) Evergy Kansas Central's share 47% 50% 92% 40% Electric plant in service $ 2,019.8 $ 1,047.4 $ 2,307.6 $ 115.0 Accumulated depreciation 992.2 475.2 944.5 85.2 Nuclear fuel, net 76.1 — — — Construction work in progress 83.6 29.0 44.9 25.5 2022 accredited capacity-MWs 554 713 2,016 200 (a) The VIE consolidated by Evergy and Evergy Kansas Central holds its 50% leasehold interest in La Cygne Unit 2. This 50% leasehold interest in La Cygne Unit 2 is reflected in the information provided above. See Note 18 for additional information. Evergy Metro Wolf Creek Unit La Cygne Units Iatan No. 1 Unit Iatan No. 2 Unit Iatan Common (millions, except MW amounts) Evergy Metro's share 47% 50% 70% 55% 61% Electric plant in service $ 2,058.9 $ 1,171.7 $ 594.8 $ 1,066.4 $ 399.6 Accumulated depreciation 1,048.0 340.8 205.3 412.5 103.3 Nuclear fuel, net 76.4 — — — — Construction work in progress 103.8 23.6 3.6 6.1 5.5 2022 accredited capacity-MWs 554 713 492 482 NA Each owner must fund its own portion of the plant's operating expenses and capital expenditures. The Evergy Companies' share of direct expenses are included in the appropriate operating expense classifications in Evergy's, Evergy Kansas Central's and Evergy Metro's consolidated financial statements.

PENSION PLANS AND POST-RETIREME

PENSION PLANS AND POST-RETIREMENT BENEFITS	12 Months Ended
	Dec. 31, 2021
Retirement Benefits [Abstract]
PENSION PLANS AND POST-RETIREMENT BENEFITS	PENSION PLANS AND POST-RETIREMENT BENEFITS Evergy and certain of its subsidiaries maintain, and Evergy Kansas Central and Evergy Metro participate in, qualified non-contributory defined benefit pension plans covering the majority of Evergy Kansas Central's and Evergy Metro's employees as well as certain non-qualified plans covering certain active and retired officers. Evergy is also responsible for its indirect 94% ownership share of Wolf Creek's defined benefit plans, consisting of Evergy Kansas South's and Evergy Metro's respective 47% ownership shares. For the majority of employees, pension benefits under these plans reflect the employees' compensation, years of service and age at retirement. However, for the plan covering Evergy Kansas Central's employees, the benefits for non-union employees hired between 2002 and the second quarter of 2018 and union employees hired beginning in 2012 are derived from a cash balance account formula. The plan was closed to future non-union employees in 2018. For the plans covering Evergy Metro's employees, the benefits for union employees hired beginning in 2014 are derived from a cash balance account formula and the plans were closed to future non-union employees in 2014. Evergy and its subsidiaries also provide certain post-retirement health care and life insurance benefits for substantially all retired employees of Evergy Kansas Central and Evergy Metro and their respective shares of Wolf Creek's post-retirement benefit plans. The Evergy Companies record pension and post-retirement expense in accordance with rate orders from the KCC and MPSC that allow the difference between pension and post-retirement costs under GAAP and costs for ratemaking to be recognized as a regulatory asset or liability. This difference between financial and regulatory accounting methods is due to timing and will be eliminated over the life of the plans. For 2021, Evergy, Evergy Kansas Central and Evergy Metro recorded pension settlement charges of $34.3 million, $25.6 million and $13.7 million, respectively. For 2020, Evergy and Evergy Metro recorded pension settlement charges of $11.2 million and $14.3 million, respectively. For 2019, Evergy and Evergy Metro recorded pension settlement charges of $15.6 million and $23.0 million, respectively. These settlement charges were the result of accelerated pension distributions as a result of employee retirements and annuity purchases for certain plan participants in 2021. Evergy, Evergy Kansas Central and Evergy Metro deferred substantially all of the charges to a regulatory asset and expect to recover these amounts over future periods pursuant to regulatory agreements. The following pension benefits tables provide information relating to the funded status of all defined benefit pension plans on an aggregate basis as well as the components of net periodic benefit costs. For financial reporting purposes, the market value of plan assets is the fair value. Net periodic benefit costs reflect total plan benefit costs prior to the effects of capitalization and sharing with joint owners of power plants. Pension Benefits Post-Retirement Benefits Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Change in projected benefit obligation (PBO) (millions) PBO at January 1, 2021 $ 2,901.1 $ 1,429.6 $ 1,446.5 $ 280.4 $ 146.8 $ 133.6 Service cost 82.6 29.1 53.5 3.3 1.7 1.6 Interest cost 84.2 41.0 42.5 7.8 4.0 3.8 Contribution by participants — — — 9.0 1.4 7.6 Actuarial gain (119.0) (50.0) (68.3) (17.2) (9.4) (7.8) Benefits paid (93.5) (54.8) (37.5) (24.9) (10.6) (14.3) Settlements (284.0) (126.2) (157.8) — — — Other (9.7) (4.3) (5.4) — — — PBO at December 31, 2021 $ 2,561.7 $ 1,264.4 $ 1,273.5 $ 258.4 $ 133.9 $ 124.5 Change in plan assets Fair value of plan assets at January 1, 2021 $ 1,799.1 $ 887.0 $ 912.1 $ 248.3 $ 125.8 $ 122.5 Actual return on plan assets 145.5 83.4 62.1 5.2 6.5 (1.3) Contributions by employer and participants 148.7 46.5 102.2 11.8 1.7 10.1 Benefits paid (89.4) (52.3) (37.1) (23.0) (10.0) (13.0) Settlements (279.5) (124.6) (154.9) — — — Other (9.7) (4.3) (5.4) — — — Fair value of plan assets at December 31, 2021 $ 1,714.7 $ 835.7 $ 879.0 $ 242.3 $ 124.0 $ 118.3 Funded status at December 31, 2021 $ (847.0) $ (428.7) $ (394.5) $ (16.1) $ (9.9) $ (6.2) Pension Benefits Post-Retirement Benefits Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Amounts recognized in the consolidated balance sheets (millions) Non-current asset $ — $ — $ — $ 21.5 $ — $ 21.5 Current pension and other post-retirement liability (4.4) (2.4) (0.7) (1.1) (0.6) (0.6) Noncurrent pension liability and other post-retirement liability (842.6) (426.3) (393.8) (36.5) (9.3) (27.1) Net amount recognized before regulatory treatment (847.0) (428.7) (394.5) (16.1) (9.9) (6.2) Accumulated OCI or regulatory asset/liability 317.2 263.6 84.6 (11.4) (9.6) (10.5) Net amount recognized at December 31, 2021 $ (529.8) $ (165.1) $ (309.9) $ (27.5) $ (19.5) $ (16.7) Amounts in accumulated OCI or regulatory asset/liability not yet recognized as a component of net periodic benefit cost: Actuarial (gain) loss $ 302.4 $ 246.6 $ 86.4 $ (12.6) $ (10.5) $ (3.8) Prior service cost 14.8 17.0 (1.8) 1.2 0.9 (6.7) Net amount recognized at December 31, 2021 $ 317.2 $ 263.6 $ 84.6 $ (11.4) $ (9.6) $ (10.5) Pension Benefits Post-Retirement Benefits Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Change in projected benefit obligation (PBO) (millions) PBO at January 1, 2020 $ 2,718.2 $ 1,323.4 $ 1,371.4 $ 264.3 $ 138.7 $ 125.6 Service cost 78.9 27.1 51.8 2.7 1.1 1.6 Interest cost 96.8 47.0 49.1 9.2 4.8 4.4 Contribution by participants — — — 9.3 1.8 7.5 Plan amendments 4.2 8.1 (3.9) 1.0 0.5 0.5 Actuarial loss 273.9 127.0 144.8 19.6 11.0 8.6 Benefits paid (202.5) (102.3) (99.0) (25.7) (11.1) (14.6) Settlements (62.9) — (62.9) — — — Other (5.5) (0.7) (4.8) — — — PBO at December 31, 2020 $ 2,901.1 $ 1,429.6 $ 1,446.5 $ 280.4 $ 146.8 $ 133.6 Change in plan assets Fair value of plan assets at January 1, 2020 $ 1,732.8 $ 842.1 $ 890.7 $ 239.9 $ 120.5 $ 119.4 Actual return on plan assets 209.9 99.7 110.2 20.7 13.7 7.0 Contributions by employer and participants 123.4 45.8 77.6 11.7 2.1 9.6 Benefits paid (198.6) (99.9) (98.7) (24.0) (10.5) (13.5) Settlements (62.9) — (62.9) — — — Other (5.5) (0.7) (4.8) — — — Fair value of plan assets at December 31, 2020 $ 1,799.1 $ 887.0 $ 912.1 $ 248.3 $ 125.8 $ 122.5 Funded status at December 31, 2020 $ (1,102.0) $ (542.6) $ (534.4) $ (32.1) $ (21.0) $ (11.1) Pension Benefits Post-Retirement Benefits Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Amounts recognized in the consolidated balance sheets (millions) Non-current asset $ — $ — $ — $ 21.3 $ — $ 21.3 Current pension and other post-retirement liability (4.4) (2.5) (0.8) (1.6) (0.8) (0.9) Noncurrent pension liability and other post- (1,097.6) (540.1) (533.6) (51.8) (20.2) (31.5) Net amount recognized before regulatory treatment (1,102.0) (542.6) (534.4) (32.1) (21.0) (11.1) Accumulated OCI or regulatory asset/liability 566.9 408.0 216.9 4.0 1.0 (7.7) Net amount recognized at December 31, 2020 $ (535.1) $ (134.6) $ (317.5) $ (28.1) $ (20.0) $ (18.8) Amounts in accumulated OCI or regulatory asset/liability not yet recognized as a component of net periodic benefit cost: Actuarial (gain) loss $ 551.8 $ 388.9 $ 218.6 $ 2.2 $ (0.3) $ — Prior service cost 15.1 19.1 (1.7) 1.8 1.3 (7.7) Net amount recognized at December 31, 2020 $ 566.9 $ 408.0 $ 216.9 $ 4.0 $ 1.0 $ (7.7) Actuarial gains for the Evergy Companies' pension benefit plans for 2021 were primarily driven by an increase in the discount rate used to measure the benefit obligation as a result of higher market interest rates. See the weighted average assumptions used to determine the benefit obligations in this Note 9 for further information. Actuarial losses for the Evergy Companies' pension benefit plans for 2020 were primarily driven by a decrease in the discount rate used to measure the benefit obligation of approximately 70 basis points as a result of lower market interest rates. As of December 31, 2021 and 2020, Evergy's pension benefits include non-qualified benefit obligations of $49.2 million and $52.1 million, respectively, which are funded by trusts containing assets of $44.2 million and $46.3 million, respectively. As of December 31, 2021 and 2020, Evergy Kansas Central's pension benefits include non-qualified benefit obligations of $25.4 million and $27.0 million, respectively, which are funded by trusts containing assets of $31.7 million and $32.7 million, respectively. The assets in the aforementioned trusts are not included in the table above. See Note 13 for more information on these amounts. Pension Benefits Post-Retirement Benefits Year Ended December 31, 2021 Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Components of net periodic benefit costs (millions) Service cost $ 82.6 $ 29.1 $ 53.5 $ 3.3 $ 1.7 $ 1.6 Interest cost 84.2 41.0 42.5 7.8 4.0 3.8 Expected return on plan assets (103.5) (52.8) (55.7) (8.9) (6.3) (2.6) Prior service cost 2.0 2.1 — 0.5 0.5 (1.0) Recognized net actuarial (gain) loss 54.1 36.0 43.8 1.4 0.6 (0.1) Settlement and special termination benefits 34.3 25.6 13.7 — — — Net periodic benefit costs before regulatory adjustment and intercompany allocations 153.7 81.0 97.8 4.1 0.5 1.7 Regulatory adjustment 17.3 (13.1) 4.2 (4.8) (3.3) 0.4 Intercompany allocations n/a 3.2 (25.9) n/a — (0.4) Net periodic benefit costs (income) 171.0 71.1 76.1 (0.7) (2.8) 1.7 Other changes in plan assets and benefit obligations recognized in OCI or regulatory assets/liabilities Current year net gain (195.3) (106.3) (88.4) (13.6) (9.6) (3.9) Amortization of gain (loss) (52.4) (36.0) (43.9) (1.3) (0.5) 0.1 Amortization of prior service cost (2.0) (2.1) — (0.5) (0.5) 1.0 Total recognized in OCI or regulatory asset/liability (249.7) (144.4) (132.3) (15.4) (10.6) (2.8) Total recognized in net periodic benefit costs and OCI or regulatory asset/liability $ (78.7) $ (73.3) $ (56.2) $ (16.1) $ (13.4) $ (1.1) Pension Benefits Post-Retirement Benefits Year Ended December 31, 2020 Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Components of net periodic benefit costs (millions) Service cost $ 78.9 $ 27.1 $ 51.8 $ 2.7 $ 1.1 $ 1.6 Interest cost 96.8 47.0 49.1 9.2 4.8 4.4 Expected return on plan assets (105.6) (53.1) (54.7) (9.3) (6.6) (2.7) Prior service cost 1.8 1.6 0.8 0.5 0.5 — Recognized net actuarial loss 46.4 33.9 45.7 0.2 — (0.6) Settlement and special termination benefits 11.2 — 14.3 — — — Net periodic benefit costs before regulatory adjustment and intercompany allocations 129.5 56.5 107.0 3.3 (0.2) 2.7 Regulatory adjustment 29.6 5.9 (11.6) (4.0) (3.0) (0.2) Intercompany allocations n/a (0.2) (22.6) n/a 0.1 (0.3) Net periodic benefit costs (income) 159.1 62.2 72.8 (0.7) (3.1) 2.2 Other changes in plan assets and benefit obligations recognized in OCI or regulatory assets/liabilities Current year net loss 169.7 80.4 89.3 8.2 3.9 4.3 Amortization of gain (loss) (59.2) (33.8) (60.0) (0.2) — 0.6 Prior service cost 4.1 8.1 (3.9) 0.9 0.5 0.4 Amortization of prior service cost (1.8) (1.6) (0.8) (0.5) (0.5) — Total recognized in OCI or regulatory asset/liability 112.8 53.1 24.6 8.4 3.9 5.3 Total recognized in net periodic benefit costs and OCI or regulatory asset/liability $ 271.9 $ 115.3 $ 97.4 $ 7.7 $ 0.8 $ 7.5 Pension Benefits Post-Retirement Benefits Year Ended December 31, 2019 Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Components of net periodic benefit costs (millions) Service cost $ 79.1 $ 29.0 $ 50.1 $ 2.5 $ 1.1 $ 1.4 Interest cost 108.0 53.7 53.3 10.5 5.6 4.9 Expected return on plan assets (106.3) (54.8) (48.9) (10.0) (6.7) (3.3) Prior service cost 1.9 1.7 0.9 0.5 0.5 — Recognized net actuarial (gain) loss 33.0 25.5 49.8 (1.2) (0.6) (1.4) Settlement and special termination benefits 15.6 — 23.0 — — — Net periodic benefit costs before regulatory adjustment and intercompany allocations 131.3 55.1 128.2 2.3 (0.1) 1.6 Regulatory adjustment 37.4 3.0 (19.2) (3.4) (3.0) 0.4 Intercompany allocations n/a — (34.4) n/a — (0.4) Net periodic benefit costs (income) 168.7 58.1 74.6 (1.1) (3.1) 1.6 Other changes in plan assets and benefit obligations recognized in OCI or regulatory assets/liabilities Current year net (gain) loss 84.7 44.6 35.9 0.9 (3.8) 4.7 Amortization of gain (loss) (48.6) (25.5) (72.8) 1.2 0.6 1.4 Amortization of prior service cost (1.9) (1.7) (0.9) (0.5) (0.5) — Total recognized in OCI or regulatory asset/liability 34.2 17.4 (37.8) 1.6 (3.7) 6.1 Total recognized in net periodic benefit costs and OCI or regulatory asset/liability $ 202.9 $ 75.5 $ 36.8 $ 0.5 $ (6.8) $ 7.7 For financial reporting purposes, the estimated prior service cost and net actuarial (gain) loss for the defined benefit plans are amortized from accumulated other comprehensive income (OCI) or a regulatory asset into net periodic benefit cost. The Evergy Companies amortize prior service cost on a straight-line basis over the average future service of the active employees (plan participants) benefiting under the plan. Evergy and Evergy Kansas Central amortize the net actuarial (gain) loss on a straight-line basis over the average future service of active plan participants benefiting under the plan without application of an amortization corridor. Evergy Metro amortizes the net actuarial (gain) loss on a rolling five-year average basis. Pension and other post-retirement benefit plans with the PBO, accumulated benefit obligation (ABO) or accumulated other post-retirement benefit obligation (APBO) in excess of the fair value of plan assets at year-end are detailed in the following tables. December 31, 2021 Evergy Evergy Kansas Central Evergy Metro (millions) ABO for all defined benefit pension plans $ 2,229.1 $ 1,124.2 $ 1,081.1 Pension plans with the PBO in excess of plan assets Projected benefit obligation $ 2,561.7 $ 1,264.4 $ 1,273.5 Fair value of plan assets 1,714.7 835.7 879.0 Pension plans with the ABO in excess of plan assets Accumulated benefit obligation $ 2,229.1 $ 1,124.2 $ 1,081.1 Fair value of plan assets 1,714.7 835.7 879.0 Other post-retirement benefit plans with the APBO in excess of plan assets Accumulated other post-retirement benefit obligation $ 258.4 $ 133.9 $ 124.5 Fair value of plan assets 242.3 124.0 118.3 December 31, 2020 Evergy Evergy Kansas Central Evergy Metro (millions) ABO for all defined benefit pension plans $ 2,534.1 $ 1,281.6 $ 1,227.4 Pension plans with the PBO in excess of plan assets Projected benefit obligation $ 2,901.1 $ 1,429.6 $ 1,446.5 Fair value of plan assets 1,799.1 887.0 912.1 Pension plans with the ABO in excess of plan assets Accumulated benefit obligation $ 2,534.1 $ 1,281.6 $ 1,227.4 Fair value of plan assets 1,799.1 887.0 912.1 Other post-retirement benefit plans with the APBO in excess of plan assets Accumulated other post-retirement benefit obligation $ 280.4 $ 146.8 $ 133.6 Fair value of plan assets 248.3 125.8 122.5 The expected long-term rate of return on plan assets represents the Evergy Companies' estimate of the long-term return on plan assets and is based on historical and projected rates of return for current and planned asset classes in the plans' investment portfolios. Assumed projected rates of return for each asset class were selected after analyzing historical experience and future expectations of the returns of various asset classes. Based on the target asset allocation for each asset class, the overall expected rate of return for the portfolios was developed and adjusted for the effect of projected benefits paid from plan assets and future plan contributions. The following tables provide the weighted-average assumptions used to determine benefit obligations and net costs for the Evergy Companies' pension and post-retirement benefit plans. Weighted-average assumptions used to determine the benefit obligation at December 31, 2021 Pension Benefits Post-Retirement Benefits Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Discount rate 3.10 % 3.10 % 3.11 % 3.12 % 3.11 % 3.13 % Rate of compensation increase 3.75 % 3.77 % 3.71 % 3.75 % n/a 3.75 % Interest crediting rate for cash balance plans 4.13 % 4.00 % 4.45 % n/a n/a n/a Weighted-average assumptions used to determine the benefit obligation at December 31, 2020 Pension Benefits Post-Retirement Benefits Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Discount rate 2.95 % 2.93 % 2.97 % 2.84 % 2.80 % 2.88 % Rate of compensation increase 3.71 % 3.76 % 3.71 % 3.75 % n/a 3.75 % Interest crediting rate for cash balance plans 4.12 % 4.00 % 4.46 % n/a n/a n/a Weighted-average assumptions used to determine net costs for the year ended December 31, 2021 Pension Benefits Post-Retirement Benefits Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Discount rate 2.95 % 2.93 % 2.97 % 2.84 % 2.80 % 2.88 % Expected long-term return on plan assets 6.63 % 6.70 % 6.57 % 3.93 % 5.55 % 2.27 % Rate of compensation increase 3.71 % 3.78 % 3.71 % 3.75 % n/a 3.75 % Interest crediting rate for cash balance plans 4.12 % 4.00 % 4.46 % n/a n/a n/a Weighted-average assumptions used to determine net costs for the year ended December 31, 2020 Pension Benefits Post-Retirement Benefits Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Discount rate 3.62 % 3.61 % 3.64 % 3.56 % 3.54 % 3.58 % Expected long-term return on plan assets 6.63 % 6.70 % 6.56 % 4.19 % 6.00 % 2.37 % Rate of compensation increase 3.74 % 3.75 % 3.71 % 3.75 % n/a 3.75 % Interest crediting rate for cash balance plans 4.32 % 4.21 % 4.50 % n/a n/a n/a Evergy expects to contribute $92.9 million to the pension plans in 2022 to meet Employee Retirement Income Security Act of 1974, as amended (ERISA) funding requirements and regulatory orders, of which $30.6 million is expected to be paid by Evergy Kansas Central and $62.3 million is expected to be paid by Evergy Metro. The Evergy Companies' funding policy is to contribute amounts sufficient to meet the ERISA funding requirements and MPSC and KCC rate orders plus additional amounts as considered appropriate; therefore, actual contributions may differ from expected contributions. Also in 2022, Evergy expects to contribute $2.2 million to the post-retirement benefit plans, of which $0.5 million is expected to be paid by Evergy Kansas Central and $1.7 million is expected to be paid by Evergy Metro. The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid through 2031. Pension Benefits Post-Retirement Benefits Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro (millions) 2022 $ 159.5 $ 80.8 $ 77.5 $ 16.1 $ 9.2 $ 6.9 2023 160.4 79.6 79.5 15.6 9.0 6.7 2024 163.8 80.6 81.7 15.1 8.5 6.6 2025 168.1 81.3 85.3 14.7 8.2 6.5 2026 173.5 83.2 88.8 14.3 8.0 6.4 2027-2031 862.9 399.5 455.7 68.5 37.2 31.2 As of December 31, 2021, Evergy Kansas Central and Evergy Metro maintained a master trust for their non-union and Evergy Kansas Central's union pension benefits and a separate trust for Evergy Metro's union pension benefits. Evergy Kansas Central and Evergy Metro maintained separate trusts for their post-retirement benefits as of December 31,2021. These plans are managed in accordance with prudent investor guidelines contained in the ERISA requirements. The primary objective of Evergy Kansas Central's and Evergy Metro's pension plans is to provide a source of retirement income for its participants and beneficiaries, and the primary financial objectives of the plans are to minimize funding deficiencies and maintain the plans' ability to pay all benefit and expense obligations when due. The primary objective of Evergy Kansas Central's and Evergy Metro's post-retirement benefit plans is to preserve capital, maintain sufficient liquidity and earn a consistent rate of return. The investment strategies of both the Evergy Kansas Central and Evergy Metro pension and post-retirement plans support the above objectives of the plans. The portfolios are invested, and periodically rebalanced, to achieve the targeted allocations detailed below. The following table provides the target asset allocations by asset class for the Evergy Kansas Central and Evergy Metro pension and other post-retirement plan assets. Pension Benefits Post-Retirement Benefits Evergy Kansas Central Evergy Metro Evergy Kansas Central Evergy Metro Domestic equities 26% 26% 26% 15% International equities 20% 19% 18% 8% Bonds 39% 37% 51% 68% Mortgage & asset backed securities —% —% —% 6% Real estate investments 4% 7% —% —% Other investments 11% 11% 5% 3% Fair Value Measurements Evergy classifies recurring and non-recurring fair value measurements based on the fair value hierarchy as discussed in Note 13. The following are descriptions of the valuation methods of the primary fair value measurements disclosed below. Domestic equities - consist of individually held domestic equity securities and domestic equity mutual funds. Securities and funds, which are publicly quoted, are valued based on quoted prices in active markets and are categorized as Level 1. Funds that are valued by fund administrators using the net asset value (NAV) per fund share, derived from the quoted prices in active markets of the underlying securities are not classified within the fair value hierarchy. International equities - consist of individually held international equity securities and international equity mutual funds. Securities and funds, which are publicly quoted, are valued based on quoted prices in active markets and are categorized as Level 1. Funds that are valued by fund administrators using the NAV per fund share, derived from the quoted prices in active markets of the underlying securities are not classified within the fair value hierarchy. Bond funds - consist of funds maintained by investment companies that invest in various types of fixed income securities consistent with the funds' stated objectives. Securities and funds, which are publicly quoted, are valued based on quoted prices in active markets and are categorized as Level 1. Funds that are valued by fund administrators using the NAV per fund share, derived from the quoted prices in active markets of the underlying securities, are not classified within the fair value hierarchy. Corporate bonds - consists of individually held, primarily domestic, corporate bonds that are traded in less than active markets or priced with models using highly observable inputs that are categorized as Level 2. U.S. Treasury and agency bonds - consists of individually held U.S. Treasury securities and U.S. agency bonds. U.S. Treasury securities, which are publicly quoted, are valued based on quoted prices in active markets and are categorized as a Level 1. U.S. agency bonds, which are publicly quoted, are traded in less than active markets or priced with models using highly observable inputs and are categorized as Level 2. Mortgage and asset backed securities - consists of individually held securities that are traded in less than active markets or valued with models using highly observable inputs that are categorized as Level 2. Real estate investments - consists of traded real estate investment trusts valued at the closing price reported on the major market on which the trusts are traded and are categorized as Level 1 and institutional trust funds valued at NAV per fund share and are not categorized in the fair value hierarchy. Combination debt/equity/other fund - consists of a fund that invests in various types of debt, equity and other asset classes consistent with the fund's stated objectives. The fund, which is publicly quoted, is valued based on quoted prices in active markets and is categorized as Level 1. Alternative investments - consists of investments in institutional trust and hedge funds that are valued by fund administrators using the NAV per fund share, derived from the underlying investments of the fund, and are not classified within the fair value hierarchy. Short-term investments - consists of fund investments in high-quality, short-term, U.S. dollar-denominated instruments with an average maturity of 60 days that are valued at NAV per fund share and are not categorized in the fair value hierarchy. Cash and cash equivalents - consists of investments with original maturities of three months or less when purchased that are traded in active markets and are categorized as Level 1. The fair values of the Evergy Companies' pension plan assets at December 31, 2021 and 2020, by asset category are in the following tables. Fair Value Measurements Using December 31 Level 1 Level 2 Level 3 Assets measured at NAV (millions) Evergy Kansas Central Pension Plans Domestic equities $ 209.9 $ 177.3 $ — $ — $ 32.6 International equities 167.4 167.4 — — — Bond funds 330.4 330.4 — — — Real estate investments 28.1 — — — 28.1 Combination debt/equity/other fund 42.7 42.7 — — — Alternative investment funds 44.1 — — — 44.1 Short-term investments 13.1 — — — 13.1 Total $ 835.7 $ 717.8 $ — $ — $ 117.9 Evergy Metro Pension Plans Domestic equities $ 203.0 $ 179.5 $ — $ — $ 23.5 International equities 193.1 193.1 — — — Bond funds 260.6 260.6 — — — Corporate bonds 27.1 — 27.1 — — U.S. Treasury and agency bonds 14.5 4.7 9.8 — — Mortgage and asset backed securities 4.3 — 4.3 — — Real estate investments 55.9 — — — 55.9 Combination debt/equity/other fund 46.2 46.2 — — — Alternative investment funds 47.5 — — — 47.5 Cash and cash equivalents 14.1 14.1 — — — Short-term investments 9.5 — — — 9.5 Other 3.2 — 3.2 — — Total $ 879.0 $ 698.2 $ 44.4 $ — $ 136.4 Fair Value Measurements Using December 31 Level 1 Level 2 Level 3 Assets measured at NAV (millions) Evergy Kansas Central Pension Plans Domestic equities $ 248.5 $ 151.3 $ — $ — $ 97.2 International equities 171.2 103.8 — — 67.4 Bond funds 281.2 230.7 — — 50.5 Real estate investments 46.7 — — — 46.7 Combination debt/equity/other fund 30.4 30.4 — — — Alternative investment funds 83.6 — — — 83.6 Short-term investments 25.4 — — — 25.4 Total $ 887.0 $ 516.2 $ — $ — $ 370.8 Evergy Metro Pension Plans Domestic equities $ 247.4 $ 191.9 $ — $ — $ 55.5 International equities 220.8 153.4 — — 67.4 Bond funds 78.1 21.1 — — 57.0 Corporate bonds 133.6 — 133.6 — — U.S. Treasury and agency bonds 73.8 61.5 12.3 — — Mortgage and asset backed securities 5.0 — 5.0 — — Real estate investments 40.2 1.6 — — 38.6 Combination debt/equity/other fund 15.6 15.6 — — — Alternative investment funds 39.7 — — — 39.7 Cash and cash equivalents 57.3 57.3 — — — Short-term investments 1.4 — — — 1.4 Other (0.8) — (0.8) — — Total $ 912.1 $ 502.4 $ 150.1 $ — $ 259.6 The fair values of the Evergy Companies' post-retirement plan assets at December 31, 2021 and 2020, by asset category are in the following tables. Fair Value Measurements Using December 31 Level 1 Level 2 Level 3 Assets measured at NAV (millions) Evergy Kansas Central Post-Retirement Benefit Plans Domestic equities $ 32.5 $ 32.5 $ — $ — $ — International equities 22.1 22.1 — — — Bond funds 62.3 62.3 — — — Combination debt/equity/other fund 6.1 6.1 — — — Short-term investments 1.0 — — — 1.0 Total $ 124.0 $ 123.0 $ — $ — $ 1.0 Evergy Metro Post-Retirement Benefit Plans Domestic equities $ 20.0 $ 20.0 $ — $ — $ — International equities 12.3 12.3 — — — Bond funds 50.2 50.2 — — — Corporate bonds 18.1 — 18.1 — — U.S. Treasury and agency bonds 12.1 6.1 6.0 — — Mortgage and asset backed securities 0.8 — 0.8 — — Combination debt/equity/other fund 3.9 3.9 — — — Cash and cash equivalents 0.5 0.5 — — — Short-term investments 0.1 — — — 0.1 Other 0.3 — 0.3 — — Total $ 118.3 $ 93.0 $ 25.2 $ — $ 0.1 Fair Value Measurements Using December 31 Level 1 Level 2 Level 3 Assets measured at NAV (millions) Evergy Kansas Central Post-Retirement Benefit Plans Domestic equities $ 41.9 $ — $ — $ — $ 41.9 International equities 27.7 — — — 27.7 Bond funds 55.5 — — — 55.5 Cash and cash equivalents 0.7 0.7 — — — Total $ 125.8 $ 0.7 $ — $ — $ 125.1 Evergy Metro Post-Retirement Benefit Plans Domestic equities $ 4.6 $ 4.6 $ — $ — $ — International equities 1.2 1.2 — — — Bond funds 79.0 0.2 — — 78.8 Corporate bonds 17.9 — 17.9 — — U.S. Treasury and agency bonds 13.6 5.7 7.9 — — Mortgage and asset backed securities 0.5 — 0.5 — — Cash and cash equivalents 5.4 5.4 — — — Other 0.3 — 0.3 — — Total $ 122.5 $ 17.1 $ 26.6 $ — $ 78.8 Assumed health care cost trend rates have a significant effect on the amounts reported for the health care plans. The cost trend assumptions are detailed in the following tables. Assumed annual health care cost growth rates as of December 31, 2021 Evergy Evergy Kansas Central Evergy Metro Health care cost trend rate assumed for next year 6.0 % 6.0 % 6.0 % Rate to which the cost trend is assumed to decline (the ultimate trend rate) 4.5 % 4.5 % 4.5 % Year that rate reaches ultimate trend 2030 2030 2030 Assumed annual health care cost growth rates as of December 31, 2020 Evergy Evergy Kansas Central Evergy Metro Health care cost trend rate assumed for next year 6.0 % 6.0 % 6.0 % Rate to which the cost trend is assumed to decline (the ultimate trend rate) 4.5 % 4.5 % 4.5 % Year that rate reaches ultimate trend 2027 2027 2027 Employee Savings Plans Evergy has defined contribution savings plans (401(k)) that cover substantially all employees. Evergy matches employee contributions, subject to limits. The annual costs of the plans are detailed in the following table. 2021 2020 2019 (millions) Evergy $ 25.6 $ 17.4 $ 17.6 Evergy Kansas Central 11.7 9.6 9.6 Evergy Metro 13.9 7.8 8.0

EQUITY COMPENSATION

EQUITY COMPENSATION	12 Months Ended
	Dec. 31, 2021
Share-based Payment Arrangement [Abstract]
EQUITY COMPENSATION	EQUITY COMPENSATION Evergy's Long-Term Incentive Plan is an equity compensation plan approved by Evergy shareholders. The Long-Term Incentive Plan permits the grant of restricted stock, restricted stock units, bonus shares, stock options, stock appreciation rights, limited stock appreciation rights, director shares, director deferred share units and performance shares to directors, officers and other employees of Evergy. Common stock shares delivered by Evergy under the Long-Term Incentive Plan may be authorized but unissued, held in the treasury or purchased on the open market (including private purchases) in accordance with applicable securities laws. Evergy has a policy of delivering newly issued shares and does not expect to repurchase common shares during 2022 to satisfy equity compensation payments and director deferred share unit conversion. Forfeiture rates are based on historical forfeitures and future expectations and are reevaluated annually. The following table summarizes the Evergy Companies' equity compensation expense and the associated income tax benefit. 2021 2020 2019 Evergy (millions) Equity compensation expense $ 15.6 $ 15.5 $ 15.5 Income tax (expense) benefit (0.1) 2.2 3.0 Evergy Kansas Central Equity compensation expense 6.9 7.6 6.7 Income tax (expense) benefit (0.2) 1.6 1.9 Evergy Metro Equity compensation expense 5.1 5.7 5.7 Income tax (expense) benefit (0.6) 0.2 0.3 Restricted Share Units Evergy utilizes RSUs for new grants of stock-based compensation awards. RSU awards are grants that entitle the holder to receive shares of common stock as the awards vest. These RSU awards are defined as nonvested shares and do not include restrictions once the awards have vested. These RSUs either take the form of RSUs with performance measures that vest upon the achievement of specific performance goals or RSUs with only service requirements that vest solely upon the passage of time. RSUs with Performance Measures The payment of RSUs with performance measures is contingent upon achievement of specific performance goals over a stated period of time as approved by the Compensation and Leadership Development Committee of the Board. The numbers of RSUs with performances measures ultimately paid can vary from the numbers of RSUs with performance measures initially granted depending on Evergy's performance over the stated performance periods. Compensation expense for RSUs with performance measures is calculated by recognizing the portion of the fair value for each reporting period for which the requisite service has been rendered. Dividends are accrued over the vesting period and paid in cash based on the number of RSUs with performance measures ultimately paid. The fair value of RSUs with performance measures is estimated using the market value of Evergy's stock at the valuation date and a Monte Carlo simulation technique that incorporates assumptions for inputs of expected volatilities, dividend yield and risk-free rates. Expected volatility is based on daily stock price change during a historical period commensurate with the remaining term of the performance period of the grant. The risk-free rate is based upon the rate at the time of the evaluation for zero-coupon government bonds with a maturity consistent with the remaining performance period of the grant. The dividend yield is based on the most recent dividends paid and the actual closing stock price on the valuation date. For shares granted in 2021, inputs for expected volatility, dividend yield and the risk-free rate were 32%, 3.99% and 0.24%, respectively. RSU activity for awards with performance measures for 2021 is summarized in the following table. Nonvested Grant Date Beginning balance January 1, 2021 347,964 $ 61.57 Granted 270,277 57.21 Forfeited (104,526) 64.85 Ending balance December 31, 2021 513,715 58.79 * weighted-average At December 31, 2021, the remaining weighted-average contractual term related to RSU awards with performance measures was 1.4 years. The weighted-average grant-date fair value of RSUs granted with performance measures was $57.21, $87.98 and $37.87 in 2021, 2020 and 2019, respectively. At December 31, 2021, there was $15.3 million of unrecognized compensation expense related to unvested RSUs with performance measures. No RSUs with performance measures vested in 2021, 2020 and 2019. RSUs with Only Service Requirements Evergy measures the fair value of RSUs with only service requirements based on the fair market value of the underlying common stock as of the grant date. RSU awards with only service conditions recognize compensation expense by multiplying shares by the grant-date fair value related to the RSU and recognizing it on a straight-line basis over the requisite service period for the entire award. Dividends are accrued over the vesting period and are invested in additional RSU's subject to the same service conditions. RSU activity for awards with only service requirements for 2021 is summarized in the following table. Nonvested Grant Date Beginning balance January 1, 2021 160,742 $ 59.42 Granted 171,363 55.30 Vested (43,785) 54.61 Forfeited (35,274) 59.24 Ending balance December 31, 2021 253,046 57.18 * weighted-average At December 31, 2021, the remaining weighted-average contractual term related to RSU awards with only service requirements was 1.4 years. The weighted-average grant-date fair value of RSUs granted with only service requirements was $55.30, $68.92 and $54.47 in 2021, 2020 and 2019, respectively. At December 31, 2021, there was $7.0 million of unrecognized compensation expense related to unvested RSUs. The total fair value of RSUs with only service requirements that vested was $2.4 million, $6.5 million and $2.6 million in 2021, 2020 and 2019, respectively. In addition to RSU's, Evergy also had 36,012 shares and 108,010 shares of restricted stock and performance shares, respectively, that vested in 2021 related to Great Plains Energy equity compensation awards that converted to equivalent Evergy awards at the closing of the Great Plains Energy and Evergy Kansas Central merger in 2018.

SHORT-TERM BORROWINGS AND SHORT

SHORT-TERM BORROWINGS AND SHORT-TERM BANK LINES OF CREDIT	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
SHORT-TERM BORROWINGS AND SHORT-TERM BANK LINES OF CREDIT	SHORT-TERM BORROWINGS AND SHORT-TERM BANK LINES OF CREDITIn August 2021, Evergy amended its $2.5 billion master credit facility and extended the maturity until 2026. Evergy, Evergy Kansas Central, Evergy Metro and Evergy Missouri West have borrowing capacity under the master credit facility with specific sublimits for each borrower. These sublimits can be unilaterally adjusted by Evergy for each borrower provided the sublimits remain within minimum and maximum sublimits as specified in the facility. Evergy adjusted these sublimits in the first quarter of 2021 as further detailed in the table below. The applicable interest rates and commitment fees of the facility are subject to upward or downward adjustments, within certain limitations, if Evergy achieves, or fails to achieve, certain sustainability-linked targets based on two key performance indicator metrics: (i) Non-Emitting Generation Capacity and (ii) Diverse Supplier Spend (as defined in the facility). A default by any borrower under the facility or one of its significant subsidiaries on other indebtedness totaling more than $100.0 million constitutes a default by that borrower under the facility. Under the terms of this facility, each of Evergy, Evergy Kansas Central, Evergy Metro and Evergy Missouri West is required to maintain a total indebtedness to total capitalization ratio, as defined in the facility, of not greater than 0.65 to 1.00 at all times. As of December 31, 2021, Evergy, Evergy Kansas Central, Evergy Metro and Evergy Missouri West were in compliance with this covenant.

LONG-TERM DEBT

LONG-TERM DEBT	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
LONG-TERM DEBT	LONG-TERM DEBT The Evergy Companies' long-term debt is detailed in the following tables. December 31, 2021 Issuing Entity Year Due Evergy Evergy Kansas Central Evergy Metro Mortgage Bonds (millions) 3.25% Series Evergy Kansas Central, Inc. 2025 250.0 250.0 — 2.55% Series Evergy Kansas Central, Inc. 2026 350.0 350.0 — 3.10% Series Evergy Kansas Central, Inc. 2027 300.0 300.0 — 4.125% Series Evergy Kansas Central, Inc. 2042 550.0 550.0 — 4.10% Series Evergy Kansas Central, Inc. 2043 430.0 430.0 — 4.625% Series Evergy Kansas Central, Inc. 2043 250.0 250.0 — 4.25% Series Evergy Kansas Central, Inc. 2045 300.0 300.0 — 3.25% Series Evergy Kansas Central, Inc. 2049 300.0 300.0 3.45% Series Evergy Kansas Central, Inc. 2050 500.0 500.0 — 6.15% Series Evergy Kansas South, Inc. 2023 50.0 50.0 — 6.53% Series Evergy Kansas South, Inc. 2037 175.0 175.0 — 6.64% Series Evergy Kansas South, Inc. 2038 100.0 100.0 — 4.30% Series Evergy Kansas South, Inc. 2044 250.0 250.0 — 2.95% EIRR bonds Evergy Metro, Inc. 2023 79.5 — 79.5 4.125% Series Evergy Metro, Inc. 2049 400.0 — 400.0 2.25% Series Evergy Metro, Inc. 2030 400.0 — 400.0 Pollution Control Bonds 0.132% Series (b) Evergy Kansas Central, Inc. 2032 45.0 45.0 — 0.132% Series (b) Evergy Kansas Central, Inc. 2032 30.5 30.5 — 0.132% Series (b) Evergy Kansas South, Inc. 2027 21.9 21.9 — 2.50% Series Evergy Kansas South, Inc. 2031 50.0 50.0 — 0.132% Series (b) Evergy Kansas South, Inc. 2032 14.5 14.5 — 0.132% Series (b) Evergy Kansas South, Inc. 2032 10.0 10.0 — 0.167% Series 2007A and 2007B (b) Evergy Metro, Inc. 2035 146.5 — 146.5 2.75% Series 2008 Evergy Metro, Inc. 2038 23.4 — 23.4 Senior Notes 3.15% Series (g) Evergy Metro, Inc. 2023 300.0 — 300.0 3.65% Series (g) Evergy Metro, Inc. 2025 350.0 — 350.0 6.05% Series (5.78% rate) (a)(g) Evergy Metro, Inc. 2035 250.0 — 250.0 5.30% Series (g) Evergy Metro, Inc. 2041 400.0 — 400.0 4.20% Series (g) Evergy Metro, Inc. 2047 300.0 — 300.0 4.20% Series (g) Evergy Metro, Inc. 2048 300.0 — 300.0 3.49% Series A (h) Evergy Missouri West, Inc. 2025 36.0 — — 4.06% Series B (h) Evergy Missouri West, Inc. 2033 60.0 — — 4.74% Series C (h) Evergy Missouri West, Inc. 2043 150.0 — — 3.74% Series (h) Evergy Missouri West, Inc. 2022 100.0 — — 2.86% Series A (h) Evergy Missouri West, Inc. 2031 350.0 — — 3.01% Series B (h) Evergy Missouri West, Inc. 2033 75.0 — — 3.21% Series C (h) Evergy Missouri West, Inc. 2036 75.0 — — 5.292% Series Evergy, Inc. (f) 2022 287.5 — — 2.45% Series Evergy, Inc. 2024 800.0 — — 2.90% Series (3.77% rate) (a) Evergy, Inc. 2029 800.0 — — Medium Term Notes 7.33% Series (h) Evergy Missouri West, Inc. 2023 3.0 — — 7.17% Series (h) Evergy Missouri West, Inc. 2023 7.0 — — Fair value adjustment (e) 97.9 — — Current maturities (c) (389.3) — — Unamortized debt discount and debt issuance costs (80.5) (42.7) (24.4) Total excluding current maturities (d) $ 9,297.9 $ 3,934.2 $ 2,925.0 December 31, 2020 Issuing Entity Year Due Evergy Evergy Kansas Central Evergy Metro Mortgage Bonds (millions) 3.25% Series Evergy Kansas Central, Inc. 2025 $ 250.0 $ 250.0 $ — 2.55% Series Evergy Kansas Central, Inc. 2026 350.0 350.0 — 3.10% Series Evergy Kansas Central, Inc. 2027 300.0 300.0 — 4.125% Series Evergy Kansas Central, Inc. 2042 550.0 550.0 — 4.10% Series Evergy Kansas Central, Inc. 2043 430.0 430.0 — 4.625% Series Evergy Kansas Central, Inc. 2043 250.0 250.0 — 4.25% Series Evergy Kansas Central, Inc. 2045 300.0 300.0 — 3.25% Series Evergy Kansas Central, Inc. 2049 300.0 300.0 3.45% Series Evergy Kansas Central, Inc. 2050 500.0 500.0 — 6.15% Series Evergy Kansas South, Inc. 2023 50.0 50.0 — 6.53% Series Evergy Kansas South, Inc. 2037 175.0 175.0 — 6.64% Series Evergy Kansas South, Inc. 2038 100.0 100.0 — 4.30% Series Evergy Kansas South, Inc. 2044 250.0 250.0 — 2.95% EIRR bonds Evergy Metro, Inc. 2023 79.5 — 79.5 4.125% Series Evergy Metro, Inc. 2049 400.0 — 400.0 2.25% Series Evergy Metro, Inc. 2030 400.0 — 400.0 9.44% Series (h) Evergy Missouri West, Inc. 2021 1.1 — — Pollution Control Bonds 0.18% Series (b) Evergy Kansas Central, Inc. 2032 45.0 45.0 — 0.18% Series (b) Evergy Kansas Central, Inc. 2032 30.5 30.5 — 0.18% Series (b) Evergy Kansas South, Inc. 2027 21.9 21.9 — 2.50% Series Evergy Kansas South, Inc. 2031 50.0 50.0 — 0.18% Series (b) Evergy Kansas South, Inc. 2032 14.5 14.5 — 0.18% Series (b) Evergy Kansas South, Inc. 2032 10.0 10.0 — 0.20% Series 2007A and 2007B (b) Evergy Metro, Inc. 2035 146.5 — 146.5 2.75% Series 2008 Evergy Metro, Inc. 2038 23.4 — 23.4 Senior Notes 3.15% Series (g) Evergy Metro, Inc. 2023 300.0 — 300.0 3.65% Series (g) Evergy Metro, Inc. 2025 350.0 — 350.0 6.05% Series (5.78% rate) (a)(g) Evergy Metro, Inc. 2035 250.0 — 250.0 5.30% Series (g) Evergy Metro, Inc. 2041 400.0 — 400.0 4.20% Series (g) Evergy Metro, Inc. 2047 300.0 — 300.0 4.20% Series (g) Evergy Metro, Inc. 2048 300.0 — 300.0 8.27% Series (h) Evergy Missouri West, Inc. 2021 80.9 — — 3.49% Series A Evergy Missouri West, Inc. 2025 36.0 — — 4.06% Series B Evergy Missouri West, Inc. 2033 60.0 — — 4.74% Series C Evergy Missouri West, Inc. 2043 150.0 — — 3.74% Series Evergy Missouri West, Inc. 2022 100.0 — — 4.85% Series Evergy, Inc. (f) 2021 350.0 — — 5.292% Series Evergy, Inc. (f) 2022 287.5 — — 2.45% Series Evergy, Inc. 2024 800.0 — — 2.90% Series (3.77% rate) (a) Evergy, Inc. 2029 800.0 — — Medium Term Notes 7.33% Series (h) Evergy Missouri West, Inc. 2023 3.0 — — 7.17% Series (h) Evergy Missouri West, Inc. 2023 7.0 — — Fair value adjustment (e) 110.4 — — Current maturities (c) (436.4) — — Unamortized debt discount and debt issuance costs (84.9) (45.4) (26.4) Total excluding current maturities (d) $ 9,190.9 $ 3,931.5 $ 2,923.0 (a) Rate after amortizing gains/losses recognized in OCI on settlements of interest rate hedging instruments. (b) Variable rate. (c) Evergy's current maturities total as of December 31, 2021 and 2020, includes $1.8 million and $4.4 million, respectively, of fair value adjustments recorded in connection with purchase accounting for the Great Plains Energy and Evergy Kansas Central merger. (d) At December 31, 2021 and 2020, does not include $50.0 million and $21.9 million of secured Series 2005 Environmental Improvement Revenue Refunding (EIRR) bonds because the bonds were repurchased in September 2015 and are held by Evergy Metro. (e) Represents the fair value adjustments recorded at Evergy consolidated related to the long-term debt of Great Plains Energy, Evergy Metro and Evergy Missouri West in connection with purchase accounting for the Great Plains Energy and Evergy Kansas Central merger. This amount is not part of future principal payments and will amortize over the remaining life of the associated debt instruments. (f) Originally issued by Great Plains Energy but assumed by Evergy, Inc. as part of the Great Plains Energy and Evergy Kansas Central merger. (g) Effectively secured pursuant to the General Mortgage Indenture and Deed of Trust dated as of December 1, 1986, as supplemented (Evergy Metro Mortgage Indenture) through the issuance of collateral mortgage bonds to the trustee in 2019. (h) Unconditionally guaranteed by Evergy, Inc. Mortgage Bonds The Evergy Kansas Central and Evergy Kansas South mortgages each contain provisions restricting the amount of first mortgage bonds (FMBs) that could be issued by each entity. Evergy Kansas Central and Evergy Kansas South must be in compliance with such restrictions prior to the issuance of additional first mortgage bonds or other secured indebtedness. The amount of Evergy Kansas Central FMBs authorized by its Mortgage and Deed of Trust, dated July 1, 1939, as supplemented, is subject to certain limitations as described below. The amount of Evergy Kansas South FMBs authorized by the Evergy Kansas South Mortgage and Deed of Trust, dated April 1, 1940, as supplemented and amended, is limited to a maximum of $3.5 billion, unless amended further. FMBs are secured by utility assets. Amounts of additional FMBs that may be issued are subject to property, earnings and certain restrictive provisions, except in connection with certain refundings, of each mortgage. As of December 31, 2021, approximately $998.9 million and $2,828.6 million principal amounts of additional Evergy Kansas Central FMBs or Evergy Kansas South FMBs, respectively, could be issued under the most restrictive provisions of their mortgages. Evergy Metro has issued mortgage bonds under the Evergy Metro Mortgage Indenture, which creates a mortgage lien on substantially all Evergy Metro's utility plant. Additional Evergy Metro bonds may be issued on the basis of 75% of property additions or retired bonds. As of December 31, 2021, approximately $5,075.8 million principal amount of additional Evergy Metro mortgage bonds could be issued under the most restrictive provisions in the mortgage. Senior Notes Under the terms of the note purchase agreements for certain Evergy Missouri West senior notes, Evergy Missouri West is required to maintain a consolidated indebtedness to consolidated capitalization ratio, as defined in the agreements, not greater than 0.65 to 1.00. In addition, Evergy Missouri West's priority debt, as defined in the agreements, cannot exceed 15% of consolidated tangible net worth, as defined in the agreements. At December 31, 2021, Evergy Missouri West was in compliance with these covenants. In April 2021, Evergy Missouri West issued in a private placement $350.0 million of 2.86% Series A Senior Notes, maturing in 2031, $75.0 million of 3.01% Series B Senior Notes, maturing in 2033, and $75.0 million of 3.21% Series C Senior Notes, maturing in 2036, pursuant to a note purchase agreement. In connection with the issuance, Evergy entered into an agreement to provide an unconditional guaranty of the Series A, B and C Senior Notes, and as required by certain existing note purchase agreements, also agreed to provide unconditional guaranty of the following series of outstanding Evergy Missouri West unsecured senior notes: • $36.0 million of 3.49% Series A, maturing in 2025; • $60.0 million of 4.06% Series B, maturing in 2033; • $150.0 million of 4.74% Series C, maturing in 2043; and • $100.0 million of 3.74% Series, maturing in 2022. In April 2021, Evergy redeemed its $350.0 million of 4.85% Senior Notes, which had a maturity date of June 2021. In November 2021, Evergy Missouri West repaid its $80.9 million of 8.27% Senior Notes at maturity. Scheduled Maturities Evergy's, Evergy Kansas Central's and Evergy Metro's long-term debt maturities for the next five years are detailed in the following table. 2022 2023 2024 2025 2026 (millions) Evergy $ 387.5 $ 439.5 $ 800.0 $ 636.0 $ 350.0 Evergy Kansas Central — 50.0 — 250.0 350.0 Evergy Metro — 379.5 — 350.0 —

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS	FAIR VALUE MEASUREMENTS Values of Financial Instruments GAAP establishes a hierarchical framework for disclosing the transparency of the inputs utilized in measuring assets and liabilities at fair value. Management's assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the classification of assets and liabilities within the fair value hierarchy levels. In addition, the Evergy Companies measure certain investments that do not have a readily determinable fair value at net asset value (NAV), which are not included in the fair value hierarchy. Further explanation of these levels and NAV is summarized below. Level 1 – Quoted prices are available in active markets for identical assets or liabilities. The types of assets and liabilities included in Level 1 are highly liquid and actively traded instruments with quoted prices, such as equities listed on public exchanges. Level 2 – Pricing inputs are not quoted prices in active markets but are either directly or indirectly observable. The types of assets and liabilities included in Level 2 are certain marketable debt securities, financial instruments traded in less than active markets or other financial instruments priced with models using highly observable inputs. Level 3 – Significant inputs to pricing have little or no transparency. The types of assets and liabilities included in Level 3 are those with inputs requiring significant management judgment or estimation. NAV - Investments that do not have a readily determinable fair value are measured at NAV. These investments do not consider the observability of inputs and, therefore, they are not included within the fair value hierarchy. The Evergy Companies include in this category investments in private equity, real estate and alternative investment funds that do not have a readily determinable fair value. The underlying alternative investments include collateralized debt obligations, mezzanine debt and a variety of other investments. The Evergy Companies record cash and cash equivalents, accounts receivable and short-term borrowings on their consolidated balance sheets at cost, which approximates fair value due to the short-term nature of these instruments. Interest Rate Derivatives The Evergy Companies are exposed to market risks arising from changes in interest rates and may use derivative instruments to manage these risks. From time to time, risk management activities may include entering into interest rate swap agreements to protect against unfavorable interest rate changes relating to forecasted debt transactions. These interest rate swap agreements can be designated as cash flow hedges, in which case gains and losses on the interest rate swaps are deferred in other comprehensive income to be recognized as an adjustment to interest expense over the same period that the hedged interest payments affect earnings. The Evergy Companies classify all cash inflows and outflows for interest rate swap agreements accounted for as cash flow hedges of forecasted debt transactions as financing activities on their consolidated statements of cash flows. In September 2019, Evergy issued $800.0 million of 2.90% Senior Notes maturing in 2029 and paid $69.8 million to settle an interest rate swap agreement with a notional amount of $500.0 million that was designated as a cash flow hedge of interest payments on the debt issuance. The $69.8 million pre-tax loss was recorded in accumulated other comprehensive loss on Evergy's consolidated balance sheet and is being reclassified into interest expense over the ten Fair Value of Long-Term Debt The Evergy Companies measure the fair value of long-term debt using Level 2 measurements available as of the measurement date. The book value and fair value of the Evergy Companies' long-term debt and long-term debt of variable interest entities is summarized in the following table. December 31, 2021 December 31, 2020 Book Value Fair Value Book Value Fair Value Long-term debt (a) (millions) Evergy (b) $ 9,687.2 $ 10,758.5 $ 9,627.3 $ 11,274.2 Evergy Kansas Central 3,934.2 4,522.5 3,931.5 4,801.7 Evergy Metro 2,925.0 3,400.8 2,923.0 3,591.2 Long-term debt of variable interest entities (a) Evergy $ — $ — $ 18.8 $ 19.1 Evergy Kansas Central — — 18.8 19.1 (a) Includes current maturities. (b) Book value as of December 31, 2021 and 2020, includes $97.9 million and $110.4 million, respectively, of fair value adjustments recorded in connection with purchase accounting for the Great Plains Energy and Evergy Kansas Central merger, which are not part of future principal payments and will amortize over the remaining life of the associated debt instrument. Recurring Fair Value Measurements The following tables include the Evergy Companies' balances of financial assets and liabilities measured at fair value on a recurring basis. Description December 31, 2021 Level 1 Level 2 Level 3 NAV Evergy Kansas Central (millions) Assets Nuclear decommissioning trust (a) Domestic equity funds $ 140.4 $ 126.5 $ — $ — $ 13.9 International equity funds 74.0 74.0 — — — Core bond fund 58.1 58.1 — — — High-yield bond fund 29.6 29.6 — — — Emerging markets bond fund 18.0 18.0 — — — Alternative investments fund 32.7 — — — 32.7 Real estate securities fund 15.2 — — — 15.2 Cash equivalents 0.4 0.4 — — — Total nuclear decommissioning trust 368.4 306.6 — — 61.8 Rabbi trust Fixed income funds 19.6 19.6 — — — Equity funds 9.5 9.5 — — — Combination debt/equity/other fund 2.4 2.4 — — — Cash equivalents 0.2 0.2 — — — Total rabbi trust 31.7 31.7 — — — Total $ 400.1 $ 338.3 $ — $ — $ 61.8 Evergy Metro Assets Nuclear decommissioning trust (a) Equity securities $ 299.2 $ 299.2 $ — $ — $ — Debt securities U.S. Treasury 46.1 46.1 — — — U.S. Agency 0.4 — 0.4 — — State and local obligations 4.0 — 4.0 — — Corporate bonds 43.7 — 43.7 — — Foreign governments 0.1 — 0.1 — — Cash equivalents 6.8 6.8 — — — Other — — — — — Total nuclear decommissioning trust 400.3 352.1 48.2 — — Self-insured health plan trust (b) Equity securities 2.0 2.0 — — — Debt securities 8.7 2.7 6.0 — — Cash and cash equivalents 1.8 1.8 — — — Total self-insured health plan trust 12.5 6.5 6.0 — — Total $ 412.8 $ 358.6 $ 54.2 $ — $ — Other Evergy Other Evergy investments Equity securities (c) $ 31.4 $ — $ 31.4 $ — $ — Total other Evergy investments 31.4 — 31.4 — — Rabbi trusts Core bond fund 12.5 12.5 — — — Total rabbi trusts 12.5 12.5 — — — Total $ 43.9 $ 12.5 $ 31.4 $ — $ — Evergy Assets Nuclear decommissioning trust (a) $ 768.7 $ 658.7 $ 48.2 $ — $ 61.8 Rabbi trusts 44.2 44.2 — — — Self-insured health plan trust (b) 12.5 6.5 6.0 — — Other Evergy investments (c) 31.4 — 31.4 — — Total $ 856.8 $ 709.4 $ 85.6 $ — $ 61.8 Description December 31, 2020 Level 1 Level 2 Level 3 NAV Evergy Kansas Central (millions) Assets Nuclear decommissioning trust (a) Domestic equity funds $ 102.7 $ 95.1 $ — $ — $ 7.6 International equity funds 63.8 63.8 — — — Core bond fund 40.6 40.6 — — — High-yield bond fund 25.0 25.0 — — — Emerging markets bond fund 21.0 21.0 — — — Combination debt/equity/other fund 20.1 20.1 — — — Alternative investments fund 23.2 — — — 23.2 Real estate securities fund 12.9 — — — 12.9 Cash equivalents 0.5 0.5 — — — Total nuclear decommissioning trust 309.8 266.1 — — 43.7 Rabbi trust Core bond fund 25.6 — — — 25.6 Combination debt/equity/other fund 7.1 — — — 7.1 Total rabbi trust 32.7 — — — 32.7 Total $ 342.5 $ 266.1 $ — $ — $ 76.4 Evergy Metro Assets Nuclear decommissioning trust (a) Equity securities $ 243.1 $ 243.1 $ — $ — $ — Debt securities U.S. Treasury 47.7 47.7 — — — U.S. Agency 0.5 — 0.5 — — State and local obligations 4.1 — 4.1 — — Corporate bonds 43.1 — 43.1 — — Foreign governments 0.1 — 0.1 — — Cash equivalents 3.2 3.2 — — — Other 0.5 0.5 — — — Total nuclear decommissioning trust 342.3 294.5 47.8 — — Self-insured health plan trust (b) Equity securities 1.7 1.7 — — — Debt securities 8.0 2.8 5.2 — — Cash and cash equivalents 3.5 3.5 — — — Total self-insured health plan trust 13.2 8.0 5.2 — — Total $ 355.5 $ 302.5 $ 53.0 $ — $ — Other Evergy Assets Rabbi trusts Fixed income fund $ 13.1 $ — $ — $ — $ 13.1 Cash and cash equivalents 0.5 0.5 — — — Total rabbi trusts $ 13.6 $ 0.5 $ — $ — $ 13.1 Evergy Assets Nuclear decommissioning trust (a) $ 652.1 $ 560.6 $ 47.8 $ — $ 43.7 Rabbi trust 46.3 0.5 — — 45.8 Self-insured health plan trust (b) 13.2 8.0 5.2 — — Total $ 711.6 $ 569.1 $ 53.0 $ — $ 89.5 (a) With the exception of investments measured at NAV, fair value is based on quoted market prices of the investments held by the trust and/or valuation models. (b) Fair value is based on quoted market prices of the investments held by the trust. Debt securities classified as Level 1 are comprised of U.S. Treasury securities. Debt securities classified as Level 2 are comprised of corporate bonds, U.S. Agency, state and local obligations, and other asset-backed securities. (c) Fair value is based on quoted market prices adjusted for a discount for lack of marketability based on a valuation model due to a restriction on the sale of the stock. Certain Evergy and Evergy Kansas Central investments included in the table above are measured at NAV as they do not have readily determinable fair values. In certain situations, these investments may have redemption restrictions. The following table provides additional information on these Evergy and Evergy Kansas Central investments. December 31, 2021 December 31, 2020 December 31, 2021 Fair Unfunded Fair Unfunded Redemption Length of Value Commitments Value Commitments Frequency Settlement Evergy Kansas Central (millions) Nuclear decommissioning trust: Domestic equity funds $ 13.9 $ 1.7 $ 7.6 $ 2.2 (a) (a) Alternative investments fund (b) 32.7 — 23.2 — Quarterly 65 days Real estate securities fund (b) 15.2 — 12.9 — Quarterly 65 days Total $ 61.8 $ 1.7 $ 43.7 $ 2.2 Rabbi trust: Core bond fund $ — $ — $ 25.6 $ — (c) (c) Combination debt/equity/other fund — — 7.1 — (c) (c) Total $ — $ — $ 32.7 $ — Other Evergy Rabbi trust: Fixed income fund $ — $ — $ 13.1 $ — (c) (c) Total Evergy investments at NAV $ 61.8 $ 1.7 $ 89.5 $ 2.2 (a) This investment is in five long-term private equity funds that do not permit early withdrawal. Investments in these funds cannot be distributed until the underlying investments have been liquidated, which may take years from the date of initial liquidation. Three funds have begun to make distributions. The initial investment in the fourth and fifth funds occurred in 2016 and 2018, respectively. The fourth fund's term is 15 years, subject to the general partner's right to extend the term for up to three additional one-year periods. The fifth fund's term is 15 years, subject to additional extensions approved by a fund advisory committee to provide for an orderly liquidation of fund investments and dissolution of the fund. (b) There is a holdback on final redemptions. (c) This investment can be redeemed immediately and is not subject to any restrictions on redemptions. The Evergy Companies hold equity and debt investments classified as securities in various trusts including for the purposes of funding the decommissioning of Wolf Creek and for the benefit of certain retired executive officers of Evergy Kansas Central. The Evergy Companies record net realized and unrealized gains and losses on the nuclear decommissioning trusts in regulatory liabilities on their consolidated balance sheets and record net realized and unrealized gains and losses on the Evergy Companies' rabbi trusts in the consolidated statements of income and comprehensive income. The following table summarizes the net unrealized gains (losses) for the Evergy Companies' nuclear decommissioning trusts and rabbi trusts. 2021 2020 2019 Evergy (millions) Nuclear decommissioning trust - equity securities $ 101.8 $ 45.5 74.0 Nuclear decommissioning trust - debt securities (4.5) 5.3 5.1 Rabbi trusts - equity securities (1.8) (5.6) 3.1 Total $ 95.5 $ 45.2 $ 82.2 Evergy Kansas Central Nuclear decommissioning trust - equity securities $ 50.5 $ 21.9 33.3 Rabbi trust - equity securities (1.4) (6.1) 3.2 Total $ 49.1 $ 15.8 $ 36.5 Evergy Metro Nuclear decommissioning trust - equity securities $ 51.3 $ 23.6 40.7 Nuclear decommissioning trust - debt securities (4.5) 5.3 5.1 Total $ 46.8 $ 28.9 $ 45.8

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	12 Months Ended
	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Environmental Matters Set forth below are descriptions of contingencies related to environmental matters that may impact the Evergy Companies' operations or their financial results. Management's assessment of these contingencies, which are based on federal and state statutes and regulations, and regulatory agency and judicial interpretations and actions, has evolved over time. These laws, regulations, interpretations and actions can also change, restrict or otherwise impact the Evergy Companies' operations or financial results. The failure to comply with these laws, regulations, interpretations and actions could result in the assessment of administrative, civil and criminal penalties and the imposition of remedial requirements. The Evergy Companies believe that all their operations are in substantial compliance with current federal, state and local environmental standards. There are a variety of final and proposed laws and regulations that could have a material adverse effect on the Evergy Companies' operations and consolidated financial results. Due in part to the complex nature of environmental laws and regulations, the Evergy Companies are unable to assess the impact of potential changes that may develop with respect to the environmental contingencies described below. Clean Air Act - Startup, Shutdown and Malfunction (SSM) Regulation In 2015, the EPA issued a final rule addressing how state implementation plans (SIPs) can treat excess emissions during SSM events. This rule was referred to as the 2015 SIP Call Rule. The rule required 36 states to submit SIP revisions by November 2016 to remove certain exemptions and other discretionary enforcement provisions that apply to excess emissions during SSM events. Legal challenges ensued and the case was eventually placed in abeyance. In December 2021, the U.S. Court of Appeals for the D.C. Circuit (D.C. Circuit) restarted the 2015 SIP Call Rule litigation. The outcome of this case could result in required SIP revisions in Oklahoma, Kansas and Missouri which could have a material impact on the Evergy Companies. Ozone Interstate Transport State Implementation Plans In 2015, the EPA lowered the Ozone National Ambient Air Quality Standards (NAAQS) from 75 ppb to 70 ppb. Impacted states were required to submit Interstate Transport State Implementation Plans (ITSIPs) in 2018 to comply with the good neighbor provisions of the Clean Air Act. The EPA did not act on these ITSIP submissions and was challenged in a court filing in May 2021 to address them. In January 2022, the U.S. District Court for the Northern District of California entered a final consent decree between the EPA and various environmental groups requiring the EPA to approve or disapprove, in whole or in part, by February 28, 2022, the ITSIPs for the 2015 Ozone NAAQS, for twenty-one states including Kansas, Missouri and Oklahoma. For any ITSIP fully or partially disapproved by the EPA along with a corresponding federal implementation plan (FIP) proposed by February 28, 2022, the consent decree requires the EPA to sign a final action on the ITSIP for the affected state by December 15, 2022. On January 25, 2022, the EPA transmitted a proposed FIP to the Office of Management and Budget for review. On February 8, 2022, the EPA published a proposed approval of the Kansas ITSIP in the Federal Register. On February 22, 2022, the EPA published proposed disapprovals of ITSIPs for nineteen states including Missouri and Oklahoma. The EPA is also in the process of reconsidering the 2020 Ozone NAAQS and the 2020 PM2.5 NAAQS. Due to uncertainty regarding the disposition of these 2015 Ozone NAAQS ITSIPs for Kansas, Missouri and Oklahoma, along with potential lowering of the 2020 NAAQS, the Evergy Companies cannot determine the impacts on their operations or consolidated financial results, but the cost to comply with a FIP or a lower future NAAQS could be material. Regional Haze Rule In 1999, the EPA finalized the Regional Haze Rule which aims to restore national parks and wilderness areas to pristine conditions. The rule requires states in coordination with the EPA, the National Park Service, the U.S. Fish and Wildlife Service, the U.S. Forest Service, and other interested parties to develop and implement air quality protection plans to reduce the pollution that causes visibility impairment. There are 156 "Class I" areas across the U.S. that must be restored to pristine conditions by the year 2064. There are no Class I areas in Kansas, whereas Missouri has two: the Hercules-Glades Wilderness Area and the Mingo Wilderness Area. States must submit revisions to their Regional Haze Rule SIPs every ten years and the first round was due in 2007. For the second ten-year implementation period, the EPA issued a final rule revision in 2017 that allowed states to submit their SIP revisions by July 31, 2021. The Evergy Companies have been in contact with the Kansas Department of Health and Environmental (KDHE) and the Missouri Department of Natural Resources (MDNR) as they worked to draft their SIP revisions. The Missouri SIP revision is still being drafted. MDNR has indicated they intend to submit the Missouri SIP revision in early 2022 and that it will not require any additional reductions from the Evergy Companies' generating units in the state. The Kansas SIP revision was placed on public notice in June 2021 and requested no additional emission reductions by electric utilities based on the significant reductions that were achieved during the first implementation period. The EPA provided comments on the Kansas SIP revision in June 2021 that each state is statutorily required to conduct a "four-factor analysis" on at least two sources within the state to help determine if further emission reductions are necessary. The EPA also stated it would be difficult to approve the Kansas SIP revision if at least two four-factor analyses are not conducted on Kansas emission sources. KDHE submitted the Kansas SIP revision in July 2021. If a Kansas generating unit of the Evergy Companies is selected for analysis, the possibility exists that the state or EPA, through a FIP, could determine that additional operational or physical modifications are required on the generating unit to further reduce emissions. The overall cost of those modifications could be material to the Evergy Companies. Greenhouse Gases Burning coal and other fossil fuels releases carbon dioxide (CO 2 ) and other gases referred to as greenhouse gases (GHG). Various regulations under the federal Clean Air Act Amendments of 1990 (CAA) limit CO 2 and other GHG emissions, and in addition, other measures are being imposed or offered by individual states, municipalities and regional agreements with the goal of reducing GHG emissions. In July 2019, the EPA published the final Affordable Clean Energy (ACE) rule in the Federal Register. This rule contained emission guidelines for GHG emissions from existing electric utility generating units (EGUs) and revisions to emission guideline implementing regulations. The rule defined the "best system of emission reduction" (BSER) for GHG emissions from existing coal-fired EGUs as on-site, heat-rate efficiency improvements. In conjunction with the finalization of the ACE rule, the EPA repealed its previously adopted Clean Power Plan (CPP). In January 2021, the D.C. Circuit vacated and remanded the ACE rule back to the EPA. In October 2021, the Supreme Court granted petitions for certiorari to review the D.C. Circuit decision to vacate and remand the ACE rule. A ruling from the Supreme Court is expected in mid-2022. Due to uncertainty regarding the future of the ACE rule or other potential GHG regulations, the Evergy Companies cannot determine the impacts on their operations or consolidated financial results, but the cost to comply with the ACE rule or other potential GHG rules could be material. Water The Evergy Companies discharge some of the water used in generation and other operations containing substances deemed to be pollutants. A November 2015 EPA rule applicable to steam-electric power generating plants establishes effluent limitations guidelines (ELG) and standards for wastewater discharges, including limits on the amount of toxic metals and other pollutants that can be discharged. Implementation timelines for this 2015 rule vary from 2018 to 2023. In April 2019, the U.S. Court of Appeals for the 5th Circuit (5th Circuit) issued a ruling that vacated and remanded portions of the original ELG rule. Due to this ruling, the EPA announced a plan in July 2021 to release a proposed rulemaking in September 2022 to address the vacated limitations for legacy wastewater and landfill leachate. Future ELG modifications for the best available technology economically achievable for the discharge of legacy wastewater and landfill leachate are likely and could be material to the Evergy Companies. In October 2020, the EPA published the final ELG reconsideration rule. This rule adjusts numeric limits for flue gas desulfurization (FGD) wastewater and adds a 10% volumetric purge limit for bottom ash transport water. The timeline for final FGD wastewater compliance is as soon as possible on or after one year following publication of the final rule in the Federal Register but no later than December 31, 2025. In August 2021, the EPA published notice in the Federal Register that it is initiating a supplemental rulemaking to revise the ELG regulations after completing review of the reconsideration rule as a result of an executive order from President Biden. As part of the rulemaking process, the EPA will determine if more stringent limitations and standards are appropriate. The 2020 ELG reconsideration rule will remain in effect while the EPA undertakes this new rulemaking. The Evergy Companies have reviewed the 2020 ELG reconsideration regulation, and the costs to comply with these changes are not expected to be material. However, the Evergy Companies cannot predict what revisions the EPA may make under its supplemental rulemaking to revise the ELG regulations, and compliance costs associated with any revisions could be material. After reviewing the Navigable Waters Protection Rule as directed by President Biden's administration, the EPA and Department of the Army determined a need to revise the definition to prevent environmental degradation. In December 2021, the EPA and the Department of the Army published a proposed rule that repeals the Navigable Waters Protection Rule and revises the definition of “Waters of the United States.” This proposed rule restores definitions of Waters of the United States that were in place prior to 2015. The Evergy Companies are reviewing the proposed rule and the impact on their operations or consolidated financial results could be material. A second rulemaking is expected in the future which will replace the Navigable Waters Protection Rule. The cost to comply with any future rulemaking that replaces the Navigable Waters Protection Rule could be material to the Evergy Companies. Regulation of Coal Combustion Residuals In the course of operating their coal generation plants, the Evergy Companies produce CCRs, including fly ash, gypsum and bottom ash. The EPA published a rule to regulate CCRs in April 2015 that requires additional CCR handling, processing and storage equipment and closure of certain ash disposal units. The Evergy Companies have recorded AROs for their current estimates for the closure of ash disposal ponds and landfills, but the revision of these AROs may be required in the future due to changes in existing CCR regulations, the results of groundwater monitoring of CCR units or changes in interpretation of existing CCR regulations or changes in the timing or cost to close ash disposal ponds and landfills. If revisions to these AROs are necessary, the impact on the Evergy Companies' operations or consolidated financial results could be material. Nuclear Insurance Nuclear liability, property and accidental outage insurance is maintained for Wolf Creek. These policies contain certain industry standard terms, conditions and exclusions, including, but not limited to, ordinary wear and tear and war. An industry aggregate limit of $3.2 billion for nuclear events ($1.8 billion of non-nuclear events) plus any reinsurance, indemnity or any other source recoverable by Nuclear Electric Insurance Limited (NEIL), provider of property and accidental outage insurance, exists for acts of terrorism affecting Wolf Creek or any other NEIL insured plant within 12 months from the date of the first act. In addition, participation is required in industry-wide retrospect assessment programs as discussed below. Nuclear Liability Insurance Pursuant to the Price-Anderson Act, liability insurance includes coverage against public nuclear liability claims resulting from nuclear incidents to the required limit of public liability, which is approximately $13.6 billion. This limit of liability consists of the maximum available commercial insurance of $0.5 billion and the remaining $13.1 billion is provided through mandatory participation in an industry-wide retrospective assessment program. Under this retrospective assessment program, the owners of Wolf Creek are jointly and severally subject to an assessment of up to $137.6 million (Evergy's share is $129.4 million and each of Evergy Kansas Central's and Evergy Metro's is $64.7 million), payable at no more than $20.5 million (Evergy's share is $19.2 million and each of Evergy Kansas Central's and Evergy Metro's is $9.6 million) per incident per year per reactor for any commercial U.S. nuclear reactor qualifying incident. Both the total and yearly assessment is subject to an inflationary adjustment based on the Consumer Price Index and applicable premium taxes. In addition, the U.S. Congress could impose additional revenue-raising measures to pay claims. Nuclear Property and Accidental Outage Insurance The owners of Wolf Creek carry decontamination liability, nuclear property damage and premature nuclear decommissioning liability insurance for Wolf Creek totaling approximately $2.8 billion. Insurance coverage for non-nuclear property damage accidents total approximately $2.3 billion. In the event of an extraordinary nuclear accident, insurance proceeds must first be used for reactor stabilization and site decontamination in accordance with a plan mandated by the NRC. The Evergy Companies' share of any remaining proceeds can be used to pay for property damage or, if certain requirements are met, including decommissioning the plant, toward a shortfall in the nuclear decommissioning trust fund. The owners also carry additional insurance with NEIL to help cover costs of replacement power and other extra expenses incurred during a prolonged outage resulting from accidental property damage at Wolf Creek. If significant losses were incurred at any of the nuclear plants insured under the NEIL policies, the owners of Wolf Creek may be subject to retrospective assessments under the current policies of approximately $30.0 million (Evergy's share is $28.2 million and each of Evergy Kansas Central's and Evergy Metro's is $14.1 million). Nuclear Insurance Considerations Although the Evergy Companies maintain various insurance policies to provide coverage for potential losses and liabilities resulting from an accident or an extended outage, the insurance coverage may not be adequate to cover the costs that could result from a catastrophic accident or extended outage at Wolf Creek. Any substantial losses not covered by insurance, to the extent not recoverable in prices, would have a material effect on the Evergy Companies' consolidated financial results. Contractual Commitments - Fuel and Power The Evergy Companies' contractual commitments for fuel and power at December 31, 2021 are detailed in the following tables. See Notes 9, 12 and 20 for information regarding pension, long-term debt and lease commitments, respectively. Evergy 2022 2023 2024 2025 2026 After 2026 Total Purchase commitments (millions) Fuel $ 403.1 $ 183.5 $ 130.2 $ 100.4 $ 106.7 $ 221.1 $ 1,145.0 Power 63.0 63.6 58.0 58.4 58.4 294.2 595.6 Total fuel and power commitments $ 466.1 $ 247.1 $ 188.2 $ 158.8 $ 165.1 $ 515.3 $ 1,740.6 Evergy Kansas Central 2022 2023 2024 2025 2026 After 2026 Total Purchase commitments (millions) Fuel $ 232.4 $ 102.6 $ 83.3 $ 69.4 $ 72.6 $ 121.3 $ 681.6 Power 0.9 0.9 0.9 0.9 0.9 3.6 8.1 Total fuel and power commitments $ 233.3 $ 103.5 $ 84.2 $ 70.3 $ 73.5 $ 124.9 $ 689.7 Evergy Metro 2022 2023 2024 2025 2026 After 2026 Total Purchase commitments (millions) Fuel $ 145.3 $ 73.7 $ 43.3 $ 28.4 $ 31.4 $ 99.8 $ 421.9 Power 35.1 35.3 29.2 29.2 29.2 166.9 324.9 Total fuel and power commitments $ 180.4 $ 109.0 $ 72.5 $ 57.6 $ 60.6 $ 266.7 $ 746.8

GUARANTEES

GUARANTEES	12 Months Ended
	Dec. 31, 2021
Guarantees [Abstract]
GUARANTEES	GUARANTEES In the ordinary course of business, Evergy and certain of its subsidiaries enter into various agreements providing financial or performance assurance to third parties on behalf of certain subsidiaries. Such agreements include, for example, guarantees and letters of credit. These agreements are entered into primarily to support or enhance the creditworthiness otherwise attributed to a subsidiary on a stand-alone basis, thereby facilitating the extension of sufficient credit to accomplish the subsidiary's intended business purposes. The majority of these agreements guarantee Evergy's own future performance, so a liability for the fair value of the obligation is not recorded. At December 31, 2021, Evergy has provided $904.0 million of credit support for certain of its subsidiaries as follows: • Evergy direct guarantees to Evergy Kansas Central and Evergy Metro counterparties for certain fuel supply contracts totaling $48.0 million, which expire in 2027; and • Evergy's guarantee of Evergy Missouri West long-term debt totaling $856.0 million, which includes debt with maturity dates ranging from 2022 to 2043. Evergy has also guaranteed Evergy Missouri West's commercial paper program. At December 31, 2021, Evergy Missouri West had $395.3 million of commercial paper outstanding. None of the guaranteed obligations are subject to default or prepayment if Evergy Missouri West's credit ratings were downgraded.

RELATED PARTY TRANSACTIONS AND

RELATED PARTY TRANSACTIONS AND RELATIONSHIPS	12 Months Ended
	Dec. 31, 2021
Related Party Transactions [Abstract]
RELATED PARTY TRANSACTIONS AND RELATIONSHIPS	RELATED PARTY TRANSACTIONS AND RELATIONSHIPS In the normal course of business, Evergy Kansas Central, Evergy Metro and Evergy Missouri West engage in related party transactions with one another. A summary of these transactions and the amounts associated with them is provided below. Jointly-Owned Plants and Shared Services Employees of Evergy Kansas Central and Evergy Metro manage Evergy Missouri West's business and operate its facilities at cost, including Evergy Missouri West's 18% ownership interest in Evergy Metro's Iatan Nos. 1 and 2. Employees of Evergy Kansas Central manage Jeffrey Energy Center (JEC) and operate its facilities at cost, including Evergy Missouri West's 8% ownership interest in JEC. Employees of Evergy Metro manage La Cygne Station and operate its facilities at cost, including Evergy Kansas Central's 50% interest in La Cygne Station. Employees of Evergy Metro and Evergy Kansas Central also provide one another with shared service support, including costs related to human resources, information technology, accounting and legal services. The operating expenses and capital costs billed for jointly-owned plants and shared services are detailed in the following table. 2021 2020 2019 (millions) Evergy Kansas Central billings to Evergy Missouri West $ 32.5 $ 37.6 $ 24.9 Evergy Metro billings to Evergy Missouri West 142.1 168.7 172.8 Evergy Kansas Central billings to Evergy Metro 29.4 34.7 40.6 Evergy Metro billings to Evergy Kansas Central 134.7 130.8 154.9 Money Pool Evergy Kansas Central, Evergy Metro and Evergy Missouri West are authorized to participate in the Evergy, Inc. money pool, which is an internal financing arrangement in which funds may be lent on a short-term basis between Evergy Kansas Central, Evergy Metro, Evergy Missouri West and Evergy, Inc. Evergy, Inc. can lend but not borrow under the money pool. The Evergy, Inc. money pool was amended in July 2021 to include Evergy Kansas Central as a participant. At December 31, 2021, Evergy Metro had a $155.0 million outstanding receivable from Evergy Missouri West under the money pool. At December 31, 2020, Evergy Metro had a $100.0 million outstanding receivable from Evergy Missouri West under the money pool. Related Party Net Receivables and Payables The following table summarizes Evergy Kansas Central's and Evergy Metro's related party net receivables and payables. December 31 2021 2020 Evergy Kansas Central (millions) Net receivable from (payable to) Evergy $ (2.2) $ 0.1 Net payable to Evergy Metro (14.5) (21.7) Net receivable from Evergy Missouri West 10.4 6.6 Evergy Metro Net receivable from Evergy $ 8.7 $ 15.7 Net receivable from Evergy Kansas Central 14.5 21.7 Net receivable from Evergy Missouri West 254.5 188.1 Tax Allocation Agreement Evergy files a consolidated federal income tax return as well as unitary and combined income tax returns in several state jurisdictions with Kansas and Missouri being the most significant. Income taxes for consolidated or combined subsidiaries are allocated to the subsidiaries based on separate company computations of income or loss. The following table summarizes Evergy Kansas Central's and Evergy Metro's income taxes receivable from (payable to) Evergy. December 31 2021 2020 Evergy Kansas Central (millions) Income taxes receivable from Evergy $ 9.6 $ 25.3 Evergy Metro Income taxes receivable from (payable to) Evergy $ (2.5) $ 3.2

SHAREHOLDERS' EQUITY

SHAREHOLDERS' EQUITY	12 Months Ended
	Dec. 31, 2021
Stockholders' Equity Note [Abstract]
SHAREHOLDERS' EQUITY	SHAREHOLDERS' EQUITY Evergy's authorized capital stock consists of 600 million shares of common stock, without par value, and 12 million shares of Preference Stock, without par value. Bluescape Energy Partners, LLC (Bluescape) Securities Purchase Agreement In February 2021, Evergy entered into a securities purchase agreement with an affiliate of Bluescape. Pursuant to the securities purchase agreement, an affiliate of Bluescape agreed to purchase 2,269,447 shares of Evergy’s common stock for approximately $113.2 million and to receive a warrant to purchase up to 3,950,000 additional shares of Evergy’s common stock. Under the terms of the warrant, Evergy will have the option to elect a net cash settlement with respect to the exercise of the warrant under certain circumstances, or to net settle in shares of Evergy’s common stock. The warrant expires three years from issuance and has an exercise price equal to $64.70 per share. Following the satisfaction of customary closing conditions, Evergy completed the sale of its common stock and warrant to the affiliate of Bluescape in April 2021 for $112.5 million, net of issuance costs of $0.7 million. The Executive Chairman of Bluescape, C. John Wilder, joined the Evergy Board in March 2021. Evergy Registration Statements In September 2021, Evergy filed an automatic registration statement providing for the sale of unlimited amounts of securities with the SEC, which expires in September 2024. In September 2021, Evergy registered shares of its common stock with the SEC for its Dividend Reinvestment and Direct Stock Purchase Plan. Shares issued under the plan may be either newly issued shares or shares purchased on the open market. Evergy has registered shares of its common stock with the SEC for the Evergy, Inc. 401(k) Savings Plan. Shares issued under the plan may be either newly issued shares or shares purchased on the open market. Dividend Restrictions Evergy depends on its subsidiaries to pay dividends on its common stock. The Evergy Companies have certain restrictions stemming from statutory requirements, corporate organizational documents, covenants and other conditions that could affect dividend levels or the ability to pay dividends. The KCC order authorizing the merger transaction requires Evergy to maintain consolidated common equity of at least 35% of total consolidated capitalization. Under the Federal Power Act, Evergy Kansas Central, Evergy Metro and Evergy Missouri West generally can pay dividends only out of retained earnings. Certain conditions in the MPSC and KCC orders authorizing the merger transaction also require Evergy Kansas Central and Evergy Metro to maintain consolidated common equity of at least 40% of total capitalization. Other conditions in the MPSC and KCC merger orders require Evergy Kansas Central, Evergy Metro and Evergy Missouri West to maintain credit ratings of at least investment grade. If Evergy Kansas Central's, Evergy Metro's or Evergy Missouri West's credit ratings are downgraded below the investment grade level as a result of their affiliation with Evergy or any of Evergy's affiliates, the impacted utility shall not pay a dividend to Evergy without KCC or MPSC approval or until the impacted utility's investment grade credit rating has been restored. The master credit facility of Evergy, Evergy Kansas Central, Evergy Metro and Evergy Missouri West and the note purchase agreements for certain Evergy Missouri West senior notes contain covenants requiring the respective company to maintain a consolidated indebtedness to consolidated total capitalization ratio of not more than 0.65 to 1.00 at all times. As of December 31, 2021, all of Evergy's and Evergy Kansas Central's retained earnings and net income were free of restrictions and Evergy Metro had a retained earnings restriction of $386.9 million. As of December 31, 2021, Evergy's subsidiaries had restricted net assets of approximately $5.7 billion. These restrictions are not expected to affect the Evergy Companies' ability to pay dividends at the current level for the foreseeable future.

VARIABLE INTEREST ENTITIES

VARIABLE INTEREST ENTITIES	12 Months Ended
	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
VARIABLE INTEREST ENTITIES	VARIABLE INTEREST ENTITIES In determining the primary beneficiary of a VIE, the Evergy Companies assess the entity's purpose and design, including the nature of the entity's activities and the risks that the entity was designed to create and pass through to its variable interest holders. A reporting enterprise is deemed to be the primary beneficiary of a VIE if it has (a) the power to direct the activities of the VIE that most significantly impact the VIE's economic performance and (b) the obligation to absorb losses or right to receive benefits from the VIE that could potentially be significant to the VIE. The primary beneficiary of a VIE is required to consolidate the VIE. The trust holding an 8% interest in JEC was a VIE until the expiration of a purchase option in July 2017 and then became a VIE again during 2019 until the 8% interest was purchased by Evergy Kansas Central in August 2019. The trust holding Evergy Kansas Central's 50% interest in La Cygne Unit 2 is a VIE and Evergy Kansas Central remains the primary beneficiary of the trust. All involvement with entities by the Evergy Companies is assessed to determine whether such entities are VIEs and, if so, whether or not the Evergy Companies are the primary beneficiaries of the entities. The Evergy Companies also continuously assess whether they are the primary beneficiary of the VIE with which they are involved. Prospective changes in facts and circumstances may cause identification of the primary beneficiary to be reconsidered. 8% Interest in JEC Under an agreement that expired in August 2019, Evergy Kansas Central leased an 8% interest in JEC from a trust. The trust was financed with an equity contribution from an owner participant and debt issued by the trust. The trust was created specifically to purchase the 8% interest in JEC and lease it to a third party and did not hold any other assets. Evergy Kansas Central met the requirements to be considered the primary beneficiary of the trust until July 2017, when a contractual option to purchase the 8% interest in the plant covered by the lease expired. Accordingly, Evergy Kansas Central deconsolidated the trust in 2017. Evergy Kansas Central then reconsolidated the trust as a VIE in the first quarter of 2019 following an agreement with the owner to purchase the 8% interest in JEC from the trust in August 2019. Evergy Kansas Central deconsolidated the trust for the final time following the closing of this purchase in August 2019. 50% Interest in La Cygne Unit 2 Under an agreement that expires in September 2029, Evergy Kansas Central entered into a sale-leaseback transaction with a trust under which the trust purchased Evergy Kansas Central's 50% interest in La Cygne Unit 2 and subsequently leased it back to Evergy Kansas Central. The trust was financed with an equity contribution from an owner participant and debt issued by the trust. The trust was created specifically to purchase the 50% interest in La Cygne Unit 2 and lease it back to Evergy Kansas Central and does not hold any other assets. Evergy Kansas Central meets the requirements to be considered the primary beneficiary of the trust. In determining the primary beneficiary of the trust, Evergy Kansas Central concluded that the activities of the trust that most significantly impact its economic performance and that Evergy Kansas Central has the power to direct include (1) the operation and maintenance of the 50% interest in La Cygne Unit 2 and (2) Evergy Kansas Central's ability to exercise a purchase option at the end of the agreement at the lesser of fair value or a fixed amount. Evergy Kansas Central has the potential to receive benefits from the trust that could potentially be significant if the fair value of the 50% interest in La Cygne Unit 2 at the end of the agreement is greater than the fixed amount. The following table summarizes the assets and liabilities related to the VIE described above that are recorded on Evergy's and Evergy Kansas Central's consolidated balance sheets. December 31 2021 2020 Assets: (millions) Property, plant and equipment of variable interest entities, net $ 147.8 $ 154.9 Liabilities: Current maturities of long-term debt of variable interest entities $ — $ 18.8 Accrued interest (a) — 0.1 (a) Included in accrued interest on Evergy's and Evergy Kansas Central's consolidated balance sheets. All of the liabilities noted in the table above relate to the purchase of the property, plant and equipment of the VIE. The assets of the VIE can be used only to settle obligations of the VIE and the VIE's debt holders have no recourse to the general credit of Evergy and Evergy Kansas Central. Evergy and Evergy Kansas Central have not provided financial or other support to the VIE and are not required to provide such support. Evergy and Evergy Kansas Central did not record any gain or loss upon the initial consolidation of the VIE.

TAXES

TAXES	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
TAXES	TAXES Components of income tax expense are detailed in the following tables. Evergy 2021 2020 2019 Current income taxes (millions) Federal $ 15.6 $ (26.8) $ (39.5) State (0.4) 2.1 15.0 Total 15.2 (24.7) (24.5) Deferred income taxes Federal 92.8 73.1 93.2 State 14.7 59.8 27.5 Total 107.5 132.9 120.7 Investment tax credit Deferral 0.4 — 5.2 Amortization (5.7) (6.0) (4.4) Total (5.3) (6.0) 0.8 Income tax expense $ 117.4 $ 102.2 $ 97.0 Evergy Kansas Central 2021 2020 2019 Current income taxes (millions) Federal $ 53.3 $ 14.5 $ 37.9 State (0.2) (5.3) 2.6 Total 53.1 9.2 40.5 Deferred income taxes Federal 3.8 (16.7) (8.9) State (1.2) 168.1 18.4 Total 2.6 151.4 9.5 Investment tax credit Deferral 0.3 — 5.2 Amortization (4.3) (4.8) (3.1) Total (4.0) (4.8) 2.1 Income tax expense $ 51.7 $ 155.8 $ 52.1 Evergy Metro 2021 2020 2019 Current income taxes (millions) Federal $ 39.2 $ (0.2) $ 43.9 State 3.2 10.8 22.4 Total 42.4 10.6 66.3 Deferred income taxes Federal 6.5 29.8 (24.5) State 4.8 (32.2) (5.0) Total 11.3 (2.4) (29.5) Investment tax credit Amortization (1.3) (1.1) (1.1) Total (1.3) (1.1) (1.1) Income tax expense $ 52.4 $ 7.1 $ 35.7 Effective Income Tax Rates Effective income tax rates reflected in the financial statements and the reasons for their differences from the statutory federal rates are detailed in the following tables. Evergy 2021 2020 2019 Federal statutory income tax 21.0 % 21.0 % 21.0 % COLI policies (1.0) (1.6) (1.8) State income taxes 1.0 4.3 5.0 Flow through depreciation for plant-related differences (5.4) (5.3) (4.5) Federal tax credits (2.8) (4.6) (4.9) Non-controlling interest (0.3) (0.3) (0.4) AFUDC equity (0.6) (0.5) (0.1) Amortization of federal investment tax credits (0.4) (0.6) (0.5) Changes in uncertain tax positions, net — — (0.2) Federal or state tax rate change — 1.9 — Valuation allowance — (0.2) (1.0) Stock compensation — (0.1) 0.1 Officer compensation limitation 0.5 0.2 0.1 Other (0.4) (0.2) (0.4) Effective income tax rate 11.6 % 14.0 % 12.4 % Evergy Kansas Central 2021 2020 2019 Federal statutory income tax 21.0 % 21.0 % 21.0 % COLI policies (1.7) (2.8) (3.3) State income taxes (0.4) 3.8 5.3 Flow through depreciation for plant-related differences (3.0) (0.1) (0.1) Federal tax credits (5.0) (7.1) (7.4) Non-controlling interest (0.5) (0.6) (0.8) AFUDC equity (0.6) (0.5) (0.1) Amortization of federal investment tax credits (0.5) (0.7) (0.7) Changes in uncertain tax positions, net — — (0.4) Federal or state tax rate change — 27.8 — Valuation allowance — — (0.4) Stock compensation (0.1) (0.1) (0.1) Officer compensation limitation 0.3 — — Other (0.1) (0.9) (0.3) Effective income tax rate 9.4 % 39.8 % 12.7 % Evergy Metro 2021 2020 2019 Federal statutory income tax 21.0 % 21.0 % 21.0 % COLI policies (0.2) (0.3) (0.2) State income taxes 1.7 4.9 4.7 Flow through depreciation for plant-related differences (7.8) (10.0) (9.4) Federal tax credits (0.2) (1.9) (2.5) AFUDC equity (0.7) (0.5) (0.2) Amortization of federal investment tax credits (0.4) (0.4) (0.4) Federal or state tax rate change — (10.5) — Stock compensation — (0.4) — Officer compensation limitation 0.9 0.4 0.3 Other 0.1 — (1.0) Effective income tax rate 14.4 % 2.3 % 12.3 % Deferred Income Taxes The tax effects of major temporary differences resulting in deferred income tax assets (liabilities) in the consolidated balance sheets is in the following table. December 31 2021 2020 Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Deferred tax assets: (millions) Tax credit carryforward $ 375.2 $ 206.3 $ 162.1 $ 379.6 $ 176.5 $ 195.9 Income taxes refundable to customers, net 336.6 168.5 123.8 418.2 237.5 132.8 Deferred employee benefit costs 158.3 84.8 86.8 227.6 105.4 117.9 Net operating loss carryforward 40.2 — — 51.0 — 0.2 Deferred state income taxes 146.9 101.0 38.6 145.9 101.7 37.8 Accrued liabilities 157.6 71.3 56.4 152.7 61.8 61.0 Other 200.0 100.6 59.6 181.0 91.4 44.8 Total deferred tax assets before 1,414.8 732.5 527.3 1,556.0 774.3 590.4 Valuation allowances (12.8) — — (14.4) — — Total deferred tax assets, net 1,402.0 732.5 527.3 1,541.6 774.3 590.4 Deferred tax liabilities: Plant-related (2,701.1) (1,308.7) (996.7) (2,693.7) (1,341.2) (972.1) Deferred employee benefit costs (96.8) (52.9) (43.5) (171.4) (75.6) (76.3) ARO regulatory assets (133.7) (53.9) (49.9) (136.7) (49.9) (54.3) Acquisition premium (43.9) (43.9) — (46.9) (46.9) — Other regulatory assets (152.1) (53.3) (20.4) (28.8) (2.8) (16.4) Other (136.3) (87.7) (22.9) (128.9) (82.4) (30.1) Total deferred tax liabilities (3,263.9) (1,600.4) (1,133.4) (3,206.4) (1,598.8) (1,149.2) Net deferred income tax liabilities $ (1,861.9) $ (867.9) $ (606.1) $ (1,664.8) $ (824.5) $ (558.8) Tax Credit Carryforwards At December 31, 2021 and 2020, Evergy had $373.6 million and $379.6 million, respectively, of federal general business income tax credit carryforwards. At December 31, 2021 and 2020, Evergy Kansas Central had $204.7 million and $176.5 million, respectively, of federal general business income tax credit carryforwards. At December 31, 2021 and 2020, Evergy Metro had $162.1 million and $195.9 million, respectively, of federal general business income tax credit carryforwards. The carryforwards for Evergy, Evergy Kansas Central and Evergy Metro relate primarily to wind production tax credits and advanced coal investment tax credits and expire in the years 2022 to 2041. Approximately $0.1 million of Evergy's credits are related to Low Income Housing credits that were acquired in Great Plains Energy's acquisition of Evergy Missouri West. Due to federal limitations on the utilization of income tax attributes acquired in the Evergy Missouri West acquisition, Evergy expects a portion of these credits to expire unutilized and has provided a valuation allowance against $0.1 million of the federal income tax benefit. The year of origin of Evergy's, Evergy Kansas Central's and Evergy Metro's related tax benefit amounts for federal tax credit carryforwards as of December 31, 2021 are detailed in the following table. Amount of Benefit Year of Origin Evergy Evergy Kansas Central Evergy Metro (millions) 2004 0.1 — — 2005 0.1 — — 2006 0.1 — — 2007 0.1 — — 2009 38.2 0.2 37.9 2010 18.3 — 18.2 2011 13.3 — 13.2 2012 12.8 2.0 10.7 2013 24.3 11.3 12.9 2014 24.1 10.7 13.0 2015 24.7 10.9 13.2 2016 27.1 11.0 12.4 2017 43.9 35.1 8.2 2018 43.9 36.3 7.5 2019 37.7 30.9 6.7 2020 35.9 28.3 7.4 2021 29.0 28.0 0.8 $ 373.6 $ 204.7 $ 162.1 Net Operating Loss Carryforwards At December 31, 2021 and 2020, Evergy had $33.6 million and $42.2 million, respectively, of tax benefits related to federal net operating loss (NOL) carryforwards. Approximately $7.1 million of Evergy's tax benefits at December 31, 2021 are related to NOLs that were acquired in the Evergy Missouri West acquisition. Due to federal limitations on the utilization of income tax attributes acquired in the Evergy Missouri West acquisition, Evergy expects a portion of these federal NOL carryforwards to expire unutilized and has provided a valuation allowance against $7.1 million of the federal income tax benefit. The federal NOL carryforwards expire in years 2023 to 2024. The year of origin of Evergy's related tax benefit amounts for federal NOL carryforwards as of December 31, 2021 are detailed in the following table. Year of Origin Amount of Benefit (millions) 2005 $ 1.9 2006 31.7 $ 33.6 In addition, Evergy also had deferred tax benefits of $6.6 million and $8.8 million related to state NOLs as of December 31, 2021 and 2020, respectively. Evergy Metro had deferred tax benefits of $0.2 million related to state NOLs as of 2020. The state NOL carryforwards expire in years 2022 to 2038. Evergy does not expect to utilize $5.6 million of NOLs before the expiration date of the carryforwards of NOLs in certain states. Therefore, a valuation allowance has been provided against $5.6 million of state tax benefits. Alternative Minimum Tax (AMT) Carryforwards At December 31, 2021, Evergy and Evergy Kansas Central had $1.6 million of federal AMT carryforwards. Valuation Allowances Evergy is required to assess the ultimate realization of deferred tax assets using a "more likely than not" assessment threshold. This assessment takes into consideration tax planning strategies within Evergy's control. As a result of this assessment, Evergy has established a partial valuation allowance for federal and state tax NOL carryforwards and tax credit carryforwards. During 2021, $1.5 million of tax benefit was recorded in continuing operations primarily related to utilization or expiration of certain state NOL carryforwards. Uncertain Tax Positions Evergy is considered open to U.S. federal examination for years after 2009 due to the carryforward of net operating losses and general business income tax credits. With few exceptions, Evergy is no longer subject to state and local tax examinations by tax authorities for years before 2016. As of December 31, 2021, Evergy does not have any significant income tax issues under examination. Kansas Tax Reform In May 2020, the state of Kansas exempted certain public utilities, including Evergy Kansas Central and Evergy Metro, from Kansas corporate income tax beginning in 2021 and authorized the KCC to approve changes in rates related to increases or decreases in federal or state income tax rates. As a result of the exemption from Kansas corporate income tax, the Evergy Companies revalued their deferred income tax assets and liabilities in May 2020. Evergy decreased its net deferred income tax liabilities by $233.8 million, primarily consisting of a $400.4 million adjustment for the revaluation of deferred income tax assets and liabilities included in rate base and a $31.7 million tax gross-up adjustment on this amount for ratemaking purposes and $13.8 million of income tax expense primarily related to the revaluation of deferred income taxes that will not be recovered from customers in future rates; partially offset by a decrease to unamortized investment tax credits of $183.6 million due to the revaluation of certain Kansas income tax credits and a $16.9 million tax gross-up adjustment on this amount for ratemaking purposes. Evergy Kansas Central decreased its net deferred income tax liabilities by $17.6 million, primarily consisting of a $293.7 million adjustment for the revaluation of deferred income tax assets and liabilities included in rate base and a $17.3 million tax gross-up adjustment on this amount for ratemaking purposes; partially offset by a decrease to unamortized investment tax credits of $183.6 million due to the revaluation of certain Kansas income tax credits and a $16.9 million tax gross-up adjustment on this amount for ratemaking purposes and $109.0 million of income tax expense primarily related to the revaluation of deferred income taxes that will not be recovered from customers in future rates. Evergy Metro decreased its net deferred income tax liabilities by $152.9 million, primarily consisting of a $106.7 million adjustment for the revaluation of deferred income tax assets and liabilities included in rate base and a $14.4 million tax gross-up adjustment on this amount for ratemaking purposes and $32.2 million of income tax benefit primarily related to the revaluation of deferred income taxes that will not be refunded to customers in future rates. The changes to the Evergy Companies' net deferred income tax liabilities included in rate base were offset by corresponding changes in regulatory liabilities. The net regulatory liabilities will be refunded to customers in future rates by amortizing the amounts related to plant assets over the remaining useful life of the assets, and amortizing the amounts related to other items over a period to be determined in a future rate case. The changes to the Evergy Companies' unamortized investment tax credits were related to the portion of certain Kansas income tax credits that are not expected to be used after December 31, 2020. The amounts of income tax expense (benefit) recognized by the Evergy Companies related to the revaluation of deferred income taxes that will not be recovered from or refunded to customers in future rates primarily pertain to deferred tax adjustments related to the difference between Evergy's consolidated tax rate and the statutory tax rates used for setting rates at Evergy Kansas Central, Evergy Metro and Evergy Missouri West as well as deferred income tax adjustments related to non-regulated operations.

LEASES

LEASES	12 Months Ended
	Dec. 31, 2021
Leases [Abstract]
LEASES	LEASES The Evergy Companies lease office buildings, computer equipment, vehicles, rail cars, generating plant and other property and equipment, including rail cars to serve jointly-owned generating units where Evergy Kansas Central or Evergy Metro is the managing partner and is reimbursed by other joint-owners for the other owners' proportionate share of the costs. Under GAAP, a contract is or contains a lease if the contract conveys the right to control the use of identified property, plant or equipment for a period of time in exchange for consideration. The Evergy Companies assess a contract as being or containing a lease if the contract identifies property, plant and equipment, provides the lessee the right to obtain substantially all of the economic benefits from use of the property, plant and equipment and provides the lessee the right to direct the use of the property, plant and equipment. The Evergy Companies have entered into several agreements to purchase energy through renewable purchase power agreements that are accounted for as leases that commenced prior to the application of Topic 842-Leases . Due to the intermittent nature of renewable generation, these leases have significant variable lease payments not included in the initial and subsequent measurement of the lease liability. Variable lease payments are expensed as incurred. In addition, certain other contracts contain payment for activity that transfers a separate good or service such as utilities or common area maintenance. The Evergy Companies have elected a practical expedient permitted by GAAP to not separate such components of the lease from other lease components for all leases. The Evergy, Evergy Kansas Central and Evergy Metro leases have remaining terms ranging from 1 to 17 years, 1 to 17 years and 1 to 11 years, respectively. Leases that have original lease terms of twelve months or less are not recognized on the Evergy Companies’ balance sheets. Some leases have options to renew the lease or terminate early at the election of the Evergy Companies. Judgment is applied at lease commencement to determine the reasonably certain lease term based on then-current assumptions about use of the leased asset, market conditions and terms in the contract. The judgment applied to determine the lease term can significantly impact the measurement of the lease liability and right-of-use asset and lease classification. The Evergy Companies typically discount lease payments over the term of the lease using their incremental borrowing rates at lease commencement to measure its initial and subsequent lease liability. For leases that existed at the initial application of Topic 842, the Evergy Companies used the incremental borrowing rates that corresponded to the remaining lease term as of January 1, 2019. Leases may be classified as either operating leases or finance leases. The lease classification is based on assumptions of the lease term and discount rate, as discussed above, and the fair market value and economic life of the leased asset. Operating leases recognize a consistent expense each period over the lease term, while finance leases will result in the separate presentation of interest expense on the lease liability and amortization of the right-of-use asset. Finance leases are treated as operating leases for rate-making purposes and as such, the Evergy Companies defer to a regulatory asset or liability any material differences between expense recognition and the timing of payments in order to match what is being recovered in customer rates. The Evergy Companies’ lease expense is detailed in the following table. Evergy 2021 2020 2019 Finance lease costs (millions) Amortization of right-of-use assets $ 5.1 $ 7.7 $ 5.2 Interest on lease liabilities 2.5 3.1 2.9 Operating lease costs 21.8 22.9 23.8 Short-term lease costs 5.9 2.1 4.0 Variable lease costs for renewable purchase power agreements 280.3 296.6 313.0 Total lease costs $ 315.6 $ 332.4 $ 348.9 Evergy Kansas Central 2021 2020 2019 Finance lease costs (millions) Amortization of right-of-use assets $ 4.5 $ 7.2 $ 5.0 Interest on lease liabilities 2.4 2.8 2.7 Operating lease costs 12.9 11.9 13.2 Short-term lease costs 1.8 0.5 1.2 Variable lease costs for renewable purchase power agreements 145.8 135.6 130.8 Total lease costs $ 167.4 $ 158.0 $ 152.9 Evergy Metro 2021 2020 2019 Finance lease costs (millions) Amortization of right-of-use assets $ 0.4 $ 0.3 $ 0.1 Interest on lease liabilities 0.1 0.1 0.1 Operating lease costs 9.0 9.3 9.2 Short-term lease costs 3.0 1.5 2.6 Variable lease costs for renewable purchase power agreements 101.0 112.2 129.2 Total lease costs $ 113.5 $ 123.4 $ 141.2 Supplemental cash flow information related to the Evergy Companies' leases is detailed in the following table. Evergy 2021 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: (millions) Operating cash flows from operating leases $ 20.7 $ 22.2 $ 21.7 Operating cash flows from finance leases 2.6 2.8 2.8 Financing cash flows from finance leases 5.3 5.6 5.0 Right-of-use assets obtained in exchange for new operating lease liabilities 16.4 6.9 10.4 Right-of-use assets obtained in exchange for new finance lease liabilities 1.4 5.6 8.3 Evergy Kansas Central 2021 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: (millions) Operating cash flows from operating leases $ 11.8 $ 12.9 $ 13.7 Operating cash flows from finance leases 2.4 2.5 2.6 Financing cash flows from finance leases 4.7 5.1 4.8 Right-of-use assets obtained in exchange for new operating lease liabilities 7.1 6.6 6.1 Right-of-use assets obtained in exchange for new finance lease liabilities 1.4 4.0 8.3 Evergy Metro 2021 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: (millions) Operating cash flows from operating leases $ 10.4 $ 10.8 $ 9.9 Operating cash flows from finance leases 0.1 0.1 0.1 Financing cash flows from finance leases 0.5 0.4 0.1 Right-of-use assets obtained in exchange for new operating lease liabilities 9.3 0.3 2.4 Right-of-use assets obtained in exchange for new finance lease liabilities — 1.6 — Finance Leases Right-of-use assets for finance leases are included in property, plant and equipment on the Evergy Companies’ balance sheets. Lease liabilities for finance leases are included in other current and other long-term liabilities. Payments and other supplemental information for finance leases as of December 31, 2021, are detailed in the following table. Evergy Evergy Kansas Central Evergy Metro (millions) 2022 $ 7.8 $ 7.1 $ 0.6 2023 6.7 5.9 0.6 2024 5.5 4.7 0.6 2025 4.7 4.2 0.3 2026 4.4 3.9 0.2 After 2026 38.5 37.8 0.3 Total finance lease payments 67.6 63.6 2.6 Amounts representing imputed interest (21.3) (20.6) (0.4) Present value of lease payments 46.3 43.0 2.2 Less: current portion (5.4) (4.9) (0.5) Total long-term obligations under finance leases $ 40.9 $ 38.1 $ 1.7 Right-of-use assets under finance leases included in property, plant and equipment, net on the consolidated balance sheets $ 310.3 $ 50.6 $ 2.2 Weighted-average remaining lease term (years) 13.3 13.9 5.0 Weighted-average discount rate 5.6 % 5.6 % 5.1 % Operating Leases Right-of-use assets for operating leases are included in other long-term assets on the Evergy Companies’ balance sheets. Lease liabilities for operating leases are included in other current and other long-term liabilities. Lease payments and other supplemental information for operating leases as of December 31, 2021, are detailed in the following table. Evergy Evergy Kansas Central Evergy Metro (millions) 2022 $ 18.8 $ 9.4 $ 9.2 2023 15.3 6.5 8.6 2024 12.5 4.3 7.9 2025 8.5 2.2 6.4 2026 5.9 0.7 5.4 After 2026 30.3 0.1 30.3 Total operating lease payments 91.3 23.2 67.8 Amounts representing imputed interest (7.3) (1.0) (6.3) Present value of lease payments 84.0 22.2 61.5 Less: current portion (17.1) (9.0) (8.0) Total long-term obligations under operating leases $ 66.9 $ 13.2 $ 53.5 Right-of-use assets under operating leases included in other assets on the consolidated balance sheets $ 90.7 $ 29.0 $ 46.7 Weighted-average remaining lease term (years) 7.6 3.0 9.3 Weighted-average discount rate 2.2 % 2.4 % 2.1 %
LEASES	LEASES The Evergy Companies lease office buildings, computer equipment, vehicles, rail cars, generating plant and other property and equipment, including rail cars to serve jointly-owned generating units where Evergy Kansas Central or Evergy Metro is the managing partner and is reimbursed by other joint-owners for the other owners' proportionate share of the costs. Under GAAP, a contract is or contains a lease if the contract conveys the right to control the use of identified property, plant or equipment for a period of time in exchange for consideration. The Evergy Companies assess a contract as being or containing a lease if the contract identifies property, plant and equipment, provides the lessee the right to obtain substantially all of the economic benefits from use of the property, plant and equipment and provides the lessee the right to direct the use of the property, plant and equipment. The Evergy Companies have entered into several agreements to purchase energy through renewable purchase power agreements that are accounted for as leases that commenced prior to the application of Topic 842-Leases . Due to the intermittent nature of renewable generation, these leases have significant variable lease payments not included in the initial and subsequent measurement of the lease liability. Variable lease payments are expensed as incurred. In addition, certain other contracts contain payment for activity that transfers a separate good or service such as utilities or common area maintenance. The Evergy Companies have elected a practical expedient permitted by GAAP to not separate such components of the lease from other lease components for all leases. The Evergy, Evergy Kansas Central and Evergy Metro leases have remaining terms ranging from 1 to 17 years, 1 to 17 years and 1 to 11 years, respectively. Leases that have original lease terms of twelve months or less are not recognized on the Evergy Companies’ balance sheets. Some leases have options to renew the lease or terminate early at the election of the Evergy Companies. Judgment is applied at lease commencement to determine the reasonably certain lease term based on then-current assumptions about use of the leased asset, market conditions and terms in the contract. The judgment applied to determine the lease term can significantly impact the measurement of the lease liability and right-of-use asset and lease classification. The Evergy Companies typically discount lease payments over the term of the lease using their incremental borrowing rates at lease commencement to measure its initial and subsequent lease liability. For leases that existed at the initial application of Topic 842, the Evergy Companies used the incremental borrowing rates that corresponded to the remaining lease term as of January 1, 2019. Leases may be classified as either operating leases or finance leases. The lease classification is based on assumptions of the lease term and discount rate, as discussed above, and the fair market value and economic life of the leased asset. Operating leases recognize a consistent expense each period over the lease term, while finance leases will result in the separate presentation of interest expense on the lease liability and amortization of the right-of-use asset. Finance leases are treated as operating leases for rate-making purposes and as such, the Evergy Companies defer to a regulatory asset or liability any material differences between expense recognition and the timing of payments in order to match what is being recovered in customer rates. The Evergy Companies’ lease expense is detailed in the following table. Evergy 2021 2020 2019 Finance lease costs (millions) Amortization of right-of-use assets $ 5.1 $ 7.7 $ 5.2 Interest on lease liabilities 2.5 3.1 2.9 Operating lease costs 21.8 22.9 23.8 Short-term lease costs 5.9 2.1 4.0 Variable lease costs for renewable purchase power agreements 280.3 296.6 313.0 Total lease costs $ 315.6 $ 332.4 $ 348.9 Evergy Kansas Central 2021 2020 2019 Finance lease costs (millions) Amortization of right-of-use assets $ 4.5 $ 7.2 $ 5.0 Interest on lease liabilities 2.4 2.8 2.7 Operating lease costs 12.9 11.9 13.2 Short-term lease costs 1.8 0.5 1.2 Variable lease costs for renewable purchase power agreements 145.8 135.6 130.8 Total lease costs $ 167.4 $ 158.0 $ 152.9 Evergy Metro 2021 2020 2019 Finance lease costs (millions) Amortization of right-of-use assets $ 0.4 $ 0.3 $ 0.1 Interest on lease liabilities 0.1 0.1 0.1 Operating lease costs 9.0 9.3 9.2 Short-term lease costs 3.0 1.5 2.6 Variable lease costs for renewable purchase power agreements 101.0 112.2 129.2 Total lease costs $ 113.5 $ 123.4 $ 141.2 Supplemental cash flow information related to the Evergy Companies' leases is detailed in the following table. Evergy 2021 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: (millions) Operating cash flows from operating leases $ 20.7 $ 22.2 $ 21.7 Operating cash flows from finance leases 2.6 2.8 2.8 Financing cash flows from finance leases 5.3 5.6 5.0 Right-of-use assets obtained in exchange for new operating lease liabilities 16.4 6.9 10.4 Right-of-use assets obtained in exchange for new finance lease liabilities 1.4 5.6 8.3 Evergy Kansas Central 2021 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: (millions) Operating cash flows from operating leases $ 11.8 $ 12.9 $ 13.7 Operating cash flows from finance leases 2.4 2.5 2.6 Financing cash flows from finance leases 4.7 5.1 4.8 Right-of-use assets obtained in exchange for new operating lease liabilities 7.1 6.6 6.1 Right-of-use assets obtained in exchange for new finance lease liabilities 1.4 4.0 8.3 Evergy Metro 2021 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: (millions) Operating cash flows from operating leases $ 10.4 $ 10.8 $ 9.9 Operating cash flows from finance leases 0.1 0.1 0.1 Financing cash flows from finance leases 0.5 0.4 0.1 Right-of-use assets obtained in exchange for new operating lease liabilities 9.3 0.3 2.4 Right-of-use assets obtained in exchange for new finance lease liabilities — 1.6 — Finance Leases Right-of-use assets for finance leases are included in property, plant and equipment on the Evergy Companies’ balance sheets. Lease liabilities for finance leases are included in other current and other long-term liabilities. Payments and other supplemental information for finance leases as of December 31, 2021, are detailed in the following table. Evergy Evergy Kansas Central Evergy Metro (millions) 2022 $ 7.8 $ 7.1 $ 0.6 2023 6.7 5.9 0.6 2024 5.5 4.7 0.6 2025 4.7 4.2 0.3 2026 4.4 3.9 0.2 After 2026 38.5 37.8 0.3 Total finance lease payments 67.6 63.6 2.6 Amounts representing imputed interest (21.3) (20.6) (0.4) Present value of lease payments 46.3 43.0 2.2 Less: current portion (5.4) (4.9) (0.5) Total long-term obligations under finance leases $ 40.9 $ 38.1 $ 1.7 Right-of-use assets under finance leases included in property, plant and equipment, net on the consolidated balance sheets $ 310.3 $ 50.6 $ 2.2 Weighted-average remaining lease term (years) 13.3 13.9 5.0 Weighted-average discount rate 5.6 % 5.6 % 5.1 % Operating Leases Right-of-use assets for operating leases are included in other long-term assets on the Evergy Companies’ balance sheets. Lease liabilities for operating leases are included in other current and other long-term liabilities. Lease payments and other supplemental information for operating leases as of December 31, 2021, are detailed in the following table. Evergy Evergy Kansas Central Evergy Metro (millions) 2022 $ 18.8 $ 9.4 $ 9.2 2023 15.3 6.5 8.6 2024 12.5 4.3 7.9 2025 8.5 2.2 6.4 2026 5.9 0.7 5.4 After 2026 30.3 0.1 30.3 Total operating lease payments 91.3 23.2 67.8 Amounts representing imputed interest (7.3) (1.0) (6.3) Present value of lease payments 84.0 22.2 61.5 Less: current portion (17.1) (9.0) (8.0) Total long-term obligations under operating leases $ 66.9 $ 13.2 $ 53.5 Right-of-use assets under operating leases included in other assets on the consolidated balance sheets $ 90.7 $ 29.0 $ 46.7 Weighted-average remaining lease term (years) 7.6 3.0 9.3 Weighted-average discount rate 2.2 % 2.4 % 2.1 %

Schedule I Financial Statements

Schedule I Financial Statements of Parent Company	12 Months Ended
	Dec. 31, 2021
Condensed Financial Information Disclosure [Abstract]
Condensed Financial Information of Parent Company Only Disclosure	EVERGY, INC. Statements of Comprehensive Income of Parent Company 2021 2020 2019 OPERATING EXPENSES: (millions) Operating and maintenance $ 13.2 $ 39.3 $ 19.4 Total Operating Expenses 13.2 39.3 19.4 INCOME FROM OPERATIONS (13.2) (39.3) (19.4) OTHER INCOME (EXPENSE) Equity in earnings from subsidiaries 932.9 683.4 698.2 Investment earnings 19.2 32.1 32.7 Other expense (8.3) (0.1) (0.1) Total Other Income, Net 943.8 715.4 730.8 Interest expense 74.3 86.3 60.7 INCOME BEFORE INCOME TAXES 856.3 589.8 650.7 Income tax benefit (16.5) (22.7) (13.7) NET INCOME $ 872.8 $ 612.5 $ 664.4 COMPREHENSIVE INCOME NET INCOME $ 872.8 $ 612.5 $ 664.4 OTHER COMPREHENSIVE INCOME Derivative hedging activity Loss on derivative hedging instruments — — (64.4) Income tax benefit — — 16.5 Net loss on derivative hedging instruments — — (47.9) Reclassification to expenses, net of taxes 5.5 3.0 1.5 Derivative hedging activity, net of tax 5.5 3.0 (46.4) Other comprehensive loss from subsidiaries, net (0.1) (2.4) (0.6) Total other comprehensive income (loss) 5.4 0.6 (47.0) COMPREHENSIVE INCOME $ 878.2 $ 613.1 $ 617.4 The accompanying Notes to Financial Statements of Parent Company are an integral part of these statements. EVERGY, INC. Balance Sheets of Parent Company December 31 2021 2020 ASSETS (millions, except share amounts) CURRENT ASSETS: Cash and cash equivalents $ 7.5 $ 11.0 Accounts receivable from subsidiaries 72.2 54.1 Notes receivable from subsidiaries 289.5 349.4 Income taxes receivable 14.8 7.4 Prepaid expenses and other assets 2.0 1.9 Total Current Assets 386.0 423.8 OTHER ASSETS: Investment in subsidiaries 10,992.1 10,349.2 Note receivable from subsidiaries — 287.5 Deferred income taxes 19.0 20.5 Other 1.2 0.5 Total Other Assets 11,012.3 10,657.7 TOTAL ASSETS $ 11,398.3 $ 11,081.5 LIABILITIES AND EQUITY CURRENT LIABILITIES: Current maturities of long-term debt $ 287.5 $ 350.0 Notes payable and commercial paper 358.0 200.0 Accounts payable to subsidiaries 22.3 18.4 Accrued interest 12.4 13.9 Other 8.1 11.0 Total Current Liabilities 688.3 593.3 LONG-TERM LIABILITIES: Long-term debt, net 1,590.1 1,875.7 Other 14.9 11.7 Total Long-Term Liabilities 1,605.0 1,887.4 Commitments and Contingencies (Note 14) EQUITY: Evergy, Inc. Shareholders' Equity: Common stock - 600,000,000 shares authorized, without par value, 229,299,900 and 226,836,670 shares issued 7,188.7 7,063.2 Retained earnings 1,960.3 1,587.0 Accumulated other comprehensive loss (44.0) (49.4) Total Shareholders' Equity 9,105.0 8,600.8 TOTAL LIABILITIES AND EQUITY $ 11,398.3 11,081.5 The accompanying Notes to Financial Statements of Parent Company are an integral part of these statements. EVERGY, INC. Statements of Cash Flows of Parent Company 2021 2020 2019 CASH FLOWS FROM (USED IN) OPERATING ACTIVITIES: (millions) Net income $ 872.8 $ 612.5 $ 664.4 Adjustments to reconcile income to net cash from operating activities: Non-cash compensation 15.6 16.0 16.3 Net deferred income taxes and credits — 9.6 21.4 Equity in earnings from subsidiaries (932.9) (683.4) (698.2) Other 7.0 7.0 2.1 Changes in working capital items: Accounts receivable from subsidiaries (18.2) (30.0) 8.9 Income taxes receivable (7.5) 0.6 (7.8) Prepaid expenses and other current assets — 0.8 (0.1) Accounts payable to subsidiaries 3.9 5.0 (15.0) Accrued interest (1.4) (0.7) 12.5 Other current liabilities (3.2) 2.9 1.7 Cash dividends from subsidiaries 290.0 355.0 460.0 Changes in other assets 0.1 0.3 0.2 Changes in other liabilities 4.8 (3.7) (3.5) Cash Flows from Operating Activities 231.0 291.9 462.9 CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES: Repayment of intercompany note 347.4 — — Cash Flows from Investing Activities 347.4 — — CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES: Short term debt, net 157.1 180.0 20.0 Proceeds from long-term debt — — 1,585.0 Retirements of long-term debt (350.0) — — Payment for settlement of interest rate swap accounted for as a cash flow hedge — — (69.8) Cash dividends paid (497.9) (465.0) (462.5) Issuance of common stock 112.5 — — Repurchase of common stock — — (1,628.7) Other financing activities (3.6) (7.5) (2.4) Cash Flows used in Financing Activities (581.9) (292.5) (558.4) NET CHANGE IN CASH AND CASH EQUIVALENTS (3.5) (0.6) (95.5) CASH AND CASH EQUIVALENTS: Beginning of period 11.0 11.6 107.1 End of period $ 7.5 $ 11.0 $ 11.6 The accompanying Notes to Financial Statements of Parent Company are an integral part of these statements. 1. ORGANIZATION AND BASIS OF PRESENTATION The Evergy, Inc. Parent Company Financial Statements have been prepared to comply with Rule 12-04 of Regulation S-X. Evergy, Inc. was incorporated in 2017 as Monarch Energy, a wholly-owned subsidiary of Great Plains Energy. Prior to the closing of the merger transactions, Monarch Energy changed its name to Evergy, Inc. and did not conduct any business activities other than those required for its formation and matters contemplated by the Amended Merger Agreement. On June 4, 2018, in accordance with the Amended Merger Agreement, Great Plains Energy merged into Evergy, Inc., with Evergy, Inc. surviving the merger and King Energy merged into Evergy Kansas Central, with Evergy Kansas Central surviving the merger. These merger transactions resulted in Evergy, Inc. becoming the parent entity of Evergy Kansas Central and the direct subsidiaries of Great Plains Energy, including Evergy Metro and Evergy Missouri West. Evergy, Inc. operates primarily through its wholly-owned direct subsidiaries. Evergy, Inc.'s investments in subsidiaries are accounted for using the equity method. Fair value adjustments and goodwill related to the acquired assets and liabilities of Great Plains Energy and its direct subsidiaries are only reflected on Evergy's consolidated financial statements and as such, are not included in Evergy, Inc.'s Parent Company Financial Statements. See Note 1 to the consolidated financial statement for additional information. 2. LONG-TERM DEBT See Note 12 to the consolidated financial statements for additional information on Evergy, Inc.'s long-term debt. 3. GUARANTEES See Note 15 to the consolidated financial statements for additional information regarding Evergy, Inc.'s guarantees. 4. DIVIDENDS Cash dividends paid to Evergy, Inc. by its subsidiaries were $290.0 million for the year ended December 31, 2021, $355.0 million for the year ended December 31, 2020 and $460.0 million for the year ended December 31, 2019. See Note 17 to the consolidated financial statements for information regarding the dividend restrictions of Evergy, Inc. and its subsidiaries.

Schedule II Valuation and Quali

Schedule II Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2021
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Schedule II Valuation and Qualifying Accounts	Evergy, Inc. Valuation and Qualifying Accounts Years Ended December 31, 2021, 2020 and 2019 Additions Charged Balance At To Costs Charged Balance Beginning And To Other At End Description Of Period Expenses Accounts Deductions Of Period Year Ended December 31, 2021 (millions) Allowance for uncollectible accounts $ 19.3 $ 28.0 $ 12.0 (a) $ 26.4 (b) $ 32.9 Tax valuation allowance 14.4 — — 1.6 (c) 12.8 Year Ended December 31, 2020 Allowance for uncollectible accounts $ 10.5 $ 24.9 $ 12.5 (a) $ 28.6 (b) $ 19.3 Tax valuation allowance 17.5 — — 3.1 (c) 14.4 Year Ended December 31, 2019 Allowance for uncollectible accounts $ 9.2 $ 27.2 $ 12.4 (e) $ 38.3 (b) $ 10.5 Tax valuation allowance 27.3 0.6 — (d) 10.4 (c) 17.5 (a) Recoveries. (b) Uncollectible accounts charged off. (c) Reversal of tax valuation allowance. Evergy Kansas Central, Inc. Valuation and Qualifying Accounts Years Ended December 31, 2021, 2020 and 2019 Additions Charged Balance At To Costs Charged Balance Beginning And To Other At End Description Of Period Expenses Accounts Deductions Of Period Year Ended December 31, 2021 (millions) Allowance for uncollectible accounts $ 7.5 $ 12.0 $ 4.5 (a) $ 11.0 (b) $ 13.0 Year Ended December 31, 2020 Allowance for uncollectible accounts $ 3.8 $ 11.1 $ 2.6 (a) $ 10.0 (b) $ 7.5 Year Ended December 31, 2019 Allowance for uncollectible accounts $ 3.9 $ 7.2 $ 3.4 (a) $ 10.7 (b) $ 3.8 Tax valuation allowance 1.7 — — 1.7 (c) — (a) Recoveries. (b) Uncollectible accounts charged off. (c) Reversal of tax valuation allowance. Evergy Metro, Inc. Valuation and Qualifying Accounts Years Ended December 31, 2021, 2020 and 2019 Additions Charged Balance At To Costs Charged Balance Beginning And To Other At End Description Of Period Expenses Accounts Deductions Of Period Year Ended December 31, 2021 (millions) Allowance for uncollectible accounts $ 8.1 $ 10.5 $ 5.3 (a) $ 10.6 (b) $ 13.3 Year Ended December 31, 2020 Allowance for uncollectible accounts $ 4.6 $ 9.0 $ 6.9 (a) $ 12.4 (b) $ 8.1 Year Ended December 31, 2019 Allowance for uncollectible accounts $ 3.8 $ 13.7 $ 6.3 (a) $ 19.2 (b) $ 4.6 (a) Recoveries. (b) Uncollectible accounts charged off.

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation Each of Evergy's, Evergy Kansas Central's and Evergy Metro's consolidated financial statements includes the accounts of their subsidiaries and variable interest entities (VIEs) of which they are the primary beneficiary. Undivided interests in jointly-owned generation facilities are included on a proportionate basis. Intercompany transactions have been eliminated. The Evergy Companies assess financial performance and allocate resources on a consolidated basis (i.e., operate in one segment).
Use of Estimates	Use of Estimates The process of preparing financial statements in conformity with generally accepted accounting principles (GAAP) requires the use of estimates and assumptions that affect the reported amounts of certain types of assets, liabilities, revenues and expenses. Such estimates primarily relate to unsettled transactions and events as of the date of the financial statements. Accordingly, upon settlement, actual results may differ from estimated amounts.
Cash and Cash Equivalents	Cash and Cash EquivalentsCash equivalents consist of highly liquid investments with original maturities of three months or less at acquisition.
Fuel Inventory and Supplies	Fuel Inventory and SuppliesThe Evergy Companies record fuel inventory and supplies at average cost.
Property, Plant and Equipment	Property, Plant and Equipment The Evergy Companies record the value of property, plant and equipment, including that of VIEs, at cost. For plant, cost includes contracted services, direct labor and materials, indirect charges for engineering and supervision and an allowance for funds used during construction (AFUDC). AFUDC represents the allowed cost of capital used to finance utility construction activity. AFUDC equity funds are included as a non-cash item in other income and AFUDC borrowed funds are a reduction of interest expense. AFUDC is computed by applying a composite rate to qualified construction work in progress. The rates used to compute gross AFUDC are compounded semi-annually.
Depreciation and Amortization	Depreciation and AmortizationDepreciation and amortization of utility plant other than nuclear fuel is computed using the straight-line method over the estimated lives of depreciable property based on rates approved by state regulatory authorities. Annual depreciation rates average approximately 3%. See Note 7 for more details. Nuclear fuel is amortized to fuel expense based on the quantity of heat produced during the generation of electricity.
Plant to be Retired, Net	Plant to be Retired, Net When the Evergy Companies retire utility plant, the original cost, net of salvage, is charged to accumulated depreciation. However, when it becomes probable an asset will be retired significantly in advance of its original expected useful life and in the near term, the cost of the asset and related accumulated depreciation is recognized as a separate asset and a probable abandonment. If the asset is still in service, the net amount is classified as plant to be retired, net on the consolidated balance sheets. If the asset is no longer in service, the net amount is classified as a regulatory asset on the consolidated balance sheets. The Evergy Companies must also assess the probability of full recovery of the remaining net book value of the abandonment. The net book value that may be retained as an asset on the balance sheet for the abandonment is dependent upon amounts that may be recovered through regulated rates, including any return. An impairment charge, if any, would equal the difference between the remaining net book value of the asset and the present value of the future revenues expected from the asset. Evergy Missouri West has determined that its November 2018 retirement of Sibley No. 3 Unit meets the criteria to be considered an abandonment. As of December 31, 2021, Evergy has classified the remaining Sibley No. 3 Unit net book value of $123.4 million as retired generation facilities within regulatory assets on its consolidated balance sheet. This regulatory asset is reduced by approximately $9 million of annual amortization expense, which is an amount equal to the annual depreciation expense for the asset reflected in retail rates. In October 2019, the Missouri Public Service Commission (MPSC) granted the request of certain intervenors for an Accounting Authority Order (AAO) that requires Evergy Missouri West to record a regulatory liability for all revenues collected from customers for return on investment, non-fuel operations and maintenance costs, taxes including accumulated deferred income taxes and all other costs associated with Sibley Station following the station's retirement in November 2018 for consideration in Evergy Missouri West's current rate case, which was filed in January 2022. See Note 4 for additional information regarding the AAO and Evergy Missouri West's current rate case. Evergy Missouri West expects that the MPSC's decision in its current rate case regarding the AAO could impact the valuation of its regulatory asset for retired generation facilities but as of December 31, 2021, has concluded that no impairment is required based on the relevant facts and circumstances.
Nuclear Plant Decommissioning Costs	Nuclear Plant Decommissioning Costs Nuclear plant decommissioning cost estimates are based on either the immediate dismantlement method or the deferred dismantling method as determined by the State Corporation Commission of the State of Kansas (KCC) and MPSC and include the costs of decontamination, dismantlement and site restoration. Based on these cost estimates, Evergy Kansas Central and Evergy Metro each contribute to a tax-qualified trust fund to be used to decommission Wolf Creek. Related liabilities for decommissioning are included on Evergy's, Evergy Kansas Central's and Evergy Metro's consolidated balance sheets in asset retirement obligations (AROs).
Regulatory Accounting	Regulatory AccountingAccounting standards are applied that recognize the economic effects of rate regulation. Accordingly, regulatory assets and liabilities have been recorded when required by a regulatory order or based on regulatory precedent.
Cash Surrender Value of Life Insurance	Cash Surrender Value of Life Insurance Amounts related to corporate-owned life insurance (COLI) are recorded on the consolidated balance sheets in other long-term assets and are detailed in the following table for Evergy. Substantially all of Evergy's COLI-related balances relate to Evergy Kansas Central's COLI activity.
Fair Value of Financial Instruments	Fair Value of Financial Instruments The following methods and assumptions were used to estimate the fair value of the following financial instruments for which it was practicable to estimate that value. Nuclear decommissioning trust fund - The Evergy Companies' nuclear decommissioning trust fund assets are recorded at fair value based on quoted market prices of the investments held by the fund and/or valuation models. Pension plans - For financial reporting purposes, the market value of plan assets is the fair value based on quoted market prices of the investments held by the fund and/or valuation models.
Revenue Recognition	Revenue Recognition The Evergy Companies recognize revenue on the sale of electricity to customers over time as the service is provided in the amount they have the right to invoice. Revenues recorded include electric services provided but not yet billed by the Evergy Companies. Unbilled revenues are recorded for kWh usage in the period following the customers' billing cycle to the end of the month. This estimate is based on net system kWh usage less actual billed kWhs. The Evergy Companies' estimated unbilled kWhs are allocated and priced by regulatory jurisdiction across the rate classes based on actual billing rates. The Evergy Companies' unbilled revenue estimate is affected by factors including fluctuations in energy demand, weather, line losses and changes in the composition of customer classes. See Note 3 for the balance of unbilled receivables for each of Evergy, Evergy Kansas Central and Evergy Metro as of December 31, 2021 and 2020. The Evergy Companies also collect sales taxes and franchise fees from customers concurrent with revenue-producing activities that are levied by state and local governments. These items are excluded from revenue, and thus are not reflected on the consolidated statements of income and comprehensive income for Evergy, Evergy Kansas Central and Evergy Metro.
Allowance for Credit Losses	Allowance for Credit Losses Historical loss information generally provides the basis for the Evergy Companies' assessment of expected credit losses. The Evergy Companies use an aging of accounts receivable method to assess historical loss information. When historical experience may not fully reflect the Evergy Companies' expectations about the future, the Evergy Companies will adjust historical loss information, as necessary, to reflect the current conditions and reasonable and supportable forecasts not already reflected in the historical loss information.
Asset Impairments	Asset Impairments Long-lived assets and finite-lived intangible assets subject to amortization are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. If the sum of the undiscounted expected future cash flows from an asset to be held and used is less than the carrying value of the asset, an asset impairment must be recognized in the financial statements. The amount of impairment recognized is the excess of the carrying value of the asset over its fair value.
Income Taxes	Income Taxes Income taxes are accounted for using the asset/liability approach. Deferred tax assets and liabilities are determined based on the temporary differences between the financial reporting and tax bases of assets and liabilities, applying enacted statutory tax rates in effect for the year in which the differences are expected to reverse. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion of the deferred tax assets will not be realized. The Evergy Companies recognize tax benefits based on a "more-likely-than-not" recognition threshold. In addition, the Evergy Companies recognize interest accrued related to unrecognized tax benefits in interest expense and penalties in operating expenses. Evergy files a consolidated federal income tax return as well as unitary and combined income tax returns in several state jurisdictions with Kansas and Missouri being the most significant. Income taxes for consolidated or combined subsidiaries are allocated to the subsidiaries based on separate company computations of income or loss. Evergy Kansas Central's and Evergy Metro's income tax provisions include taxes allocated based on their separate company's income or loss. The Evergy Companies have established a net regulatory liability for future refunds to be made to customers for amounts collected from customers in excess of income taxes in current rates. Tax credits are recognized in the year generated except for certain Evergy Kansas Central, Evergy Metro and Evergy Missouri West investment tax credits that have been deferred and amortized over the remaining service lives of the related properties.
Earnings Per Share	Earnings Per ShareTo compute basic earnings per share (EPS), Evergy divides net income attributable to Evergy, Inc. by the weighted average number of common shares outstanding. Diluted EPS includes the effect of issuable common shares resulting from restricted share units (RSUs), restricted stock and a warrant. Evergy computes the dilutive effects of potential issuances of common shares using the treasury stock method or the contingently issuable share method, as applicable.

SUMMARY OF SIGNIFICANT ACCOUN_3

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Schedule of Fuel Inventory and Supplies	The following table separately states the balances for fuel inventory and supplies. December 31 2021 2020 Evergy (millions) Fuel inventory $ 160.9 $ 145.0 Supplies 405.8 359.5 Fuel inventory and supplies $ 566.7 $ 504.5 Evergy Kansas Central Fuel inventory $ 74.3 $ 79.3 Supplies 208.9 197.1 Fuel inventory and supplies $ 283.2 $ 276.4 Evergy Metro Fuel inventory $ 62.0 $ 44.9 Supplies 149.0 125.5 Fuel inventory and supplies $ 211.0 $ 170.4
Schedule of Allowance for Funds used During Construction	The amounts of the Evergy Companies' AFUDC for borrowed and equity funds are detailed in the following table. 2021 2020 2019 Evergy (millions) AFUDC borrowed funds $ 14.7 $ 16.5 $ 14.5 AFUDC equity funds 29.4 17.2 2.2 Total $ 44.1 $ 33.7 $ 16.7 Evergy Kansas Central AFUDC borrowed funds $ 7.1 $ 8.5 $ 7.5 AFUDC equity funds 14.9 9.1 — Total $ 22.0 $ 17.6 $ 7.5 Evergy Metro AFUDC borrowed funds $ 6.0 $ 6.0 $ 4.3 AFUDC equity funds 12.6 8.0 2.2 Total $ 18.6 $ 14.0 $ 6.5 The average rates used in the calculation of AFUDC are detailed in the following table. 2021 2020 2019 Evergy Kansas Central 4.9% 4.7% 3.0% Evergy Metro 5.6% 5.2% 4.6% Evergy Missouri West 2.6% 3.5% 3.7%
Schedule pf Depreciable Lives of Property Plant and Equipment	The depreciable lives of Evergy's, Evergy Kansas Central's and Evergy Metro's property, plant and equipment are detailed in the following table. Evergy Evergy Kansas Central Evergy Metro (years) Generating facilities 8 to 87 8 to 87 20 to 60 Transmission facilities 15 to 94 36 to 94 15 to 70 Distribution facilities 8 to 73 19 to 73 8 to 55 Other 5 to 84 7 to 84 5 to 50
Schedule of Cash Surrender Value of Corporate Owned Life Insurance	Substantially all of Evergy's COLI-related balances relate to Evergy Kansas Central's COLI activity. December 31 2021 2020 Evergy (millions) Cash surrender value of policies $ 1,363.0 $ 1,369.6 Borrowings against policies (1,232.3) (1,237.6) Corporate-owned life insurance, net $ 130.7 $ 132.0
Schedule of Other Income Expense	The table below shows the detail of other expense for each of the Evergy Companies. 2021 2020 2019 Evergy (millions) Non-service cost component of net benefit cost $ (55.6) $ (58.6) $ (55.6) Other (31.8) (19.6) (21.3) Other expense $ (87.4) $ (78.2) $ (76.9) Evergy Kansas Central Non-service cost component of net benefit cost $ (15.6) $ (21.2) $ (20.1) Other (20.3) (17.7) (20.0) Other expense $ (35.9) $ (38.9) $ (40.1) Evergy Metro Non-service cost component of net benefit cost $ (26.7) $ (24.2) $ (20.9) Other (2.7) (1.3) (0.5) Other expense $ (29.4) $ (25.5) $ (21.4)
Schedule of Earnings Per Share, Basic and Diluted	The following table reconciles Evergy's basic and diluted EPS. 2021 2020 2019 Income (millions, except per share amounts) Net income $ 891.9 $ 630.0 $ 685.6 Less: Net income attributable to noncontrolling interests 12.2 11.7 15.7 Net income attributable to Evergy, Inc. $ 879.7 $ 618.3 $ 669.9 Common Shares Outstanding Weighted average number of common shares outstanding - basic 229.0 227.2 239.5 Add: effect of dilutive securities 0.6 0.3 0.4 Diluted average number of common shares outstanding 229.6 227.5 239.9 Basic EPS $ 3.84 $ 2.72 $ 2.80 Diluted EPS $ 3.83 $ 2.72 $ 2.79
Supplemental Cash Flow Information	Supplemental Cash Flow Information Year Ended December 31 2021 2020 2019 Evergy (millions) Cash paid for (received from): Interest, net of amount capitalized $ 356.9 $ 367.6 $ 329.5 Interest of VIEs 0.2 0.8 1.6 Income taxes, net of refunds (19.6) (46.5) (5.2) Non-cash investing transactions: Property, plant and equipment additions 269.3 463.3 186.0 Non-cash financing transactions: Issuance of stock for compensation and reinvested dividends 0.7 0.9 (0.3) Year Ended December 31 2021 2020 2019 Evergy Kansas Central (millions) Cash paid for (received from): Interest, net of amount capitalized $ 149.3 $ 157.5 $ 143.0 Interest of VIEs 0.2 0.8 1.6 Income taxes, net of refunds 37.5 4.7 29.9 Non-cash investing transactions: Property, plant and equipment additions 101.9 235.4 92.1 Year Ended December 31 2021 2020 2019 Evergy Metro (millions) Cash paid for (received from): Interest, net of amount capitalized $ 110.8 $ 109.9 $ 118.4 Income taxes, net of refunds 36.6 4.8 77.0 Non-cash investing transactions: Property, plant and equipment additions 102.2 192.5 80.7

REVENUE (Tables)

REVENUE (Tables)	12 Months Ended
	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	Evergy's, Evergy Kansas Central's and Evergy Metro's revenues disaggregated by customer class are summarized in the following tables. Evergy 2021 2020 2019 Revenues (millions) Residential $ 1,918.3 $ 1,909.2 $ 1,908.1 Commercial 1,681.3 1,641.7 1,781.6 Industrial 597.0 588.7 621.6 Other retail 33.1 38.5 47.1 Total electric retail $ 4,229.7 $ 4,178.1 $ 4,358.4 Wholesale 717.2 264.0 327.5 Transmission 356.8 318.5 309.2 Industrial steam and other 25.4 21.0 24.5 Total revenue from contracts with customers $ 5,329.1 $ 4,781.6 $ 5,019.6 Other 257.6 131.8 128.2 Operating revenues $ 5,586.7 $ 4,913.4 $ 5,147.8 Evergy Kansas Central 2021 2020 2019 Revenues (millions) Residential $ 824.1 $ 801.2 $ 793.9 Commercial 694.1 665.6 709.1 Industrial 391.7 379.9 401.3 Other retail 17.1 17.7 21.0 Total electric retail $ 1,927.0 $ 1,864.4 $ 1,925.3 Wholesale 453.1 215.4 239.9 Transmission 322.9 287.3 273.3 Other 2.2 2.3 5.8 Total revenue from contracts with customers $ 2,705.2 $ 2,369.4 $ 2,444.3 Other 142.1 48.7 63.1 Operating revenues $ 2,847.3 $ 2,418.1 $ 2,507.4 Evergy Metro 2021 2020 2019 Revenues (millions) Residential $ 691.9 $ 714.7 $ 712.4 Commercial 713.3 717.1 786.1 Industrial 122.0 128.8 136.9 Other retail 9.2 11.7 16.3 Total electric retail $ 1,536.4 $ 1,572.3 $ 1,651.7 Wholesale 242.6 35.0 70.9 Transmission 17.1 13.9 17.5 Other 3.6 2.6 2.8 Total revenue from contracts with customers $ 1,799.7 $ 1,623.8 $ 1,742.9 Other 114.0 81.8 63.6 Operating revenues $ 1,913.7 $ 1,705.6 $ 1,806.5

RECEIVABLES (Tables)

RECEIVABLES (Tables)	12 Months Ended
	Dec. 31, 2021
Receivables [Abstract]
Schedule of Receivables	The Evergy Companies' receivables are detailed in the following table. December 31 2021 2020 Evergy (millions) Customer accounts receivable - billed $ 13.7 $ 5.3 Customer accounts receivable - unbilled 80.1 110.0 Other receivables 160.7 177.9 Allowance for credit losses (32.9) (19.3) Total $ 221.6 $ 273.9 Evergy Kansas Central Customer accounts receivable - billed $ 9.7 $ — Customer accounts receivable - unbilled 26.4 50.7 Other receivables 178.5 175.7 Allowance for credit losses (13.0) (7.5) Total $ 201.6 $ 218.9 Evergy Metro Customer accounts receivable - billed $ 2.7 $ 3.3 Customer accounts receivable - unbilled 25.9 27.9 Other receivables 15.7 21.9 Allowance for credit losses (13.3) (8.1) Total $ 31.0 $ 45.0 December 31 2021 2020 (millions) Evergy $ 63.7 $ 57.5 Evergy Kansas Central 62.6 49.9 Evergy Metro 0.5 6.9 December 31 2021 2020 (millions) Evergy $ 319.0 $ 360.0 Evergy Kansas Central 153.0 180.0 Evergy Metro 116.0 130.0
Summary of Bad Debt Expense	The change in the Evergy Companies' allowance for credit losses is summarized in the following table. 2021 2020 Evergy (millions) Beginning balance January 1 $ 19.3 $ 10.5 Credit loss expense 28.0 24.9 Write-offs (26.4) (28.6) Recoveries of prior write-offs 12.0 12.5 Ending balance December 31 $ 32.9 $ 19.3 Evergy Kansas Central Beginning balance January 1 $ 7.5 $ 3.8 Credit loss expense 12.0 11.1 Write-offs (11.0) (10.0) Recoveries of prior write-offs 4.5 2.6 Ending balance December 31 $ 13.0 $ 7.5 Evergy Metro Beginning balance January 1 $ 8.1 $ 4.6 Credit loss expense 10.5 9.0 Write-offs (10.6) (12.4) Recoveries of prior write-offs 5.3 6.9 Ending balance December 31 $ 13.3 $ 8.1

RATE MATTERS AND REGULATION (Ta

RATE MATTERS AND REGULATION (Tables)	12 Months Ended
	Dec. 31, 2021
Regulated Operations [Abstract]
Schedule of Regulatory Assets	The Evergy Companies' regulatory assets and liabilities are detailed in the following tables. December 31 2021 2020 Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Regulatory Assets (millions) Pension and post-retirement costs $ 567.2 $ 265.6 $ 213.3 $ 867.8 $ 412.9 $ 359.9 Debt reacquisition costs 94.4 86.7 6.7 98.9 91.3 6.8 Debt fair value adjustment 96.5 — — 104.0 — — Asset retirement obligations fair value 117.9 — — 116.2 — — Depreciation 98.5 50.1 27.0 70.0 52.7 9.4 Cost of removal 257.5 141.0 90.2 183.4 125.7 57.7 Asset retirement obligations 119.3 52.3 49.1 170.8 55.0 84.0 Analog meter unrecovered investment 18.4 18.4 — 24.1 24.1 — Treasury yield hedges 20.4 20.4 — 21.5 21.5 — Iatan No. 1 and common facilities 6.5 — 2.7 6.9 — 2.8 Iatan No. 2 construction accounting costs 24.7 — 12.4 25.4 — 12.7 Kansas property tax surcharge 39.6 31.6 8.0 28.9 23.7 5.2 Disallowed plant costs 14.2 14.2 — 14.5 14.5 — La Cygne environmental costs 11.2 9.0 2.2 12.4 10.1 2.3 Deferred customer programs 18.7 6.4 7.8 16.3 5.7 8.6 Fuel recovery mechanisms 202.5 120.8 19.8 26.2 1.2 17.7 February 2021 winter weather event 403.1 121.5 — — — — Solar rebates 20.2 — — 25.9 — 1.5 Wolf Creek outage 20.4 10.2 10.2 10.0 5.0 5.0 Pension and other post-retirement benefit 65.6 23.0 29.6 49.8 12.8 23.4 Retired generation facilities 123.4 — — 128.4 — — Merger transition costs 32.7 15.6 12.1 37.6 18.0 13.9 Other regulatory assets 42.3 24.1 5.9 35.4 22.1 4.6 Total 2,415.2 1,010.9 497.0 2,074.4 896.3 615.5 Less: current portion (424.1) (257.3) (86.3) (206.2) (96.2) (82.0) Total noncurrent regulatory assets $ 1,991.1 $ 753.6 $ 410.7 $ 1,868.2 $ 800.1 $ 533.5
Schedule of Regulatory Liabilities	December 31 2021 2020 Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Regulatory Liabilities (millions) Taxes refundable through future rates $ 1,969.5 $ 1,143.7 $ 616.1 $ 2,055.7 $ 1,184.5 $ 650.2 Deferred regulatory gain from sale 42.6 42.6 — 48.1 48.1 — Emission allowances 42.1 — 42.1 46.1 — 46.1 Nuclear decommissioning 400.1 175.7 224.4 319.7 138.2 181.5 Pension and post-retirement costs 44.4 23.2 15.9 50.8 31.4 13.1 Jurisdictional allowance for funds used 27.5 25.8 1.7 28.7 27.0 1.7 La Cygne leasehold dismantling costs 29.6 29.6 — 29.6 29.6 — Cost of removal — — — 4.4 — — Kansas tax credits 16.7 16.7 — — — — Purchase power agreement 5.8 5.8 — 6.3 6.3 — Fuel recovery mechanisms 6.5 — 6.5 1.3 — — February 2021 winter weather event 65.1 — 65.1 — — — Sibley AAO 29.3 — — 18.4 — — Other regulatory liabilities 96.5 19.1 37.0 55.8 7.8 14.8 Total 2,775.7 1,482.2 1,008.8 2,664.9 1,472.9 907.4 Less: current portion (70.7) (12.8) (54.6) (26.1) (11.9) (8.0) Total noncurrent regulatory liabilities $ 2,705.0 $ 1,469.4 $ 954.2 $ 2,638.8 $ 1,461.0 $ 899.4

ASSET RETIREMENT OBLIGATIONS (T

ASSET RETIREMENT OBLIGATIONS (Tables)	12 Months Ended
	Dec. 31, 2021
Asset Retirement Obligation Disclosure [Abstract]
Schedule of Change in Asset Retirement Obligation	The following table summarizes the change in the Evergy Companies' AROs for the periods ending December 31, 2021 and 2020. Evergy Evergy Kansas Central Evergy Metro 2021 2020 2021 2020 2021 2020 (millions) Beginning balance January 1 $ 941.9 $ 674.1 $ 427.2 $ 272.9 $ 378.9 $ 253.6 Revision in timing and/or estimates 13.5 249.3 3.8 136.8 9.5 118.4 Settlements (38.7) (18.4) (10.6) (2.2) (24.4) (7.5) Accretion 43.4 36.9 23.5 19.7 17.0 14.4 Ending balance $ 960.1 $ 941.9 $ 443.9 $ 427.2 $ 381.0 $ 378.9 Less: current portion (19.5) (40.2) (7.3) (11.2) (11.0) (21.2) Total noncurrent asset $ 940.6 $ 901.7 $ 436.6 $ 416.0 $ 370.0 $ 357.7

PROPERTY, PLANT AND EQUIPMENT (

PROPERTY, PLANT AND EQUIPMENT (Tables)	12 Months Ended
	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
Schedule of Public Utility Property, Plant, and Equipment	The following tables summarize the property, plant and equipment of Evergy, Evergy Kansas Central and Evergy Metro. December 31, 2021 Evergy Evergy Kansas Central Evergy Metro (millions) Electric plant in service $ 30,289.9 $ 14,686.3 $ 11,656.9 Electric plant acquisition adjustment 724.3 724.3 — Accumulated depreciation (11,515.5) (5,590.8) (4,733.7) Plant in service 19,498.7 9,819.8 6,923.2 Construction work in progress 1,350.6 652.2 475.3 Nuclear fuel, net 152.5 76.1 76.4 Plant to be retired, net (a) 0.8 0.8 — Net property, plant and equipment $ 21,002.6 $ 10,548.9 $ 7,474.9 December 31, 2020 Evergy Evergy Kansas Central Evergy Metro (millions) Electric plant in service $ 28,914.8 $ 14,095.1 $ 11,161.8 Electric plant acquisition adjustment 724.3 724.3 — Accumulated depreciation (10,998.4) (5,293.5) (4,532.7) Plant in service 18,640.7 9,525.9 6,629.1 Construction work in progress 1,153.5 589.1 433.9 Nuclear fuel, net 155.9 77.7 78.2 Plant to be retired, net (a) 0.9 0.9 — Net property, plant and equipment $ 19,951.0 $ 10,193.6 $ 7,141.2 (a) As of December 31, 2021 and 2020, represents the planned retirement of Evergy Kansas Central analog meters prior to the end of their remaining useful lives. The following table summarizes the property, plant and equipment of VIEs for Evergy and Evergy Kansas Central. December 31 2021 2020 (millions) Electric plant of VIEs $ 392.1 $ 392.1 Accumulated depreciation of VIEs (244.3) (237.2) Net property, plant and equipment of VIEs $ 147.8 $ 154.9 The Evergy Companies' depreciation expense is detailed in the following table. 2021 2020 2019 (millions) Evergy (a) $ 813.6 $ 804.7 $ 786.3 Evergy Kansas Central (a) 450.3 435.1 425.8 Evergy Metro 255.9 269.5 262.7 (a) Approximately $7.1 million of depreciation expense in each of 2021, 2020 and 2019 was attributable to property, plant and equipment of VIEs.

JOINTLY-OWNED ELECTRIC UTILIT_2

JOINTLY-OWNED ELECTRIC UTILITY PLANTS (Tables)	12 Months Ended
	Dec. 31, 2021
Jointly Owned Electric Utility Plants [Abstract]
Schedule of Jointly Owned Utility Plants	Evergy's, Evergy Kansas Central's and Evergy Metro's share of jointly-owned electric utility plants at December 31, 2021, are detailed in the following tables. Evergy Wolf Creek Unit La Cygne Units (a) Iatan No. 1 Unit Iatan No. 2 Unit Iatan Common Jeffrey Energy Center State Line (millions, except MW amounts) Evergy's share 94% 100% 88% 73% 79% 100% 40% Electric plant in $ 4,078.7 $ 2,219.1 $ 765.7 $ 1,405.9 $ 503.6 $ 2,521.1 $ 115.0 Accumulated depreciation 2,040.2 816.0 251.9 480.3 122.2 1,036.7 85.2 Nuclear fuel, net 152.5 — — — — — — Construction work in progress 187.4 52.6 4.4 8.1 7.4 48.7 25.5 2022 accredited 1,108 1,426 618 640 n/a 2,191 200 (a) The VIE consolidated by Evergy and Evergy Kansas Central holds its 50% leasehold interest in La Cygne Unit 2. This 50% leasehold interest in La Cygne Unit 2 is reflected in the information provided above. See Note 18 for additional information. Evergy Kansas Central Wolf Creek Unit La Cygne Units (a) Jeffrey Energy Center State (millions, except MW amounts) Evergy Kansas Central's share 47% 50% 92% 40% Electric plant in service $ 2,019.8 $ 1,047.4 $ 2,307.6 $ 115.0 Accumulated depreciation 992.2 475.2 944.5 85.2 Nuclear fuel, net 76.1 — — — Construction work in progress 83.6 29.0 44.9 25.5 2022 accredited capacity-MWs 554 713 2,016 200 (a) The VIE consolidated by Evergy and Evergy Kansas Central holds its 50% leasehold interest in La Cygne Unit 2. This 50% leasehold interest in La Cygne Unit 2 is reflected in the information provided above. See Note 18 for additional information. Evergy Metro Wolf Creek Unit La Cygne Units Iatan No. 1 Unit Iatan No. 2 Unit Iatan Common (millions, except MW amounts) Evergy Metro's share 47% 50% 70% 55% 61% Electric plant in service $ 2,058.9 $ 1,171.7 $ 594.8 $ 1,066.4 $ 399.6 Accumulated depreciation 1,048.0 340.8 205.3 412.5 103.3 Nuclear fuel, net 76.4 — — — — Construction work in progress 103.8 23.6 3.6 6.1 5.5 2022 accredited capacity-MWs 554 713 492 482 NA

PENSION PLANS AND POST-RETIRE_2

PENSION PLANS AND POST-RETIREMENT BENEFITS (Tables)	12 Months Ended
	Dec. 31, 2021
Retirement Benefits [Abstract]
Schedule of Net Funded Status	Pension Benefits Post-Retirement Benefits Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Change in projected benefit obligation (PBO) (millions) PBO at January 1, 2021 $ 2,901.1 $ 1,429.6 $ 1,446.5 $ 280.4 $ 146.8 $ 133.6 Service cost 82.6 29.1 53.5 3.3 1.7 1.6 Interest cost 84.2 41.0 42.5 7.8 4.0 3.8 Contribution by participants — — — 9.0 1.4 7.6 Actuarial gain (119.0) (50.0) (68.3) (17.2) (9.4) (7.8) Benefits paid (93.5) (54.8) (37.5) (24.9) (10.6) (14.3) Settlements (284.0) (126.2) (157.8) — — — Other (9.7) (4.3) (5.4) — — — PBO at December 31, 2021 $ 2,561.7 $ 1,264.4 $ 1,273.5 $ 258.4 $ 133.9 $ 124.5 Change in plan assets Fair value of plan assets at January 1, 2021 $ 1,799.1 $ 887.0 $ 912.1 $ 248.3 $ 125.8 $ 122.5 Actual return on plan assets 145.5 83.4 62.1 5.2 6.5 (1.3) Contributions by employer and participants 148.7 46.5 102.2 11.8 1.7 10.1 Benefits paid (89.4) (52.3) (37.1) (23.0) (10.0) (13.0) Settlements (279.5) (124.6) (154.9) — — — Other (9.7) (4.3) (5.4) — — — Fair value of plan assets at December 31, 2021 $ 1,714.7 $ 835.7 $ 879.0 $ 242.3 $ 124.0 $ 118.3 Funded status at December 31, 2021 $ (847.0) $ (428.7) $ (394.5) $ (16.1) $ (9.9) $ (6.2) Pension Benefits Post-Retirement Benefits Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Change in projected benefit obligation (PBO) (millions) PBO at January 1, 2020 $ 2,718.2 $ 1,323.4 $ 1,371.4 $ 264.3 $ 138.7 $ 125.6 Service cost 78.9 27.1 51.8 2.7 1.1 1.6 Interest cost 96.8 47.0 49.1 9.2 4.8 4.4 Contribution by participants — — — 9.3 1.8 7.5 Plan amendments 4.2 8.1 (3.9) 1.0 0.5 0.5 Actuarial loss 273.9 127.0 144.8 19.6 11.0 8.6 Benefits paid (202.5) (102.3) (99.0) (25.7) (11.1) (14.6) Settlements (62.9) — (62.9) — — — Other (5.5) (0.7) (4.8) — — — PBO at December 31, 2020 $ 2,901.1 $ 1,429.6 $ 1,446.5 $ 280.4 $ 146.8 $ 133.6 Change in plan assets Fair value of plan assets at January 1, 2020 $ 1,732.8 $ 842.1 $ 890.7 $ 239.9 $ 120.5 $ 119.4 Actual return on plan assets 209.9 99.7 110.2 20.7 13.7 7.0 Contributions by employer and participants 123.4 45.8 77.6 11.7 2.1 9.6 Benefits paid (198.6) (99.9) (98.7) (24.0) (10.5) (13.5) Settlements (62.9) — (62.9) — — — Other (5.5) (0.7) (4.8) — — — Fair value of plan assets at December 31, 2020 $ 1,799.1 $ 887.0 $ 912.1 $ 248.3 $ 125.8 $ 122.5 Funded status at December 31, 2020 $ (1,102.0) $ (542.6) $ (534.4) $ (32.1) $ (21.0) $ (11.1)
Schedule of Amounts Recognized in Balance Sheet	Pension Benefits Post-Retirement Benefits Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Amounts recognized in the consolidated balance sheets (millions) Non-current asset $ — $ — $ — $ 21.5 $ — $ 21.5 Current pension and other post-retirement liability (4.4) (2.4) (0.7) (1.1) (0.6) (0.6) Noncurrent pension liability and other post-retirement liability (842.6) (426.3) (393.8) (36.5) (9.3) (27.1) Net amount recognized before regulatory treatment (847.0) (428.7) (394.5) (16.1) (9.9) (6.2) Accumulated OCI or regulatory asset/liability 317.2 263.6 84.6 (11.4) (9.6) (10.5) Net amount recognized at December 31, 2021 $ (529.8) $ (165.1) $ (309.9) $ (27.5) $ (19.5) $ (16.7) Amounts in accumulated OCI or regulatory asset/liability not yet recognized as a component of net periodic benefit cost: Actuarial (gain) loss $ 302.4 $ 246.6 $ 86.4 $ (12.6) $ (10.5) $ (3.8) Prior service cost 14.8 17.0 (1.8) 1.2 0.9 (6.7) Net amount recognized at December 31, 2021 $ 317.2 $ 263.6 $ 84.6 $ (11.4) $ (9.6) $ (10.5) Pension Benefits Post-Retirement Benefits Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Amounts recognized in the consolidated balance sheets (millions) Non-current asset $ — $ — $ — $ 21.3 $ — $ 21.3 Current pension and other post-retirement liability (4.4) (2.5) (0.8) (1.6) (0.8) (0.9) Noncurrent pension liability and other post- (1,097.6) (540.1) (533.6) (51.8) (20.2) (31.5) Net amount recognized before regulatory treatment (1,102.0) (542.6) (534.4) (32.1) (21.0) (11.1) Accumulated OCI or regulatory asset/liability 566.9 408.0 216.9 4.0 1.0 (7.7) Net amount recognized at December 31, 2020 $ (535.1) $ (134.6) $ (317.5) $ (28.1) $ (20.0) $ (18.8) Amounts in accumulated OCI or regulatory asset/liability not yet recognized as a component of net periodic benefit cost: Actuarial (gain) loss $ 551.8 $ 388.9 $ 218.6 $ 2.2 $ (0.3) $ — Prior service cost 15.1 19.1 (1.7) 1.8 1.3 (7.7) Net amount recognized at December 31, 2020 $ 566.9 $ 408.0 $ 216.9 $ 4.0 $ 1.0 $ (7.7) Actuarial gains for the Evergy Companies' pension benefit plans for 2021 were primarily driven by an increase in the discount rate used to measure the benefit obligation as a result of higher market interest rates. See the weighted average assumptions used to determine the benefit obligations in this Note 9 for further information. Actuarial losses for the Evergy Companies' pension benefit plans for 2020 were primarily driven by a decrease in the discount rate used to measure the benefit obligation of approximately 70 basis points as a result of lower market interest rates.
Schedule of Net Benefit Costs	The assets in the aforementioned trusts are not included in the table above. See Note 13 for more information on these amounts. Pension Benefits Post-Retirement Benefits Year Ended December 31, 2021 Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Components of net periodic benefit costs (millions) Service cost $ 82.6 $ 29.1 $ 53.5 $ 3.3 $ 1.7 $ 1.6 Interest cost 84.2 41.0 42.5 7.8 4.0 3.8 Expected return on plan assets (103.5) (52.8) (55.7) (8.9) (6.3) (2.6) Prior service cost 2.0 2.1 — 0.5 0.5 (1.0) Recognized net actuarial (gain) loss 54.1 36.0 43.8 1.4 0.6 (0.1) Settlement and special termination benefits 34.3 25.6 13.7 — — — Net periodic benefit costs before regulatory adjustment and intercompany allocations 153.7 81.0 97.8 4.1 0.5 1.7 Regulatory adjustment 17.3 (13.1) 4.2 (4.8) (3.3) 0.4 Intercompany allocations n/a 3.2 (25.9) n/a — (0.4) Net periodic benefit costs (income) 171.0 71.1 76.1 (0.7) (2.8) 1.7 Other changes in plan assets and benefit obligations recognized in OCI or regulatory assets/liabilities Current year net gain (195.3) (106.3) (88.4) (13.6) (9.6) (3.9) Amortization of gain (loss) (52.4) (36.0) (43.9) (1.3) (0.5) 0.1 Amortization of prior service cost (2.0) (2.1) — (0.5) (0.5) 1.0 Total recognized in OCI or regulatory asset/liability (249.7) (144.4) (132.3) (15.4) (10.6) (2.8) Total recognized in net periodic benefit costs and OCI or regulatory asset/liability $ (78.7) $ (73.3) $ (56.2) $ (16.1) $ (13.4) $ (1.1) Pension Benefits Post-Retirement Benefits Year Ended December 31, 2020 Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Components of net periodic benefit costs (millions) Service cost $ 78.9 $ 27.1 $ 51.8 $ 2.7 $ 1.1 $ 1.6 Interest cost 96.8 47.0 49.1 9.2 4.8 4.4 Expected return on plan assets (105.6) (53.1) (54.7) (9.3) (6.6) (2.7) Prior service cost 1.8 1.6 0.8 0.5 0.5 — Recognized net actuarial loss 46.4 33.9 45.7 0.2 — (0.6) Settlement and special termination benefits 11.2 — 14.3 — — — Net periodic benefit costs before regulatory adjustment and intercompany allocations 129.5 56.5 107.0 3.3 (0.2) 2.7 Regulatory adjustment 29.6 5.9 (11.6) (4.0) (3.0) (0.2) Intercompany allocations n/a (0.2) (22.6) n/a 0.1 (0.3) Net periodic benefit costs (income) 159.1 62.2 72.8 (0.7) (3.1) 2.2 Other changes in plan assets and benefit obligations recognized in OCI or regulatory assets/liabilities Current year net loss 169.7 80.4 89.3 8.2 3.9 4.3 Amortization of gain (loss) (59.2) (33.8) (60.0) (0.2) — 0.6 Prior service cost 4.1 8.1 (3.9) 0.9 0.5 0.4 Amortization of prior service cost (1.8) (1.6) (0.8) (0.5) (0.5) — Total recognized in OCI or regulatory asset/liability 112.8 53.1 24.6 8.4 3.9 5.3 Total recognized in net periodic benefit costs and OCI or regulatory asset/liability $ 271.9 $ 115.3 $ 97.4 $ 7.7 $ 0.8 $ 7.5 Pension Benefits Post-Retirement Benefits Year Ended December 31, 2019 Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Components of net periodic benefit costs (millions) Service cost $ 79.1 $ 29.0 $ 50.1 $ 2.5 $ 1.1 $ 1.4 Interest cost 108.0 53.7 53.3 10.5 5.6 4.9 Expected return on plan assets (106.3) (54.8) (48.9) (10.0) (6.7) (3.3) Prior service cost 1.9 1.7 0.9 0.5 0.5 — Recognized net actuarial (gain) loss 33.0 25.5 49.8 (1.2) (0.6) (1.4) Settlement and special termination benefits 15.6 — 23.0 — — — Net periodic benefit costs before regulatory adjustment and intercompany allocations 131.3 55.1 128.2 2.3 (0.1) 1.6 Regulatory adjustment 37.4 3.0 (19.2) (3.4) (3.0) 0.4 Intercompany allocations n/a — (34.4) n/a — (0.4) Net periodic benefit costs (income) 168.7 58.1 74.6 (1.1) (3.1) 1.6 Other changes in plan assets and benefit obligations recognized in OCI or regulatory assets/liabilities Current year net (gain) loss 84.7 44.6 35.9 0.9 (3.8) 4.7 Amortization of gain (loss) (48.6) (25.5) (72.8) 1.2 0.6 1.4 Amortization of prior service cost (1.9) (1.7) (0.9) (0.5) (0.5) — Total recognized in OCI or regulatory asset/liability 34.2 17.4 (37.8) 1.6 (3.7) 6.1 Total recognized in net periodic benefit costs and OCI or regulatory asset/liability $ 202.9 $ 75.5 $ 36.8 $ 0.5 $ (6.8) $ 7.7
Schedule of Defined Benefit Plan, Plan with Projected Benefit Obligation in Excess of Plan Assets	Pension and other post-retirement benefit plans with the PBO, accumulated benefit obligation (ABO) or accumulated other post-retirement benefit obligation (APBO) in excess of the fair value of plan assets at year-end are detailed in the following tables. December 31, 2021 Evergy Evergy Kansas Central Evergy Metro (millions) ABO for all defined benefit pension plans $ 2,229.1 $ 1,124.2 $ 1,081.1 Pension plans with the PBO in excess of plan assets Projected benefit obligation $ 2,561.7 $ 1,264.4 $ 1,273.5 Fair value of plan assets 1,714.7 835.7 879.0 Pension plans with the ABO in excess of plan assets Accumulated benefit obligation $ 2,229.1 $ 1,124.2 $ 1,081.1 Fair value of plan assets 1,714.7 835.7 879.0 Other post-retirement benefit plans with the APBO in excess of plan assets Accumulated other post-retirement benefit obligation $ 258.4 $ 133.9 $ 124.5 Fair value of plan assets 242.3 124.0 118.3 December 31, 2020 Evergy Evergy Kansas Central Evergy Metro (millions) ABO for all defined benefit pension plans $ 2,534.1 $ 1,281.6 $ 1,227.4 Pension plans with the PBO in excess of plan assets Projected benefit obligation $ 2,901.1 $ 1,429.6 $ 1,446.5 Fair value of plan assets 1,799.1 887.0 912.1 Pension plans with the ABO in excess of plan assets Accumulated benefit obligation $ 2,534.1 $ 1,281.6 $ 1,227.4 Fair value of plan assets 1,799.1 887.0 912.1 Other post-retirement benefit plans with the APBO in excess of plan assets Accumulated other post-retirement benefit obligation $ 280.4 $ 146.8 $ 133.6 Fair value of plan assets 248.3 125.8 122.5
Schedule of Defined Benefit Plan, Assumptions	The following tables provide the weighted-average assumptions used to determine benefit obligations and net costs for the Evergy Companies' pension and post-retirement benefit plans. Weighted-average assumptions used to determine the benefit obligation at December 31, 2021 Pension Benefits Post-Retirement Benefits Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Discount rate 3.10 % 3.10 % 3.11 % 3.12 % 3.11 % 3.13 % Rate of compensation increase 3.75 % 3.77 % 3.71 % 3.75 % n/a 3.75 % Interest crediting rate for cash balance plans 4.13 % 4.00 % 4.45 % n/a n/a n/a Weighted-average assumptions used to determine the benefit obligation at December 31, 2020 Pension Benefits Post-Retirement Benefits Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Discount rate 2.95 % 2.93 % 2.97 % 2.84 % 2.80 % 2.88 % Rate of compensation increase 3.71 % 3.76 % 3.71 % 3.75 % n/a 3.75 % Interest crediting rate for cash balance plans 4.12 % 4.00 % 4.46 % n/a n/a n/a Weighted-average assumptions used to determine net costs for the year ended December 31, 2021 Pension Benefits Post-Retirement Benefits Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Discount rate 2.95 % 2.93 % 2.97 % 2.84 % 2.80 % 2.88 % Expected long-term return on plan assets 6.63 % 6.70 % 6.57 % 3.93 % 5.55 % 2.27 % Rate of compensation increase 3.71 % 3.78 % 3.71 % 3.75 % n/a 3.75 % Interest crediting rate for cash balance plans 4.12 % 4.00 % 4.46 % n/a n/a n/a Weighted-average assumptions used to determine net costs for the year ended December 31, 2020 Pension Benefits Post-Retirement Benefits Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Discount rate 3.62 % 3.61 % 3.64 % 3.56 % 3.54 % 3.58 % Expected long-term return on plan assets 6.63 % 6.70 % 6.56 % 4.19 % 6.00 % 2.37 % Rate of compensation increase 3.74 % 3.75 % 3.71 % 3.75 % n/a 3.75 % Interest crediting rate for cash balance plans 4.32 % 4.21 % 4.50 % n/a n/a n/a
Schedule of Expected Benefit Payments	The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid through 2031. Pension Benefits Post-Retirement Benefits Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro (millions) 2022 $ 159.5 $ 80.8 $ 77.5 $ 16.1 $ 9.2 $ 6.9 2023 160.4 79.6 79.5 15.6 9.0 6.7 2024 163.8 80.6 81.7 15.1 8.5 6.6 2025 168.1 81.3 85.3 14.7 8.2 6.5 2026 173.5 83.2 88.8 14.3 8.0 6.4 2027-2031 862.9 399.5 455.7 68.5 37.2 31.2
Schedule of Allocation of Plan Assets	The following table provides the target asset allocations by asset class for the Evergy Kansas Central and Evergy Metro pension and other post-retirement plan assets. Pension Benefits Post-Retirement Benefits Evergy Kansas Central Evergy Metro Evergy Kansas Central Evergy Metro Domestic equities 26% 26% 26% 15% International equities 20% 19% 18% 8% Bonds 39% 37% 51% 68% Mortgage & asset backed securities —% —% —% 6% Real estate investments 4% 7% —% —% Other investments 11% 11% 5% 3% The fair values of the Evergy Companies' pension plan assets at December 31, 2021 and 2020, by asset category are in the following tables. Fair Value Measurements Using December 31 Level 1 Level 2 Level 3 Assets measured at NAV (millions) Evergy Kansas Central Pension Plans Domestic equities $ 209.9 $ 177.3 $ — $ — $ 32.6 International equities 167.4 167.4 — — — Bond funds 330.4 330.4 — — — Real estate investments 28.1 — — — 28.1 Combination debt/equity/other fund 42.7 42.7 — — — Alternative investment funds 44.1 — — — 44.1 Short-term investments 13.1 — — — 13.1 Total $ 835.7 $ 717.8 $ — $ — $ 117.9 Evergy Metro Pension Plans Domestic equities $ 203.0 $ 179.5 $ — $ — $ 23.5 International equities 193.1 193.1 — — — Bond funds 260.6 260.6 — — — Corporate bonds 27.1 — 27.1 — — U.S. Treasury and agency bonds 14.5 4.7 9.8 — — Mortgage and asset backed securities 4.3 — 4.3 — — Real estate investments 55.9 — — — 55.9 Combination debt/equity/other fund 46.2 46.2 — — — Alternative investment funds 47.5 — — — 47.5 Cash and cash equivalents 14.1 14.1 — — — Short-term investments 9.5 — — — 9.5 Other 3.2 — 3.2 — — Total $ 879.0 $ 698.2 $ 44.4 $ — $ 136.4 Fair Value Measurements Using December 31 Level 1 Level 2 Level 3 Assets measured at NAV (millions) Evergy Kansas Central Pension Plans Domestic equities $ 248.5 $ 151.3 $ — $ — $ 97.2 International equities 171.2 103.8 — — 67.4 Bond funds 281.2 230.7 — — 50.5 Real estate investments 46.7 — — — 46.7 Combination debt/equity/other fund 30.4 30.4 — — — Alternative investment funds 83.6 — — — 83.6 Short-term investments 25.4 — — — 25.4 Total $ 887.0 $ 516.2 $ — $ — $ 370.8 Evergy Metro Pension Plans Domestic equities $ 247.4 $ 191.9 $ — $ — $ 55.5 International equities 220.8 153.4 — — 67.4 Bond funds 78.1 21.1 — — 57.0 Corporate bonds 133.6 — 133.6 — — U.S. Treasury and agency bonds 73.8 61.5 12.3 — — Mortgage and asset backed securities 5.0 — 5.0 — — Real estate investments 40.2 1.6 — — 38.6 Combination debt/equity/other fund 15.6 15.6 — — — Alternative investment funds 39.7 — — — 39.7 Cash and cash equivalents 57.3 57.3 — — — Short-term investments 1.4 — — — 1.4 Other (0.8) — (0.8) — — Total $ 912.1 $ 502.4 $ 150.1 $ — $ 259.6 The fair values of the Evergy Companies' post-retirement plan assets at December 31, 2021 and 2020, by asset category are in the following tables. Fair Value Measurements Using December 31 Level 1 Level 2 Level 3 Assets measured at NAV (millions) Evergy Kansas Central Post-Retirement Benefit Plans Domestic equities $ 32.5 $ 32.5 $ — $ — $ — International equities 22.1 22.1 — — — Bond funds 62.3 62.3 — — — Combination debt/equity/other fund 6.1 6.1 — — — Short-term investments 1.0 — — — 1.0 Total $ 124.0 $ 123.0 $ — $ — $ 1.0 Evergy Metro Post-Retirement Benefit Plans Domestic equities $ 20.0 $ 20.0 $ — $ — $ — International equities 12.3 12.3 — — — Bond funds 50.2 50.2 — — — Corporate bonds 18.1 — 18.1 — — U.S. Treasury and agency bonds 12.1 6.1 6.0 — — Mortgage and asset backed securities 0.8 — 0.8 — — Combination debt/equity/other fund 3.9 3.9 — — — Cash and cash equivalents 0.5 0.5 — — — Short-term investments 0.1 — — — 0.1 Other 0.3 — 0.3 — — Total $ 118.3 $ 93.0 $ 25.2 $ — $ 0.1 Fair Value Measurements Using December 31 Level 1 Level 2 Level 3 Assets measured at NAV (millions) Evergy Kansas Central Post-Retirement Benefit Plans Domestic equities $ 41.9 $ — $ — $ — $ 41.9 International equities 27.7 — — — 27.7 Bond funds 55.5 — — — 55.5 Cash and cash equivalents 0.7 0.7 — — — Total $ 125.8 $ 0.7 $ — $ — $ 125.1 Evergy Metro Post-Retirement Benefit Plans Domestic equities $ 4.6 $ 4.6 $ — $ — $ — International equities 1.2 1.2 — — — Bond funds 79.0 0.2 — — 78.8 Corporate bonds 17.9 — 17.9 — — U.S. Treasury and agency bonds 13.6 5.7 7.9 — — Mortgage and asset backed securities 0.5 — 0.5 — — Cash and cash equivalents 5.4 5.4 — — — Other 0.3 — 0.3 — — Total $ 122.5 $ 17.1 $ 26.6 $ — $ 78.8
Schedule of Health Care Cost Trend Rates	The cost trend assumptions are detailed in the following tables. Assumed annual health care cost growth rates as of December 31, 2021 Evergy Evergy Kansas Central Evergy Metro Health care cost trend rate assumed for next year 6.0 % 6.0 % 6.0 % Rate to which the cost trend is assumed to decline (the ultimate trend rate) 4.5 % 4.5 % 4.5 % Year that rate reaches ultimate trend 2030 2030 2030 Assumed annual health care cost growth rates as of December 31, 2020 Evergy Evergy Kansas Central Evergy Metro Health care cost trend rate assumed for next year 6.0 % 6.0 % 6.0 % Rate to which the cost trend is assumed to decline (the ultimate trend rate) 4.5 % 4.5 % 4.5 % Year that rate reaches ultimate trend 2027 2027 2027
Schedule of Costs of Retirement Plans	Evergy has defined contribution savings plans (401(k)) that cover substantially all employees. Evergy matches employee contributions, subject to limits. The annual costs of the plans are detailed in the following table. 2021 2020 2019 (millions) Evergy $ 25.6 $ 17.4 $ 17.6 Evergy Kansas Central 11.7 9.6 9.6 Evergy Metro 13.9 7.8 8.0

EQUITY COMPENSATION (Tables)

EQUITY COMPENSATION (Tables)	12 Months Ended
	Dec. 31, 2021
Share-based Payment Arrangement [Abstract]
Schedule of Equity Compensation Expense and Associated Income Tax Benefits	The following table summarizes the Evergy Companies' equity compensation expense and the associated income tax benefit. 2021 2020 2019 Evergy (millions) Equity compensation expense $ 15.6 $ 15.5 $ 15.5 Income tax (expense) benefit (0.1) 2.2 3.0 Evergy Kansas Central Equity compensation expense 6.9 7.6 6.7 Income tax (expense) benefit (0.2) 1.6 1.9 Evergy Metro Equity compensation expense 5.1 5.7 5.7 Income tax (expense) benefit (0.6) 0.2 0.3
Schedule of Restricted Stock Unit Activity	RSU activity for awards with performance measures for 2021 is summarized in the following table. Nonvested Grant Date Beginning balance January 1, 2021 347,964 $ 61.57 Granted 270,277 57.21 Forfeited (104,526) 64.85 Ending balance December 31, 2021 513,715 58.79 * weighted-average RSU activity for awards with only service requirements for 2021 is summarized in the following table. Nonvested Grant Date Beginning balance January 1, 2021 160,742 $ 59.42 Granted 171,363 55.30 Vested (43,785) 54.61 Forfeited (35,274) 59.24 Ending balance December 31, 2021 253,046 57.18 * weighted-average

SHORT-TERM BORROWINGS AND SHO_2

SHORT-TERM BORROWINGS AND SHORT-TERM BANK LINES OF CREDIT (Tables)	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Schedule of Short-term Debt	The following table summarizes the committed credit facilities (excluding receivable sale facilities discussed in Note 3) available to the Evergy Companies as of December 31, 2021 and 2020. Amounts Drawn Master Credit Facility Commercial Paper Letters of Credit Cash Borrowings Available Borrowings Weighted Average Interest Rate on Short-Term Borrowings December 31, 2021 (millions) Evergy, Inc. $ 700.0 $ 358.0 $ 0.7 $ — $ 341.3 0.34% Evergy Kansas Central 750.0 406.0 0.1 — 343.9 0.41% Evergy Metro 350.0 — — — 350.0 —% Evergy Missouri West 700.0 395.3 — — 304.7 0.40% Evergy $ 2,500.0 $ 1,159.3 $ 0.8 $ — $ 1,339.9 December 31, 2020 Evergy, Inc. $ 450.0 n/a $ 0.7 $ 200.0 $ 249.3 1.40% Evergy Kansas Central 1,000.0 50.0 17.0 — 933.0 0.23% Evergy Metro 600.0 — — — 600.0 —% Evergy Missouri West 450.0 65.0 2.0 — 383.0 0.36% Evergy $ 2,500.0 $ 115.0 $ 19.7 $ 200.0 $ 2,165.3 In May 2021, Evergy, Inc. established a commercial paper program supported by its borrowing capacity under the master credit facility.

LONG-TERM DEBT (Tables)

LONG-TERM DEBT (Tables)	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Schedule of Debt	The Evergy Companies' long-term debt is detailed in the following tables. December 31, 2021 Issuing Entity Year Due Evergy Evergy Kansas Central Evergy Metro Mortgage Bonds (millions) 3.25% Series Evergy Kansas Central, Inc. 2025 250.0 250.0 — 2.55% Series Evergy Kansas Central, Inc. 2026 350.0 350.0 — 3.10% Series Evergy Kansas Central, Inc. 2027 300.0 300.0 — 4.125% Series Evergy Kansas Central, Inc. 2042 550.0 550.0 — 4.10% Series Evergy Kansas Central, Inc. 2043 430.0 430.0 — 4.625% Series Evergy Kansas Central, Inc. 2043 250.0 250.0 — 4.25% Series Evergy Kansas Central, Inc. 2045 300.0 300.0 — 3.25% Series Evergy Kansas Central, Inc. 2049 300.0 300.0 3.45% Series Evergy Kansas Central, Inc. 2050 500.0 500.0 — 6.15% Series Evergy Kansas South, Inc. 2023 50.0 50.0 — 6.53% Series Evergy Kansas South, Inc. 2037 175.0 175.0 — 6.64% Series Evergy Kansas South, Inc. 2038 100.0 100.0 — 4.30% Series Evergy Kansas South, Inc. 2044 250.0 250.0 — 2.95% EIRR bonds Evergy Metro, Inc. 2023 79.5 — 79.5 4.125% Series Evergy Metro, Inc. 2049 400.0 — 400.0 2.25% Series Evergy Metro, Inc. 2030 400.0 — 400.0 Pollution Control Bonds 0.132% Series (b) Evergy Kansas Central, Inc. 2032 45.0 45.0 — 0.132% Series (b) Evergy Kansas Central, Inc. 2032 30.5 30.5 — 0.132% Series (b) Evergy Kansas South, Inc. 2027 21.9 21.9 — 2.50% Series Evergy Kansas South, Inc. 2031 50.0 50.0 — 0.132% Series (b) Evergy Kansas South, Inc. 2032 14.5 14.5 — 0.132% Series (b) Evergy Kansas South, Inc. 2032 10.0 10.0 — 0.167% Series 2007A and 2007B (b) Evergy Metro, Inc. 2035 146.5 — 146.5 2.75% Series 2008 Evergy Metro, Inc. 2038 23.4 — 23.4 Senior Notes 3.15% Series (g) Evergy Metro, Inc. 2023 300.0 — 300.0 3.65% Series (g) Evergy Metro, Inc. 2025 350.0 — 350.0 6.05% Series (5.78% rate) (a)(g) Evergy Metro, Inc. 2035 250.0 — 250.0 5.30% Series (g) Evergy Metro, Inc. 2041 400.0 — 400.0 4.20% Series (g) Evergy Metro, Inc. 2047 300.0 — 300.0 4.20% Series (g) Evergy Metro, Inc. 2048 300.0 — 300.0 3.49% Series A (h) Evergy Missouri West, Inc. 2025 36.0 — — 4.06% Series B (h) Evergy Missouri West, Inc. 2033 60.0 — — 4.74% Series C (h) Evergy Missouri West, Inc. 2043 150.0 — — 3.74% Series (h) Evergy Missouri West, Inc. 2022 100.0 — — 2.86% Series A (h) Evergy Missouri West, Inc. 2031 350.0 — — 3.01% Series B (h) Evergy Missouri West, Inc. 2033 75.0 — — 3.21% Series C (h) Evergy Missouri West, Inc. 2036 75.0 — — 5.292% Series Evergy, Inc. (f) 2022 287.5 — — 2.45% Series Evergy, Inc. 2024 800.0 — — 2.90% Series (3.77% rate) (a) Evergy, Inc. 2029 800.0 — — Medium Term Notes 7.33% Series (h) Evergy Missouri West, Inc. 2023 3.0 — — 7.17% Series (h) Evergy Missouri West, Inc. 2023 7.0 — — Fair value adjustment (e) 97.9 — — Current maturities (c) (389.3) — — Unamortized debt discount and debt issuance costs (80.5) (42.7) (24.4) Total excluding current maturities (d) $ 9,297.9 $ 3,934.2 $ 2,925.0 December 31, 2020 Issuing Entity Year Due Evergy Evergy Kansas Central Evergy Metro Mortgage Bonds (millions) 3.25% Series Evergy Kansas Central, Inc. 2025 $ 250.0 $ 250.0 $ — 2.55% Series Evergy Kansas Central, Inc. 2026 350.0 350.0 — 3.10% Series Evergy Kansas Central, Inc. 2027 300.0 300.0 — 4.125% Series Evergy Kansas Central, Inc. 2042 550.0 550.0 — 4.10% Series Evergy Kansas Central, Inc. 2043 430.0 430.0 — 4.625% Series Evergy Kansas Central, Inc. 2043 250.0 250.0 — 4.25% Series Evergy Kansas Central, Inc. 2045 300.0 300.0 — 3.25% Series Evergy Kansas Central, Inc. 2049 300.0 300.0 3.45% Series Evergy Kansas Central, Inc. 2050 500.0 500.0 — 6.15% Series Evergy Kansas South, Inc. 2023 50.0 50.0 — 6.53% Series Evergy Kansas South, Inc. 2037 175.0 175.0 — 6.64% Series Evergy Kansas South, Inc. 2038 100.0 100.0 — 4.30% Series Evergy Kansas South, Inc. 2044 250.0 250.0 — 2.95% EIRR bonds Evergy Metro, Inc. 2023 79.5 — 79.5 4.125% Series Evergy Metro, Inc. 2049 400.0 — 400.0 2.25% Series Evergy Metro, Inc. 2030 400.0 — 400.0 9.44% Series (h) Evergy Missouri West, Inc. 2021 1.1 — — Pollution Control Bonds 0.18% Series (b) Evergy Kansas Central, Inc. 2032 45.0 45.0 — 0.18% Series (b) Evergy Kansas Central, Inc. 2032 30.5 30.5 — 0.18% Series (b) Evergy Kansas South, Inc. 2027 21.9 21.9 — 2.50% Series Evergy Kansas South, Inc. 2031 50.0 50.0 — 0.18% Series (b) Evergy Kansas South, Inc. 2032 14.5 14.5 — 0.18% Series (b) Evergy Kansas South, Inc. 2032 10.0 10.0 — 0.20% Series 2007A and 2007B (b) Evergy Metro, Inc. 2035 146.5 — 146.5 2.75% Series 2008 Evergy Metro, Inc. 2038 23.4 — 23.4 Senior Notes 3.15% Series (g) Evergy Metro, Inc. 2023 300.0 — 300.0 3.65% Series (g) Evergy Metro, Inc. 2025 350.0 — 350.0 6.05% Series (5.78% rate) (a)(g) Evergy Metro, Inc. 2035 250.0 — 250.0 5.30% Series (g) Evergy Metro, Inc. 2041 400.0 — 400.0 4.20% Series (g) Evergy Metro, Inc. 2047 300.0 — 300.0 4.20% Series (g) Evergy Metro, Inc. 2048 300.0 — 300.0 8.27% Series (h) Evergy Missouri West, Inc. 2021 80.9 — — 3.49% Series A Evergy Missouri West, Inc. 2025 36.0 — — 4.06% Series B Evergy Missouri West, Inc. 2033 60.0 — — 4.74% Series C Evergy Missouri West, Inc. 2043 150.0 — — 3.74% Series Evergy Missouri West, Inc. 2022 100.0 — — 4.85% Series Evergy, Inc. (f) 2021 350.0 — — 5.292% Series Evergy, Inc. (f) 2022 287.5 — — 2.45% Series Evergy, Inc. 2024 800.0 — — 2.90% Series (3.77% rate) (a) Evergy, Inc. 2029 800.0 — — Medium Term Notes 7.33% Series (h) Evergy Missouri West, Inc. 2023 3.0 — — 7.17% Series (h) Evergy Missouri West, Inc. 2023 7.0 — — Fair value adjustment (e) 110.4 — — Current maturities (c) (436.4) — — Unamortized debt discount and debt issuance costs (84.9) (45.4) (26.4) Total excluding current maturities (d) $ 9,190.9 $ 3,931.5 $ 2,923.0 (a) Rate after amortizing gains/losses recognized in OCI on settlements of interest rate hedging instruments. (b) Variable rate. (c) Evergy's current maturities total as of December 31, 2021 and 2020, includes $1.8 million and $4.4 million, respectively, of fair value adjustments recorded in connection with purchase accounting for the Great Plains Energy and Evergy Kansas Central merger. (d) At December 31, 2021 and 2020, does not include $50.0 million and $21.9 million of secured Series 2005 Environmental Improvement Revenue Refunding (EIRR) bonds because the bonds were repurchased in September 2015 and are held by Evergy Metro. (e) Represents the fair value adjustments recorded at Evergy consolidated related to the long-term debt of Great Plains Energy, Evergy Metro and Evergy Missouri West in connection with purchase accounting for the Great Plains Energy and Evergy Kansas Central merger. This amount is not part of future principal payments and will amortize over the remaining life of the associated debt instruments. (f) Originally issued by Great Plains Energy but assumed by Evergy, Inc. as part of the Great Plains Energy and Evergy Kansas Central merger. (g) Effectively secured pursuant to the General Mortgage Indenture and Deed of Trust dated as of December 1, 1986, as supplemented (Evergy Metro Mortgage Indenture) through the issuance of collateral mortgage bonds to the trustee in 2019. (h) Unconditionally guaranteed by Evergy, Inc.
Schedule of Maturities of Long-Term Debt	Evergy's, Evergy Kansas Central's and Evergy Metro's long-term debt maturities for the next five years are detailed in the following table. 2022 2023 2024 2025 2026 (millions) Evergy $ 387.5 $ 439.5 $ 800.0 $ 636.0 $ 350.0 Evergy Kansas Central — 50.0 — 250.0 350.0 Evergy Metro — 379.5 — 350.0 —

FAIR VALUE MEASUREMENTS (Tables

FAIR VALUE MEASUREMENTS (Tables)	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Schedule of Carrying Value and Fair Value of Debt Instruments	The book value and fair value of the Evergy Companies' long-term debt and long-term debt of variable interest entities is summarized in the following table. December 31, 2021 December 31, 2020 Book Value Fair Value Book Value Fair Value Long-term debt (a) (millions) Evergy (b) $ 9,687.2 $ 10,758.5 $ 9,627.3 $ 11,274.2 Evergy Kansas Central 3,934.2 4,522.5 3,931.5 4,801.7 Evergy Metro 2,925.0 3,400.8 2,923.0 3,591.2 Long-term debt of variable interest entities (a) Evergy $ — $ — $ 18.8 $ 19.1 Evergy Kansas Central — — 18.8 19.1 (a) Includes current maturities. (b) Book value as of December 31, 2021 and 2020, includes $97.9 million and $110.4 million, respectively, of fair value adjustments recorded in connection with purchase accounting for the Great Plains Energy and Evergy Kansas Central merger, which are not part of future principal payments and will amortize over the remaining life of the associated debt instrument.
Schedule of Fair Value of Assets and Liabilities	The following tables include the Evergy Companies' balances of financial assets and liabilities measured at fair value on a recurring basis. Description December 31, 2021 Level 1 Level 2 Level 3 NAV Evergy Kansas Central (millions) Assets Nuclear decommissioning trust (a) Domestic equity funds $ 140.4 $ 126.5 $ — $ — $ 13.9 International equity funds 74.0 74.0 — — — Core bond fund 58.1 58.1 — — — High-yield bond fund 29.6 29.6 — — — Emerging markets bond fund 18.0 18.0 — — — Alternative investments fund 32.7 — — — 32.7 Real estate securities fund 15.2 — — — 15.2 Cash equivalents 0.4 0.4 — — — Total nuclear decommissioning trust 368.4 306.6 — — 61.8 Rabbi trust Fixed income funds 19.6 19.6 — — — Equity funds 9.5 9.5 — — — Combination debt/equity/other fund 2.4 2.4 — — — Cash equivalents 0.2 0.2 — — — Total rabbi trust 31.7 31.7 — — — Total $ 400.1 $ 338.3 $ — $ — $ 61.8 Evergy Metro Assets Nuclear decommissioning trust (a) Equity securities $ 299.2 $ 299.2 $ — $ — $ — Debt securities U.S. Treasury 46.1 46.1 — — — U.S. Agency 0.4 — 0.4 — — State and local obligations 4.0 — 4.0 — — Corporate bonds 43.7 — 43.7 — — Foreign governments 0.1 — 0.1 — — Cash equivalents 6.8 6.8 — — — Other — — — — — Total nuclear decommissioning trust 400.3 352.1 48.2 — — Self-insured health plan trust (b) Equity securities 2.0 2.0 — — — Debt securities 8.7 2.7 6.0 — — Cash and cash equivalents 1.8 1.8 — — — Total self-insured health plan trust 12.5 6.5 6.0 — — Total $ 412.8 $ 358.6 $ 54.2 $ — $ — Other Evergy Other Evergy investments Equity securities (c) $ 31.4 $ — $ 31.4 $ — $ — Total other Evergy investments 31.4 — 31.4 — — Rabbi trusts Core bond fund 12.5 12.5 — — — Total rabbi trusts 12.5 12.5 — — — Total $ 43.9 $ 12.5 $ 31.4 $ — $ — Evergy Assets Nuclear decommissioning trust (a) $ 768.7 $ 658.7 $ 48.2 $ — $ 61.8 Rabbi trusts 44.2 44.2 — — — Self-insured health plan trust (b) 12.5 6.5 6.0 — — Other Evergy investments (c) 31.4 — 31.4 — — Total $ 856.8 $ 709.4 $ 85.6 $ — $ 61.8 Description December 31, 2020 Level 1 Level 2 Level 3 NAV Evergy Kansas Central (millions) Assets Nuclear decommissioning trust (a) Domestic equity funds $ 102.7 $ 95.1 $ — $ — $ 7.6 International equity funds 63.8 63.8 — — — Core bond fund 40.6 40.6 — — — High-yield bond fund 25.0 25.0 — — — Emerging markets bond fund 21.0 21.0 — — — Combination debt/equity/other fund 20.1 20.1 — — — Alternative investments fund 23.2 — — — 23.2 Real estate securities fund 12.9 — — — 12.9 Cash equivalents 0.5 0.5 — — — Total nuclear decommissioning trust 309.8 266.1 — — 43.7 Rabbi trust Core bond fund 25.6 — — — 25.6 Combination debt/equity/other fund 7.1 — — — 7.1 Total rabbi trust 32.7 — — — 32.7 Total $ 342.5 $ 266.1 $ — $ — $ 76.4 Evergy Metro Assets Nuclear decommissioning trust (a) Equity securities $ 243.1 $ 243.1 $ — $ — $ — Debt securities U.S. Treasury 47.7 47.7 — — — U.S. Agency 0.5 — 0.5 — — State and local obligations 4.1 — 4.1 — — Corporate bonds 43.1 — 43.1 — — Foreign governments 0.1 — 0.1 — — Cash equivalents 3.2 3.2 — — — Other 0.5 0.5 — — — Total nuclear decommissioning trust 342.3 294.5 47.8 — — Self-insured health plan trust (b) Equity securities 1.7 1.7 — — — Debt securities 8.0 2.8 5.2 — — Cash and cash equivalents 3.5 3.5 — — — Total self-insured health plan trust 13.2 8.0 5.2 — — Total $ 355.5 $ 302.5 $ 53.0 $ — $ — Other Evergy Assets Rabbi trusts Fixed income fund $ 13.1 $ — $ — $ — $ 13.1 Cash and cash equivalents 0.5 0.5 — — — Total rabbi trusts $ 13.6 $ 0.5 $ — $ — $ 13.1 Evergy Assets Nuclear decommissioning trust (a) $ 652.1 $ 560.6 $ 47.8 $ — $ 43.7 Rabbi trust 46.3 0.5 — — 45.8 Self-insured health plan trust (b) 13.2 8.0 5.2 — — Total $ 711.6 $ 569.1 $ 53.0 $ — $ 89.5 (a) With the exception of investments measured at NAV, fair value is based on quoted market prices of the investments held by the trust and/or valuation models. (b) Fair value is based on quoted market prices of the investments held by the trust. Debt securities classified as Level 1 are comprised of U.S. Treasury securities. Debt securities classified as Level 2 are comprised of corporate bonds, U.S. Agency, state and local obligations, and other asset-backed securities. (c) Fair value is based on quoted market prices adjusted for a discount for lack of marketability based on a valuation model due to a restriction on the sale of the stock.
Schedule of Fair Value Investments, Entities that Calculate NAV	The following table provides additional information on these Evergy and Evergy Kansas Central investments. December 31, 2021 December 31, 2020 December 31, 2021 Fair Unfunded Fair Unfunded Redemption Length of Value Commitments Value Commitments Frequency Settlement Evergy Kansas Central (millions) Nuclear decommissioning trust: Domestic equity funds $ 13.9 $ 1.7 $ 7.6 $ 2.2 (a) (a) Alternative investments fund (b) 32.7 — 23.2 — Quarterly 65 days Real estate securities fund (b) 15.2 — 12.9 — Quarterly 65 days Total $ 61.8 $ 1.7 $ 43.7 $ 2.2 Rabbi trust: Core bond fund $ — $ — $ 25.6 $ — (c) (c) Combination debt/equity/other fund — — 7.1 — (c) (c) Total $ — $ — $ 32.7 $ — Other Evergy Rabbi trust: Fixed income fund $ — $ — $ 13.1 $ — (c) (c) Total Evergy investments at NAV $ 61.8 $ 1.7 $ 89.5 $ 2.2 (a) This investment is in five long-term private equity funds that do not permit early withdrawal. Investments in these funds cannot be distributed until the underlying investments have been liquidated, which may take years from the date of initial liquidation. Three funds have begun to make distributions. The initial investment in the fourth and fifth funds occurred in 2016 and 2018, respectively. The fourth fund's term is 15 years, subject to the general partner's right to extend the term for up to three additional one-year periods. The fifth fund's term is 15 years, subject to additional extensions approved by a fund advisory committee to provide for an orderly liquidation of fund investments and dissolution of the fund. (b) There is a holdback on final redemptions. (c) This investment can be redeemed immediately and is not subject to any restrictions on redemptions.
Schedule of Fair Value Recurring Gain (Loss) Included in Earnings	The following table summarizes the net unrealized gains (losses) for the Evergy Companies' nuclear decommissioning trusts and rabbi trusts. 2021 2020 2019 Evergy (millions) Nuclear decommissioning trust - equity securities $ 101.8 $ 45.5 74.0 Nuclear decommissioning trust - debt securities (4.5) 5.3 5.1 Rabbi trusts - equity securities (1.8) (5.6) 3.1 Total $ 95.5 $ 45.2 $ 82.2 Evergy Kansas Central Nuclear decommissioning trust - equity securities $ 50.5 $ 21.9 33.3 Rabbi trust - equity securities (1.4) (6.1) 3.2 Total $ 49.1 $ 15.8 $ 36.5 Evergy Metro Nuclear decommissioning trust - equity securities $ 51.3 $ 23.6 40.7 Nuclear decommissioning trust - debt securities (4.5) 5.3 5.1 Total $ 46.8 $ 28.9 $ 45.8

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Tables)	12 Months Ended
	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Schedule of Contractual Obligation	The Evergy Companies' contractual commitments for fuel and power at December 31, 2021 are detailed in the following tables. See Notes 9, 12 and 20 for information regarding pension, long-term debt and lease commitments, respectively. Evergy 2022 2023 2024 2025 2026 After 2026 Total Purchase commitments (millions) Fuel $ 403.1 $ 183.5 $ 130.2 $ 100.4 $ 106.7 $ 221.1 $ 1,145.0 Power 63.0 63.6 58.0 58.4 58.4 294.2 595.6 Total fuel and power commitments $ 466.1 $ 247.1 $ 188.2 $ 158.8 $ 165.1 $ 515.3 $ 1,740.6 Evergy Kansas Central 2022 2023 2024 2025 2026 After 2026 Total Purchase commitments (millions) Fuel $ 232.4 $ 102.6 $ 83.3 $ 69.4 $ 72.6 $ 121.3 $ 681.6 Power 0.9 0.9 0.9 0.9 0.9 3.6 8.1 Total fuel and power commitments $ 233.3 $ 103.5 $ 84.2 $ 70.3 $ 73.5 $ 124.9 $ 689.7 Evergy Metro 2022 2023 2024 2025 2026 After 2026 Total Purchase commitments (millions) Fuel $ 145.3 $ 73.7 $ 43.3 $ 28.4 $ 31.4 $ 99.8 $ 421.9 Power 35.1 35.3 29.2 29.2 29.2 166.9 324.9 Total fuel and power commitments $ 180.4 $ 109.0 $ 72.5 $ 57.6 $ 60.6 $ 266.7 $ 746.8

RELATED PARTY TRANSACTIONS AN_2

RELATED PARTY TRANSACTIONS AND RELATIONSHIPS (Tables)	12 Months Ended
	Dec. 31, 2021
Related Party Transactions [Abstract]
Schedule of Related Party Receivables and Payables	The operating expenses and capital costs billed for jointly-owned plants and shared services are detailed in the following table. 2021 2020 2019 (millions) Evergy Kansas Central billings to Evergy Missouri West $ 32.5 $ 37.6 $ 24.9 Evergy Metro billings to Evergy Missouri West 142.1 168.7 172.8 Evergy Kansas Central billings to Evergy Metro 29.4 34.7 40.6 Evergy Metro billings to Evergy Kansas Central 134.7 130.8 154.9 The following table summarizes Evergy Kansas Central's and Evergy Metro's related party net receivables and payables. December 31 2021 2020 Evergy Kansas Central (millions) Net receivable from (payable to) Evergy $ (2.2) $ 0.1 Net payable to Evergy Metro (14.5) (21.7) Net receivable from Evergy Missouri West 10.4 6.6 Evergy Metro Net receivable from Evergy $ 8.7 $ 15.7 Net receivable from Evergy Kansas Central 14.5 21.7 Net receivable from Evergy Missouri West 254.5 188.1 December 31 2021 2020 Evergy Kansas Central (millions) Income taxes receivable from Evergy $ 9.6 $ 25.3 Evergy Metro Income taxes receivable from (payable to) Evergy $ (2.5) $ 3.2

VARIABLE INTEREST ENTITIES (Tab

VARIABLE INTEREST ENTITIES (Tables)	12 Months Ended
	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Variable Interest Entities	The following table summarizes the assets and liabilities related to the VIE described above that are recorded on Evergy's and Evergy Kansas Central's consolidated balance sheets. December 31 2021 2020 Assets: (millions) Property, plant and equipment of variable interest entities, net $ 147.8 $ 154.9 Liabilities: Current maturities of long-term debt of variable interest entities $ — $ 18.8 Accrued interest (a) — 0.1

TAXES (Tables)

TAXES (Tables)	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	Components of income tax expense are detailed in the following tables. Evergy 2021 2020 2019 Current income taxes (millions) Federal $ 15.6 $ (26.8) $ (39.5) State (0.4) 2.1 15.0 Total 15.2 (24.7) (24.5) Deferred income taxes Federal 92.8 73.1 93.2 State 14.7 59.8 27.5 Total 107.5 132.9 120.7 Investment tax credit Deferral 0.4 — 5.2 Amortization (5.7) (6.0) (4.4) Total (5.3) (6.0) 0.8 Income tax expense $ 117.4 $ 102.2 $ 97.0 Evergy Kansas Central 2021 2020 2019 Current income taxes (millions) Federal $ 53.3 $ 14.5 $ 37.9 State (0.2) (5.3) 2.6 Total 53.1 9.2 40.5 Deferred income taxes Federal 3.8 (16.7) (8.9) State (1.2) 168.1 18.4 Total 2.6 151.4 9.5 Investment tax credit Deferral 0.3 — 5.2 Amortization (4.3) (4.8) (3.1) Total (4.0) (4.8) 2.1 Income tax expense $ 51.7 $ 155.8 $ 52.1 Evergy Metro 2021 2020 2019 Current income taxes (millions) Federal $ 39.2 $ (0.2) $ 43.9 State 3.2 10.8 22.4 Total 42.4 10.6 66.3 Deferred income taxes Federal 6.5 29.8 (24.5) State 4.8 (32.2) (5.0) Total 11.3 (2.4) (29.5) Investment tax credit Amortization (1.3) (1.1) (1.1) Total (1.3) (1.1) (1.1) Income tax expense $ 52.4 $ 7.1 $ 35.7
Schedule of Effective Income Tax Rate Reconciliation	Effective income tax rates reflected in the financial statements and the reasons for their differences from the statutory federal rates are detailed in the following tables. Evergy 2021 2020 2019 Federal statutory income tax 21.0 % 21.0 % 21.0 % COLI policies (1.0) (1.6) (1.8) State income taxes 1.0 4.3 5.0 Flow through depreciation for plant-related differences (5.4) (5.3) (4.5) Federal tax credits (2.8) (4.6) (4.9) Non-controlling interest (0.3) (0.3) (0.4) AFUDC equity (0.6) (0.5) (0.1) Amortization of federal investment tax credits (0.4) (0.6) (0.5) Changes in uncertain tax positions, net — — (0.2) Federal or state tax rate change — 1.9 — Valuation allowance — (0.2) (1.0) Stock compensation — (0.1) 0.1 Officer compensation limitation 0.5 0.2 0.1 Other (0.4) (0.2) (0.4) Effective income tax rate 11.6 % 14.0 % 12.4 % Evergy Kansas Central 2021 2020 2019 Federal statutory income tax 21.0 % 21.0 % 21.0 % COLI policies (1.7) (2.8) (3.3) State income taxes (0.4) 3.8 5.3 Flow through depreciation for plant-related differences (3.0) (0.1) (0.1) Federal tax credits (5.0) (7.1) (7.4) Non-controlling interest (0.5) (0.6) (0.8) AFUDC equity (0.6) (0.5) (0.1) Amortization of federal investment tax credits (0.5) (0.7) (0.7) Changes in uncertain tax positions, net — — (0.4) Federal or state tax rate change — 27.8 — Valuation allowance — — (0.4) Stock compensation (0.1) (0.1) (0.1) Officer compensation limitation 0.3 — — Other (0.1) (0.9) (0.3) Effective income tax rate 9.4 % 39.8 % 12.7 % Evergy Metro 2021 2020 2019 Federal statutory income tax 21.0 % 21.0 % 21.0 % COLI policies (0.2) (0.3) (0.2) State income taxes 1.7 4.9 4.7 Flow through depreciation for plant-related differences (7.8) (10.0) (9.4) Federal tax credits (0.2) (1.9) (2.5) AFUDC equity (0.7) (0.5) (0.2) Amortization of federal investment tax credits (0.4) (0.4) (0.4) Federal or state tax rate change — (10.5) — Stock compensation — (0.4) — Officer compensation limitation 0.9 0.4 0.3 Other 0.1 — (1.0) Effective income tax rate 14.4 % 2.3 % 12.3 %
Schedule of Deferred Income Tax Assets and Liabilities	The tax effects of major temporary differences resulting in deferred income tax assets (liabilities) in the consolidated balance sheets is in the following table. December 31 2021 2020 Evergy Evergy Kansas Central Evergy Metro Evergy Evergy Kansas Central Evergy Metro Deferred tax assets: (millions) Tax credit carryforward $ 375.2 $ 206.3 $ 162.1 $ 379.6 $ 176.5 $ 195.9 Income taxes refundable to customers, net 336.6 168.5 123.8 418.2 237.5 132.8 Deferred employee benefit costs 158.3 84.8 86.8 227.6 105.4 117.9 Net operating loss carryforward 40.2 — — 51.0 — 0.2 Deferred state income taxes 146.9 101.0 38.6 145.9 101.7 37.8 Accrued liabilities 157.6 71.3 56.4 152.7 61.8 61.0 Other 200.0 100.6 59.6 181.0 91.4 44.8 Total deferred tax assets before 1,414.8 732.5 527.3 1,556.0 774.3 590.4 Valuation allowances (12.8) — — (14.4) — — Total deferred tax assets, net 1,402.0 732.5 527.3 1,541.6 774.3 590.4 Deferred tax liabilities: Plant-related (2,701.1) (1,308.7) (996.7) (2,693.7) (1,341.2) (972.1) Deferred employee benefit costs (96.8) (52.9) (43.5) (171.4) (75.6) (76.3) ARO regulatory assets (133.7) (53.9) (49.9) (136.7) (49.9) (54.3) Acquisition premium (43.9) (43.9) — (46.9) (46.9) — Other regulatory assets (152.1) (53.3) (20.4) (28.8) (2.8) (16.4) Other (136.3) (87.7) (22.9) (128.9) (82.4) (30.1) Total deferred tax liabilities (3,263.9) (1,600.4) (1,133.4) (3,206.4) (1,598.8) (1,149.2) Net deferred income tax liabilities $ (1,861.9) $ (867.9) $ (606.1) $ (1,664.8) $ (824.5) $ (558.8)
Summary of Related Tax Benefit Amounts	The year of origin of Evergy's, Evergy Kansas Central's and Evergy Metro's related tax benefit amounts for federal tax credit carryforwards as of December 31, 2021 are detailed in the following table. Amount of Benefit Year of Origin Evergy Evergy Kansas Central Evergy Metro (millions) 2004 0.1 — — 2005 0.1 — — 2006 0.1 — — 2007 0.1 — — 2009 38.2 0.2 37.9 2010 18.3 — 18.2 2011 13.3 — 13.2 2012 12.8 2.0 10.7 2013 24.3 11.3 12.9 2014 24.1 10.7 13.0 2015 24.7 10.9 13.2 2016 27.1 11.0 12.4 2017 43.9 35.1 8.2 2018 43.9 36.3 7.5 2019 37.7 30.9 6.7 2020 35.9 28.3 7.4 2021 29.0 28.0 0.8 $ 373.6 $ 204.7 $ 162.1
Summary of Operating Loss Carryforwards	The year of origin of Evergy's related tax benefit amounts for federal NOL carryforwards as of December 31, 2021 are detailed in the following table. Year of Origin Amount of Benefit (millions) 2005 $ 1.9 2006 31.7 $ 33.6

LEASES (Tables)

LEASES (Tables)	12 Months Ended
	Dec. 31, 2021
Leases [Abstract]
Schedule of Lease Expense	The Evergy Companies’ lease expense is detailed in the following table. Evergy 2021 2020 2019 Finance lease costs (millions) Amortization of right-of-use assets $ 5.1 $ 7.7 $ 5.2 Interest on lease liabilities 2.5 3.1 2.9 Operating lease costs 21.8 22.9 23.8 Short-term lease costs 5.9 2.1 4.0 Variable lease costs for renewable purchase power agreements 280.3 296.6 313.0 Total lease costs $ 315.6 $ 332.4 $ 348.9 Evergy Kansas Central 2021 2020 2019 Finance lease costs (millions) Amortization of right-of-use assets $ 4.5 $ 7.2 $ 5.0 Interest on lease liabilities 2.4 2.8 2.7 Operating lease costs 12.9 11.9 13.2 Short-term lease costs 1.8 0.5 1.2 Variable lease costs for renewable purchase power agreements 145.8 135.6 130.8 Total lease costs $ 167.4 $ 158.0 $ 152.9 Evergy Metro 2021 2020 2019 Finance lease costs (millions) Amortization of right-of-use assets $ 0.4 $ 0.3 $ 0.1 Interest on lease liabilities 0.1 0.1 0.1 Operating lease costs 9.0 9.3 9.2 Short-term lease costs 3.0 1.5 2.6 Variable lease costs for renewable purchase power agreements 101.0 112.2 129.2 Total lease costs $ 113.5 $ 123.4 $ 141.2 Supplemental cash flow information related to the Evergy Companies' leases is detailed in the following table. Evergy 2021 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: (millions) Operating cash flows from operating leases $ 20.7 $ 22.2 $ 21.7 Operating cash flows from finance leases 2.6 2.8 2.8 Financing cash flows from finance leases 5.3 5.6 5.0 Right-of-use assets obtained in exchange for new operating lease liabilities 16.4 6.9 10.4 Right-of-use assets obtained in exchange for new finance lease liabilities 1.4 5.6 8.3 Evergy Kansas Central 2021 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: (millions) Operating cash flows from operating leases $ 11.8 $ 12.9 $ 13.7 Operating cash flows from finance leases 2.4 2.5 2.6 Financing cash flows from finance leases 4.7 5.1 4.8 Right-of-use assets obtained in exchange for new operating lease liabilities 7.1 6.6 6.1 Right-of-use assets obtained in exchange for new finance lease liabilities 1.4 4.0 8.3 Evergy Metro 2021 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: (millions) Operating cash flows from operating leases $ 10.4 $ 10.8 $ 9.9 Operating cash flows from finance leases 0.1 0.1 0.1 Financing cash flows from finance leases 0.5 0.4 0.1 Right-of-use assets obtained in exchange for new operating lease liabilities 9.3 0.3 2.4 Right-of-use assets obtained in exchange for new finance lease liabilities — 1.6 —
Schedule of Payments for Finance Leases	Payments and other supplemental information for finance leases as of December 31, 2021, are detailed in the following table. Evergy Evergy Kansas Central Evergy Metro (millions) 2022 $ 7.8 $ 7.1 $ 0.6 2023 6.7 5.9 0.6 2024 5.5 4.7 0.6 2025 4.7 4.2 0.3 2026 4.4 3.9 0.2 After 2026 38.5 37.8 0.3 Total finance lease payments 67.6 63.6 2.6 Amounts representing imputed interest (21.3) (20.6) (0.4) Present value of lease payments 46.3 43.0 2.2 Less: current portion (5.4) (4.9) (0.5) Total long-term obligations under finance leases $ 40.9 $ 38.1 $ 1.7 Right-of-use assets under finance leases included in property, plant and equipment, net on the consolidated balance sheets $ 310.3 $ 50.6 $ 2.2 Weighted-average remaining lease term (years) 13.3 13.9 5.0 Weighted-average discount rate 5.6 % 5.6 % 5.1 %
Schedule of Lease Payments for Operating Leases	Lease payments and other supplemental information for operating leases as of December 31, 2021, are detailed in the following table. Evergy Evergy Kansas Central Evergy Metro (millions) 2022 $ 18.8 $ 9.4 $ 9.2 2023 15.3 6.5 8.6 2024 12.5 4.3 7.9 2025 8.5 2.2 6.4 2026 5.9 0.7 5.4 After 2026 30.3 0.1 30.3 Total operating lease payments 91.3 23.2 67.8 Amounts representing imputed interest (7.3) (1.0) (6.3) Present value of lease payments 84.0 22.2 61.5 Less: current portion (17.1) (9.0) (8.0) Total long-term obligations under operating leases $ 66.9 $ 13.2 $ 53.5 Right-of-use assets under operating leases included in other assets on the consolidated balance sheets $ 90.7 $ 29.0 $ 46.7 Weighted-average remaining lease term (years) 7.6 3.0 9.3 Weighted-average discount rate 2.2 % 2.4 % 2.1 %

SUMMARY OF SIGNIFICANT ACCOUN_4

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Organization (Details) customer in Millions, $ in Millions	Dec. 31, 2021USD ($)MW	Oct. 01, 2021USD ($)	Feb. 28, 2021USD ($)	Dec. 31, 2021customersubsidiarykilovolt_linemiMW
Summary Of Accounting Policies [Line Items]
Owned generating capacity and renewable purchased power | MW	15,400			15,400
Number of customers served | customer				1.6
Increase of Natural Gas and Purchased Power Costs, Net Increase in Wholesale Revenues			$ 365.5
Evergy Kansas Central
Summary Of Accounting Policies [Line Items]
Increase of Natural Gas and Purchased Power Costs, Net Increase in Wholesale Revenues			133.9
Increase of Energy Marketing Margins			94.5
Prairie Wind Transmission, LLC
Summary Of Accounting Policies [Line Items]
Transmission line length | mi				108
Transmission line electrical potential | kilovolt_line				345
Evergy Missouri West
Summary Of Accounting Policies [Line Items]
Increase of Natural Gas and Purchased Power Costs, Net Increase in Wholesale Revenues			296.4
Evergy Metro
Summary Of Accounting Policies [Line Items]
Increase of Natural Gas and Purchased Power Costs, Net Increase in Wholesale Revenues			$ (64.8)
Transource Energy, LLC | Evergy Transmission Company LLC
Summary Of Accounting Policies [Line Items]
Ownership percentage	13.50%			13.50%
Prairie Wind Transmission, LLC | Evergy Kansas Central
Summary Of Accounting Policies [Line Items]
Ownership percentage	50.00%			50.00%
Early-Stage Energy Solution Company
Summary Of Accounting Policies [Line Items]
Unrealized Gain on Investments	$ 27.7
Initial Investment On Equity Investment		$ 3.7
Evergy Kansas South Inc | Evergy Kansas Central
Summary Of Accounting Policies [Line Items]
Number of active wholly owned subsidiaries | subsidiary				1
AEP Transmission Holding Company, LLC | Transource Energy, LLC
Summary Of Accounting Policies [Line Items]
Ownership interest	86.50%			86.50%

SUMMARY OF SIGNIFICANT ACCOUN_5

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Fuel Inventory and Supplies (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Inventory [Line Items]
Fuel inventory	$ 160.9	$ 145
Supplies	405.8	359.5
Fuel inventory and supplies	566.7	504.5
Evergy Kansas Central
Inventory [Line Items]
Fuel inventory	74.3	79.3
Supplies	208.9	197.1
Fuel inventory and supplies	283.2	276.4
Evergy Metro
Inventory [Line Items]
Fuel inventory	62	44.9
Supplies	149	125.5
Fuel inventory and supplies	$ 211	$ 170.4

SUMMARY OF SIGNIFICANT ACCOUN_6

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Allowance For Funds Used During Construction (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
AFUDC borrowed funds	$ 14.7	$ 16.5	$ 14.5
AFUDC equity funds	29.4	17.2	2.2
Total	44.1	33.7	16.7
Evergy Kansas Central
Property, Plant and Equipment [Line Items]
AFUDC borrowed funds	7.1	8.5	7.5
AFUDC equity funds	14.9	9.1	0
Total	$ 22	$ 17.6	$ 7.5
Public utilities, allowance for funds used during construction, rate	4.90%	4.70%	3.00%
Evergy Metro
Property, Plant and Equipment [Line Items]
AFUDC borrowed funds	$ 6	$ 6	$ 4.3
AFUDC equity funds	12.6	8	2.2
Total	$ 18.6	$ 14	$ 6.5
Public utilities, allowance for funds used during construction, rate	5.60%	5.20%	4.60%
Evergy Missouri West
Property, Plant and Equipment [Line Items]
Public utilities, allowance for funds used during construction, rate	2.60%	3.50%	3.70%

SUMMARY OF SIGNIFICANT ACCOUN_7

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Property, Plant and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Depreciation rates average	3.00%
Regulatory assets	$ 2,415.2	$ 2,074.4
Depreciation expense reflected in retail rates	$ 9
Minimum
Property, Plant and Equipment [Line Items]
Generating facilities	8 years
Transmission facilities	15 years
Distribution facilities	8 years
Other	5 years
Maximum
Property, Plant and Equipment [Line Items]
Generating facilities	87 years
Transmission facilities	94 years
Distribution facilities	73 years
Other	84 years
Evergy Kansas Central
Property, Plant and Equipment [Line Items]
Regulatory assets	$ 1,010.9	896.3
Evergy Kansas Central | Minimum
Property, Plant and Equipment [Line Items]
Generating facilities	8 years
Transmission facilities	36 years
Distribution facilities	19 years
Other	7 years
Evergy Kansas Central | Maximum
Property, Plant and Equipment [Line Items]
Generating facilities	87 years
Transmission facilities	94 years
Distribution facilities	73 years
Other	84 years
Evergy Metro
Property, Plant and Equipment [Line Items]
Regulatory assets	$ 497	615.5
Evergy Metro | Minimum
Property, Plant and Equipment [Line Items]
Generating facilities	20 years
Transmission facilities	15 years
Distribution facilities	8 years
Other	5 years
Evergy Metro | Maximum
Property, Plant and Equipment [Line Items]
Generating facilities	60 years
Transmission facilities	70 years
Distribution facilities	55 years
Other	50 years
Retired Generation Facilities
Property, Plant and Equipment [Line Items]
Regulatory assets	$ 123.4	128.4
Retired Generation Facilities | Evergy Kansas Central
Property, Plant and Equipment [Line Items]
Regulatory assets	0	0
Retired Generation Facilities | Evergy Metro
Property, Plant and Equipment [Line Items]
Regulatory assets	$ 0	$ 0

SUMMARY OF SIGNIFICANT ACCOUN_8

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Corporate-Owned Life Insurance (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Accounting Policies [Abstract]
Cash surrender value of policies	$ 1,363	$ 1,369.6
Borrowings against policies	(1,232.3)	(1,237.6)
Corporate-owned life insurance, net	$ 130.7	$ 132

SUMMARY OF SIGNIFICANT ACCOUN_9

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Other Income (Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Income Expense Net [Line Items]
Non-service cost component of net benefit cost	$ (55.6)	$ (58.6)	$ (55.6)
Other	(31.8)	(19.6)	(21.3)
Other expense	(87.4)	(78.2)	(76.9)
Evergy Kansas Central
Other Income Expense Net [Line Items]
Non-service cost component of net benefit cost	(15.6)	(21.2)	(20.1)
Other	(20.3)	(17.7)	(20)
Other expense	(35.9)	(38.9)	(40.1)
Evergy Metro
Other Income Expense Net [Line Items]
Non-service cost component of net benefit cost	(26.7)	(24.2)	(20.9)
Other	(2.7)	(1.3)	(0.5)
Other expense	$ (29.4)	$ (25.5)	$ (21.4)

SUMMARY OF SIGNIFICANT ACCOU_10

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income
Net income	$ 891.9	$ 630	$ 685.6
Less: Net income attributable to noncontrolling interests	12.2	11.7	15.7
Net income attributable to Evergy, Inc.	$ 879.7	$ 618.3	$ 669.9
Common Shares Outstanding
Weighted average number of common shares outstanding - basic (in shares)	229	227.2	239.5
Add: effect of dilutive securities (in shares)	0.6	0.3	0.4
Diluted average number of common shares outstanding (in shares)	229.6	227.5	239.9
Basic earnings per common share (in dollars per share)	$ 3.84	$ 2.72	$ 2.80
Diluted EPS (in dollars per share)	$ 3.83	$ 2.72	$ 2.79

SUMMARY OF SIGNIFICANT ACCOU_11

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Antidilutive Securities (Details) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	0	127,884	785

SUMMARY OF SIGNIFICANT ACCOU_12

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash paid for (received from):
Interest, net of amount capitalized	$ 356.9	$ 367.6	$ 329.5
Income taxes, net of refunds	(19.6)	(46.5)	(5.2)
Non-cash investing transactions:
Property, plant and equipment additions (reductions)	269.3	463.3	186
Non-cash financing transactions:
Issuance of stock for compensation and reinvested dividends	0.7	0.9	(0.3)
Variable Interest Entities
Cash paid for (received from):
Interest of VIEs	0.2	0.8	1.6
Evergy Kansas Central
Cash paid for (received from):
Interest, net of amount capitalized	149.3	157.5	143
Income taxes, net of refunds	37.5	4.7	29.9
Non-cash investing transactions:
Property, plant and equipment additions (reductions)	101.9	235.4	92.1
Evergy Kansas Central | Variable Interest Entities
Cash paid for (received from):
Interest of VIEs	0.2	0.8	1.6
Evergy Metro
Cash paid for (received from):
Interest, net of amount capitalized	110.8	109.9	118.4
Income taxes, net of refunds	36.6	4.8	77
Non-cash investing transactions:
Property, plant and equipment additions (reductions)	$ 102.2	$ 192.5	$ 80.7

SUMMARY OF SIGNIFICANT ACCOU_13

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Dividends Declared (Details) - USD ($) $ / shares in Units, $ in Millions	Feb. 02, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Feb. 01, 2022
Dividends Payable [Line Items]
Dividends declared on common stock (in dollars per share)		$ 2.178	$ 2.05	$ 1.93
Common Stock | Subsequent Event
Dividends Payable [Line Items]
Dividends declared on common stock (in dollars per share)	$ 0.5725
Evergy Kansas Central | Subsequent Event
Dividends Payable [Line Items]
Dividends Payable					$ 25

REVENUE (Details)

REVENUE (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 5,329.1	$ 4,781.6	$ 5,019.6
Other	257.6	131.8	128.2
Revenues	5,586.7	4,913.4	5,147.8
Evergy Kansas Central
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	2,705.2	2,369.4	2,444.3
Other	142.1	48.7	63.1
Revenues	2,847.3	2,418.1	2,507.4
Evergy Metro
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	1,799.7	1,623.8	1,742.9
Other	114	81.8	63.6
Revenues	1,913.7	1,705.6	1,806.5
Residential
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	1,918.3	1,909.2	1,908.1
Residential | Evergy Kansas Central
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	824.1	801.2	793.9
Residential | Evergy Metro
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	691.9	714.7	712.4
Commercial
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	1,681.3	1,641.7	1,781.6
Commercial | Evergy Kansas Central
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	694.1	665.6	709.1
Commercial | Evergy Metro
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	713.3	717.1	786.1
Industrial
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	597	588.7	621.6
Industrial | Evergy Kansas Central
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	391.7	379.9	401.3
Industrial | Evergy Metro
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	122	128.8	136.9
Other retail
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	33.1	38.5	47.1
Other retail | Evergy Kansas Central
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	17.1	17.7	21
Other retail | Evergy Metro
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	9.2	11.7	16.3
Total electric retail
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	4,229.7	4,178.1	4,358.4
Total electric retail | Evergy Kansas Central
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	1,927	1,864.4	1,925.3
Total electric retail | Evergy Metro
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	1,536.4	1,572.3	1,651.7
Wholesale
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	717.2	264	327.5
Wholesale | Evergy Kansas Central
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	453.1	215.4	239.9
Wholesale | Evergy Metro
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	242.6	35	70.9
Transmission
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	356.8	318.5	309.2
Transmission | Evergy Kansas Central
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	322.9	287.3	273.3
Transmission | Evergy Metro
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	17.1	13.9	17.5
Industrial steam and other
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	25.4	21	24.5
Industrial steam and other | Evergy Kansas Central
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	2.2	2.3	5.8
Industrial steam and other | Evergy Metro
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 3.6	$ 2.6	$ 2.8

RECEIVABLES (Details)

RECEIVABLES (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Other receivables	$ 160.7	$ 177.9
Allowance for credit losses	(32.9)	(19.3)	$ (10.5)
Total	221.6	273.9
Evergy Kansas Central
Accounts, Notes, Loans and Financing Receivable [Line Items]
Other receivables	178.5	175.7
Allowance for credit losses	(13)	(7.5)	(3.8)
Total	201.6	218.9
Evergy Metro
Accounts, Notes, Loans and Financing Receivable [Line Items]
Other receivables	15.7	21.9
Allowance for credit losses	(13.3)	(8.1)	$ (4.6)
Total	31	45
Customer accounts receivable | Billed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customer accounts receivable	13.7	5.3
Customer accounts receivable | Billed | Evergy Kansas Central
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customer accounts receivable	9.7	0
Customer accounts receivable | Billed | Evergy Metro
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customer accounts receivable	2.7	3.3
Customer accounts receivable | Unbilled
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customer accounts receivable	80.1	110
Customer accounts receivable | Unbilled | Evergy Kansas Central
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customer accounts receivable	26.4	50.7
Customer accounts receivable | Unbilled | Evergy Metro
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customer accounts receivable	$ 25.9	$ 27.9

RECEIVABLES - Narrative (Detail

RECEIVABLES - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Entity Information [Line Items]
Other receivables, contracts with customers	$ 63.7	$ 57.5
Accounts receivable pledged as collateral	319	360
Evergy Kansas Central
Entity Information [Line Items]
Other receivables, contracts with customers	62.6	49.9
Accounts receivable pledged as collateral	153	180
Evergy Metro
Entity Information [Line Items]
Other receivables, contracts with customers	0.5	6.9
Accounts receivable pledged as collateral	116	$ 130
Maximum amount of outstanding principal under receivables agreement	130
Borrowings From Mid October Through Mid June | Evergy Kansas Central
Entity Information [Line Items]
Maximum amount of outstanding principal under receivables agreement	185
Borrowing From Mid June Through Expiration | Evergy Missouri West
Entity Information [Line Items]
Maximum amount of outstanding principal under receivables agreement	65
Borrowings From Mid-November Through Mid-June | Evergy Missouri West
Entity Information [Line Items]
Maximum amount of outstanding principal under receivables agreement	50
Borrowing From Mid June Through Mid October | Evergy Kansas Central
Entity Information [Line Items]
Maximum amount of outstanding principal under receivables agreement	$ 200

RECEIVABLES - Allowance for Cre

RECEIVABLES - Allowance for Credit Loses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance January 1	$ 19.3	$ 10.5
Credit loss expense	28	24.9
Write-offs	(26.4)	(28.6)
Recoveries of prior write-offs	12	12.5
Ending balance December 31	32.9	19.3
Evergy Kansas Central
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance January 1	7.5	3.8
Credit loss expense	12	11.1
Write-offs	(11)	(10)
Recoveries of prior write-offs	4.5	2.6
Ending balance December 31	13	7.5
Evergy Metro
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance January 1	8.1	4.6
Credit loss expense	10.5	9
Write-offs	(10.6)	(12.4)
Recoveries of prior write-offs	5.3	6.9
Ending balance December 31	$ 13.3	$ 8.1

RECEIVABLES - Other Receivables

RECEIVABLES - Other Receivables (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Other receivables, contracts with customers	$ 63.7	$ 57.5
Evergy Kansas Central
Accounts, Notes, Loans and Financing Receivable [Line Items]
Other receivables, contracts with customers	62.6	49.9
Evergy Metro
Accounts, Notes, Loans and Financing Receivable [Line Items]
Other receivables, contracts with customers	$ 0.5	$ 6.9

RECEIVABLES - Pledged as Collat

RECEIVABLES - Pledged as Collateral (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable pledged as collateral	$ 319	$ 360
Evergy Kansas Central
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable pledged as collateral	153	180
Evergy Metro
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable pledged as collateral	$ 116	$ 130

RATE MATTERS AND REGULATION - N

RATE MATTERS AND REGULATION - Narrative (Details) $ in Millions	1 Months Ended						12 Months Ended
	Jan. 31, 2022USD ($)	Sep. 30, 2021MW	Jul. 31, 2021USD ($)	Jun. 30, 2021USD ($)	May 31, 2021USD ($)	Apr. 30, 2021USD ($)	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)
Regulatory Proceedings [Line Items]
Regulatory assets							$ 2,415.2	$ 2,074.4
Regulatory liabilities							2,775.7	2,664.9
Revenues probable of refund
Regulatory Proceedings [Line Items]
Regulatory liabilities							29.3	18.4
Purchase power agreement
Regulatory Proceedings [Line Items]
Regulatory liabilities							$ 5.8	6.3
Regulatory Liability, Amortization Period							5 years
Fuel recovery mechanisms
Regulatory Proceedings [Line Items]
Regulatory liabilities							$ 6.5	1.3
Regulatory Liability, Amortization Period							1 year
February 2021 winter weather event
Regulatory Proceedings [Line Items]
Regulatory liabilities							$ 65.1	0
Pension and post-retirement costs
Regulatory Proceedings [Line Items]
Regulatory assets							567.2	867.8
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided							494.6
Regulatory asset representing differences between pension and post retirement costs for GAAP and for ratemaking							219.7
February 2021 winter weather event
Regulatory Proceedings [Line Items]
Regulatory assets							403.1	0
Analog meter unrecovered investment
Regulatory Proceedings [Line Items]
Regulatory assets							18.4	24.1
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided							$ 10.1
Regulatory Asset, Amortization Period							5 years
Deferred customer programs
Regulatory Proceedings [Line Items]
Regulatory assets							$ 18.7	16.3
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided							12.3
Kansas property tax surcharge
Regulatory Proceedings [Line Items]
Regulatory assets							$ 39.6	28.9
Regulatory Asset, Amortization Period							1 year
Fuel recovery mechanisms
Regulatory Proceedings [Line Items]
Regulatory assets							$ 202.5	26.2
Regulatory Asset, Amortization Period							1 year
Evergy Kansas Central
Regulatory Proceedings [Line Items]
Regulatory assets							$ 1,010.9	896.3
Regulatory liabilities							1,482.2	1,472.9
Evergy Kansas Central | Revenues probable of refund
Regulatory Proceedings [Line Items]
Regulatory liabilities							0	0
Evergy Kansas Central | Purchase power agreement
Regulatory Proceedings [Line Items]
Regulatory liabilities							5.8	6.3
Evergy Kansas Central | Fuel recovery mechanisms
Regulatory Proceedings [Line Items]
Regulatory liabilities							0	0
Evergy Kansas Central | February 2021 winter weather event
Regulatory Proceedings [Line Items]
Regulatory liabilities							0	0
Evergy Kansas Central | Pension and post-retirement costs
Regulatory Proceedings [Line Items]
Regulatory assets							265.6	412.9
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided							265.6
Regulatory asset representing differences between pension and post retirement costs for GAAP and for ratemaking							(11.6)
Evergy Kansas Central | February 2021 winter weather event
Regulatory Proceedings [Line Items]
Regulatory assets							121.5	0
Evergy Kansas Central | Analog meter unrecovered investment
Regulatory Proceedings [Line Items]
Regulatory assets							18.4	24.1
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided							$ 10.1
Regulatory Asset, Amortization Period							5 years
Evergy Kansas Central | Deferred customer programs
Regulatory Proceedings [Line Items]
Regulatory assets							$ 6.4	5.7
Evergy Kansas Central | Kansas property tax surcharge
Regulatory Proceedings [Line Items]
Regulatory assets							31.6	23.7
Evergy Kansas Central | Fuel recovery mechanisms
Regulatory Proceedings [Line Items]
Regulatory assets							120.8	1.2
Evergy Metro
Regulatory Proceedings [Line Items]
Regulatory assets							497	615.5
Regulatory liabilities							1,008.8	907.4
Evergy Metro | Revenues probable of refund
Regulatory Proceedings [Line Items]
Regulatory liabilities							0	0
Evergy Metro | Purchase power agreement
Regulatory Proceedings [Line Items]
Regulatory liabilities							0	0
Evergy Metro | Fuel recovery mechanisms
Regulatory Proceedings [Line Items]
Regulatory liabilities							6.5	0
Evergy Metro | February 2021 winter weather event
Regulatory Proceedings [Line Items]
Regulatory liabilities							65.1	0
Evergy Metro | Pension and post-retirement costs
Regulatory Proceedings [Line Items]
Regulatory assets							213.3	359.9
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided							179
Regulatory asset representing differences between pension and post retirement costs for GAAP and for ratemaking							123.3
Evergy Metro | February 2021 winter weather event
Regulatory Proceedings [Line Items]
Regulatory assets							0	0
Evergy Metro | Analog meter unrecovered investment
Regulatory Proceedings [Line Items]
Regulatory assets							0	0
Evergy Metro | Deferred customer programs
Regulatory Proceedings [Line Items]
Regulatory assets							7.8	8.6
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided							7.8
Evergy Metro | Kansas property tax surcharge
Regulatory Proceedings [Line Items]
Regulatory assets							8	5.2
Evergy Metro | Fuel recovery mechanisms
Regulatory Proceedings [Line Items]
Regulatory assets							$ 19.8	$ 17.7
Evergy Metro | Missouri Public Service Commission
Regulatory Proceedings [Line Items]
Public Utilities, Recovery Mechanism Percent for Fuel Cost							0.95
Public Utilities, Recovery Mechanism's Sharing Percentage for Fuel Cost							0.05
Evergy Missouri West | Missouri Public Service Commission
Regulatory Proceedings [Line Items]
Public Utilities, Recovery Mechanism Percent for Fuel Cost							0.95
Public Utilities, Recovery Mechanism's Sharing Percentage for Fuel Cost							0.05
La Cygne Station | Evergy Kansas South Inc
Regulatory Proceedings [Line Items]
VIE ownership percentage							50.00%
Transmission delivery charge | Evergy Kansas Central | Kansas Corporation Commission
Regulatory Proceedings [Line Items]
Annual revenue increase (decrease) approved						$ 37.9
Transmission delivery charge | Evergy Metro | Kansas Corporation Commission
Regulatory Proceedings [Line Items]
Annual revenue increase (decrease) approved					$ (2.4)
2018 Rate Case Proceedings | Evergy Kansas Central | Kansas Corporation Commission
Regulatory Proceedings [Line Items]
Refund percent on earnings over approved return on equity							0.50
Approved return on equity, percentage							9.30%
Estimated refund on earnings over approved return on equity							$ 0
2018 Rate Case Proceedings | Evergy Metro | Kansas Corporation Commission
Regulatory Proceedings [Line Items]
Refund percent on earnings over approved return on equity							0.50
Approved return on equity, percentage							9.30%
Estimated refund on earnings over approved return on equity							$ 2
2018 MPSC OPC MECG Petition
Regulatory Proceedings [Line Items]
Estimated loss contingency portion not accrued (up to)							50
2018 MPSC OPC MECG Petition | Revenues probable of refund
Regulatory Proceedings [Line Items]
Regulatory liabilities							29.3
FERC 2022 TFR Proceeding | Evergy Kansas Central | Federal Energy Regulatory Commission
Regulatory Proceedings [Line Items]
Annual transmissions revenue estimated amount of increase (decrease) over prior year							33.2
FERC 2022 TFR Proceeding | Evergy Metro | Federal Energy Regulatory Commission
Regulatory Proceedings [Line Items]
Annual transmissions revenue estimated amount of increase (decrease) over prior year							18.1
FERC 2021 TFR Proceeding | Evergy Kansas Central | Federal Energy Regulatory Commission
Regulatory Proceedings [Line Items]
Annual transmissions revenue estimated amount of increase (decrease) over prior year							32.4
FERC 2021 TFR Proceeding | Evergy Metro | Federal Energy Regulatory Commission
Regulatory Proceedings [Line Items]
Annual transmissions revenue estimated amount of increase (decrease) over prior year							(3.9)
FERC 2020 TFR Proceeding | Evergy Kansas Central | Federal Energy Regulatory Commission
Regulatory Proceedings [Line Items]
Annual transmissions revenue estimated amount of increase (decrease) over prior year							6.8
FERC 2020 TFR Proceeding | Evergy Metro | Federal Energy Regulatory Commission
Regulatory Proceedings [Line Items]
Annual transmissions revenue estimated amount of increase (decrease) over prior year							(1.7)
2021 KCC Winter Weather AAO | Evergy Kansas Central | February 2021 winter weather event
Regulatory Proceedings [Line Items]
Regulatory assets							121.5
2021 KCC Winter Weather AAO | Evergy Metro
Regulatory Proceedings [Line Items]
Public Utilities, Requested Refund Increase (Decrease), Amount			$ (6)
2021 KCC Winter Weather AAO | Evergy Metro | February 2021 winter weather event
Regulatory Proceedings [Line Items]
Regulatory liabilities							39.5
2021 MPSC Winter Weather | Evergy Metro
Regulatory Proceedings [Line Items]
Public Utilities, Requested Refund Increase (Decrease), Amount				$ (5)
2021 MPSC Winter Weather | Evergy Metro | February 2021 winter weather event
Regulatory Proceedings [Line Items]
Regulatory liabilities							25.6
2021 MPSC Winter Weather | Evergy Missouri West
Regulatory Proceedings [Line Items]
Public Utilities Requested Increase of Recovery				$ 15
2021 MPSC Winter Weather | Evergy Missouri West | February 2021 winter weather event
Regulatory Proceedings [Line Items]
Regulatory assets							$ 281.6
Utility Financing and Securitization Act - KS | Evergy Kansas Central
Regulatory Proceedings [Line Items]
Planned Capacity of Investment in Renewable Generation | MW		190
Subsequent Event | 2022 Rate case proceedings | Evergy Metro
Regulatory Proceedings [Line Items]
Return on equity, requested	10.00%
Annual revenue increase (decrease), requested, not including rebasing fuel, purchased power expense and/or property tax expense	$ 43.9
Rate-making equity ratio, requested	51.19%
Annual revenue increase (decrease) related to rebasing, property tax and credit loss expense, storm reserve and return on unrecovered investment	$ 3.8
Subsequent Event | 2022 Rate case proceedings | Evergy Missouri West
Regulatory Proceedings [Line Items]
Return on equity, requested	10.00%
Annual revenue increase (decrease), requested, not including rebasing fuel, purchased power expense and/or property tax expense	$ 27.7
Rate-making equity ratio, requested	51.81%
Annual revenue increase (decrease) related to rebasing, property tax and credit loss expense, storm reserve and return on unrecovered investment	$ 32.1

RATE MATTERS AND REGULATION - R

RATE MATTERS AND REGULATION - Regulatory Matters Asset (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Regulatory Assets [Line Items]
Regulatory Assets	$ 2,415.2	$ 2,074.4
Less: current portion	(424.1)	(206.2)
Total noncurrent regulatory assets	1,991.1	1,868.2
Pension and post-retirement costs
Regulatory Assets [Line Items]
Regulatory Assets	567.2	867.8
Debt reacquisition costs
Regulatory Assets [Line Items]
Regulatory Assets	94.4	98.9
Debt fair value adjustment
Regulatory Assets [Line Items]
Regulatory Assets	96.5	104
Asset retirement obligations fair value adjustment
Regulatory Assets [Line Items]
Regulatory Assets	117.9	116.2
Depreciation
Regulatory Assets [Line Items]
Regulatory Assets	98.5	70
Cost of removal
Regulatory Assets [Line Items]
Regulatory Assets	257.5	183.4
Asset retirement obligations
Regulatory Assets [Line Items]
Regulatory Assets	119.3	170.8
Analog meter unrecovered investment
Regulatory Assets [Line Items]
Regulatory Assets	18.4	24.1
Treasury yield hedges
Regulatory Assets [Line Items]
Regulatory Assets	20.4	21.5
Iatan No. 1 and common facilities
Regulatory Assets [Line Items]
Regulatory Assets	6.5	6.9
Iatan No. 2 construction accounting costs
Regulatory Assets [Line Items]
Regulatory Assets	24.7	25.4
Kansas property tax surcharge
Regulatory Assets [Line Items]
Regulatory Assets	39.6	28.9
Disallowed plant costs
Regulatory Assets [Line Items]
Regulatory Assets	14.2	14.5
La Cygne environmental costs
Regulatory Assets [Line Items]
Regulatory Assets	11.2	12.4
Deferred customer programs
Regulatory Assets [Line Items]
Regulatory Assets	18.7	16.3
Fuel recovery mechanisms
Regulatory Assets [Line Items]
Regulatory Assets	202.5	26.2
February 2021 winter weather event
Regulatory Assets [Line Items]
Regulatory Assets	403.1	0
Solar rebates
Regulatory Assets [Line Items]
Regulatory Assets	20.2	25.9
Wolf Creek outage
Regulatory Assets [Line Items]
Regulatory Assets	20.4	10
Pension and other post-retirement benefit non-service costs
Regulatory Assets [Line Items]
Regulatory Assets	65.6	49.8
Retired generation facilities
Regulatory Assets [Line Items]
Regulatory Assets	123.4	128.4
Merger transition costs
Regulatory Assets [Line Items]
Regulatory Assets	32.7	37.6
Other regulatory liabilities
Regulatory Assets [Line Items]
Regulatory Assets	42.3	35.4
Evergy Kansas Central
Regulatory Assets [Line Items]
Regulatory Assets	1,010.9	896.3
Less: current portion	(257.3)	(96.2)
Total noncurrent regulatory assets	753.6	800.1
Evergy Kansas Central | Pension and post-retirement costs
Regulatory Assets [Line Items]
Regulatory Assets	265.6	412.9
Evergy Kansas Central | Debt reacquisition costs
Regulatory Assets [Line Items]
Regulatory Assets	86.7	91.3
Evergy Kansas Central | Debt fair value adjustment
Regulatory Assets [Line Items]
Regulatory Assets	0	0
Evergy Kansas Central | Asset retirement obligations fair value adjustment
Regulatory Assets [Line Items]
Regulatory Assets	0	0
Evergy Kansas Central | Depreciation
Regulatory Assets [Line Items]
Regulatory Assets	50.1	52.7
Evergy Kansas Central | Cost of removal
Regulatory Assets [Line Items]
Regulatory Assets	141	125.7
Evergy Kansas Central | Asset retirement obligations
Regulatory Assets [Line Items]
Regulatory Assets	52.3	55
Evergy Kansas Central | Analog meter unrecovered investment
Regulatory Assets [Line Items]
Regulatory Assets	18.4	24.1
Evergy Kansas Central | Treasury yield hedges
Regulatory Assets [Line Items]
Regulatory Assets	20.4	21.5
Evergy Kansas Central | Iatan No. 1 and common facilities
Regulatory Assets [Line Items]
Regulatory Assets	0	0
Evergy Kansas Central | Iatan No. 2 construction accounting costs
Regulatory Assets [Line Items]
Regulatory Assets	0	0
Evergy Kansas Central | Kansas property tax surcharge
Regulatory Assets [Line Items]
Regulatory Assets	31.6	23.7
Evergy Kansas Central | Disallowed plant costs
Regulatory Assets [Line Items]
Regulatory Assets	14.2	14.5
Evergy Kansas Central | La Cygne environmental costs
Regulatory Assets [Line Items]
Regulatory Assets	9	10.1
Evergy Kansas Central | Deferred customer programs
Regulatory Assets [Line Items]
Regulatory Assets	6.4	5.7
Evergy Kansas Central | Fuel recovery mechanisms
Regulatory Assets [Line Items]
Regulatory Assets	120.8	1.2
Evergy Kansas Central | February 2021 winter weather event
Regulatory Assets [Line Items]
Regulatory Assets	121.5	0
Evergy Kansas Central | Solar rebates
Regulatory Assets [Line Items]
Regulatory Assets	0	0
Evergy Kansas Central | Wolf Creek outage
Regulatory Assets [Line Items]
Regulatory Assets	10.2	5
Evergy Kansas Central | Pension and other post-retirement benefit non-service costs
Regulatory Assets [Line Items]
Regulatory Assets	23	12.8
Evergy Kansas Central | Retired generation facilities
Regulatory Assets [Line Items]
Regulatory Assets	0	0
Evergy Kansas Central | Merger transition costs
Regulatory Assets [Line Items]
Regulatory Assets	15.6	18
Evergy Kansas Central | Other regulatory liabilities
Regulatory Assets [Line Items]
Regulatory Assets	24.1	22.1
Evergy Metro
Regulatory Assets [Line Items]
Regulatory Assets	497	615.5
Less: current portion	(86.3)	(82)
Total noncurrent regulatory assets	410.7	533.5
Evergy Metro | Pension and post-retirement costs
Regulatory Assets [Line Items]
Regulatory Assets	213.3	359.9
Evergy Metro | Debt reacquisition costs
Regulatory Assets [Line Items]
Regulatory Assets	6.7	6.8
Evergy Metro | Debt fair value adjustment
Regulatory Assets [Line Items]
Regulatory Assets	0	0
Evergy Metro | Asset retirement obligations fair value adjustment
Regulatory Assets [Line Items]
Regulatory Assets	0	0
Evergy Metro | Depreciation
Regulatory Assets [Line Items]
Regulatory Assets	27	9.4
Evergy Metro | Cost of removal
Regulatory Assets [Line Items]
Regulatory Assets	90.2	57.7
Evergy Metro | Asset retirement obligations
Regulatory Assets [Line Items]
Regulatory Assets	49.1	84
Evergy Metro | Analog meter unrecovered investment
Regulatory Assets [Line Items]
Regulatory Assets	0	0
Evergy Metro | Treasury yield hedges
Regulatory Assets [Line Items]
Regulatory Assets	0	0
Evergy Metro | Iatan No. 1 and common facilities
Regulatory Assets [Line Items]
Regulatory Assets	2.7	2.8
Evergy Metro | Iatan No. 2 construction accounting costs
Regulatory Assets [Line Items]
Regulatory Assets	12.4	12.7
Evergy Metro | Kansas property tax surcharge
Regulatory Assets [Line Items]
Regulatory Assets	8	5.2
Evergy Metro | Disallowed plant costs
Regulatory Assets [Line Items]
Regulatory Assets	0	0
Evergy Metro | La Cygne environmental costs
Regulatory Assets [Line Items]
Regulatory Assets	2.2	2.3
Evergy Metro | Deferred customer programs
Regulatory Assets [Line Items]
Regulatory Assets	7.8	8.6
Evergy Metro | Fuel recovery mechanisms
Regulatory Assets [Line Items]
Regulatory Assets	19.8	17.7
Evergy Metro | February 2021 winter weather event
Regulatory Assets [Line Items]
Regulatory Assets	0	0
Evergy Metro | Solar rebates
Regulatory Assets [Line Items]
Regulatory Assets	0	1.5
Evergy Metro | Wolf Creek outage
Regulatory Assets [Line Items]
Regulatory Assets	10.2	5
Evergy Metro | Pension and other post-retirement benefit non-service costs
Regulatory Assets [Line Items]
Regulatory Assets	29.6	23.4
Evergy Metro | Retired generation facilities
Regulatory Assets [Line Items]
Regulatory Assets	0	0
Evergy Metro | Merger transition costs
Regulatory Assets [Line Items]
Regulatory Assets	12.1	13.9
Evergy Metro | Other regulatory liabilities
Regulatory Assets [Line Items]
Regulatory Assets	$ 5.9	$ 4.6

RATE MATTERS AND REGULATION -_2

RATE MATTERS AND REGULATION - Regulatory Matters Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Regulatory Liabilities [Line Items]
Regulatory liabilities	$ 2,775.7	$ 2,664.9
Less: current portion	(70.7)	(26.1)
Total noncurrent regulatory liabilities	2,705	2,638.8
Taxes refundable through future rates
Regulatory Liabilities [Line Items]
Regulatory liabilities	1,969.5	2,055.7
Deferred regulatory gain from sale leaseback
Regulatory Liabilities [Line Items]
Regulatory liabilities	42.6	48.1
Emission allowances
Regulatory Liabilities [Line Items]
Regulatory liabilities	42.1	46.1
Nuclear decommissioning
Regulatory Liabilities [Line Items]
Regulatory liabilities	400.1	319.7
Pension and post-retirement costs
Regulatory Liabilities [Line Items]
Regulatory liabilities	44.4	50.8
Jurisdictional allowance for funds used during construction
Regulatory Liabilities [Line Items]
Regulatory liabilities	27.5	28.7
La Cygne leasehold dismantling costs
Regulatory Liabilities [Line Items]
Regulatory liabilities	29.6	29.6
Cost of removal
Regulatory Liabilities [Line Items]
Regulatory liabilities	0	4.4
Kansas tax credits
Regulatory Liabilities [Line Items]
Regulatory liabilities	16.7	0
Purchase power agreement
Regulatory Liabilities [Line Items]
Regulatory liabilities	5.8	6.3
Fuel recovery mechanisms
Regulatory Liabilities [Line Items]
Regulatory liabilities	6.5	1.3
February 2021 winter weather event
Regulatory Liabilities [Line Items]
Regulatory liabilities	65.1	0
Sibley AAO
Regulatory Liabilities [Line Items]
Regulatory liabilities	29.3	18.4
Other regulatory liabilities
Regulatory Liabilities [Line Items]
Regulatory liabilities	96.5	55.8
Evergy Kansas Central
Regulatory Liabilities [Line Items]
Regulatory liabilities	1,482.2	1,472.9
Less: current portion	(12.8)	(11.9)
Total noncurrent regulatory liabilities	1,469.4	1,461
Evergy Kansas Central | Taxes refundable through future rates
Regulatory Liabilities [Line Items]
Regulatory liabilities	1,143.7	1,184.5
Evergy Kansas Central | Deferred regulatory gain from sale leaseback
Regulatory Liabilities [Line Items]
Regulatory liabilities	42.6	48.1
Evergy Kansas Central | Emission allowances
Regulatory Liabilities [Line Items]
Regulatory liabilities	0	0
Evergy Kansas Central | Nuclear decommissioning
Regulatory Liabilities [Line Items]
Regulatory liabilities	175.7	138.2
Evergy Kansas Central | Pension and post-retirement costs
Regulatory Liabilities [Line Items]
Regulatory liabilities	23.2	31.4
Evergy Kansas Central | Jurisdictional allowance for funds used during construction
Regulatory Liabilities [Line Items]
Regulatory liabilities	25.8	27
Evergy Kansas Central | La Cygne leasehold dismantling costs
Regulatory Liabilities [Line Items]
Regulatory liabilities	29.6	29.6
Evergy Kansas Central | Cost of removal
Regulatory Liabilities [Line Items]
Regulatory liabilities	0	0
Evergy Kansas Central | Kansas tax credits
Regulatory Liabilities [Line Items]
Regulatory liabilities	16.7	0
Evergy Kansas Central | Purchase power agreement
Regulatory Liabilities [Line Items]
Regulatory liabilities	5.8	6.3
Evergy Kansas Central | Fuel recovery mechanisms
Regulatory Liabilities [Line Items]
Regulatory liabilities	0	0
Evergy Kansas Central | February 2021 winter weather event
Regulatory Liabilities [Line Items]
Regulatory liabilities	0	0
Evergy Kansas Central | Sibley AAO
Regulatory Liabilities [Line Items]
Regulatory liabilities	0	0
Evergy Kansas Central | Other regulatory liabilities
Regulatory Liabilities [Line Items]
Regulatory liabilities	19.1	7.8
Evergy Metro
Regulatory Liabilities [Line Items]
Regulatory liabilities	1,008.8	907.4
Less: current portion	(54.6)	(8)
Total noncurrent regulatory liabilities	954.2	899.4
Evergy Metro | Taxes refundable through future rates
Regulatory Liabilities [Line Items]
Regulatory liabilities	616.1	650.2
Evergy Metro | Deferred regulatory gain from sale leaseback
Regulatory Liabilities [Line Items]
Regulatory liabilities	0	0
Evergy Metro | Emission allowances
Regulatory Liabilities [Line Items]
Regulatory liabilities	42.1	46.1
Evergy Metro | Nuclear decommissioning
Regulatory Liabilities [Line Items]
Regulatory liabilities	224.4	181.5
Evergy Metro | Pension and post-retirement costs
Regulatory Liabilities [Line Items]
Regulatory liabilities	15.9	13.1
Evergy Metro | Jurisdictional allowance for funds used during construction
Regulatory Liabilities [Line Items]
Regulatory liabilities	1.7	1.7
Evergy Metro | La Cygne leasehold dismantling costs
Regulatory Liabilities [Line Items]
Regulatory liabilities	0	0
Evergy Metro | Cost of removal
Regulatory Liabilities [Line Items]
Regulatory liabilities	0	0
Evergy Metro | Kansas tax credits
Regulatory Liabilities [Line Items]
Regulatory liabilities	0	0
Evergy Metro | Purchase power agreement
Regulatory Liabilities [Line Items]
Regulatory liabilities	0	0
Evergy Metro | Fuel recovery mechanisms
Regulatory Liabilities [Line Items]
Regulatory liabilities	6.5	0
Evergy Metro | February 2021 winter weather event
Regulatory Liabilities [Line Items]
Regulatory liabilities	65.1	0
Evergy Metro | Sibley AAO
Regulatory Liabilities [Line Items]
Regulatory liabilities	0	0
Evergy Metro | Other regulatory liabilities
Regulatory Liabilities [Line Items]
Regulatory liabilities	$ 37	$ 14.8

GOODWILL (Details)

GOODWILL (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021USD ($)reporting_unit	Dec. 31, 2020USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill | $	$ 2,336.6	$ 2,336.6
Number of reporting units | reporting_unit	1

ASSET RETIREMENT OBLIGATIONS (D

ASSET RETIREMENT OBLIGATIONS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2021
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning balance January 1	$ 941.9	$ 674.1
Revision in timing and/or estimates	13.5	249.3
Settlements	(38.7)	(18.4)
Accretion	43.4	36.9
Ending balance	960.1	941.9
Less: current portion	(19.5)	(40.2)
Asset retirement obligations	940.6	901.7
Evergy Kansas Central
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning balance January 1	427.2	272.9
Revision in timing and/or estimates	3.8	136.8
Settlements	(10.6)	(2.2)
Accretion	23.5	19.7
Ending balance	443.9	427.2
Less: current portion	(7.3)	(11.2)
Asset retirement obligations	436.6	416
Evergy Metro
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning balance January 1	378.9	253.6
Revision in timing and/or estimates	9.5	118.4
Settlements	(24.4)	(7.5)
Accretion	17	14.4
Ending balance	381	378.9
Less: current portion	(11)	(21.2)
Asset retirement obligations	$ 370	$ 357.7
Wolf Creek Unit
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Jointly owned utility plant, proportionate ownership share			94.00%	94.00%
Wolf Creek Unit | Evergy Kansas Central
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Jointly owned utility plant, proportionate ownership share			47.00%
Wolf Creek Unit | Evergy Metro
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Jointly owned utility plant, proportionate ownership share			47.00%	47.00%

ASSET RETIREMENT OBLIGATIONS -

ASSET RETIREMENT OBLIGATIONS - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)
Jointly Owned Utility Plant Interests [Line Items]
Increase to ARO to decommission Wolf Creek resulting from study	$ 259.1
Evergy Kansas Central
Jointly Owned Utility Plant Interests [Line Items]
Increase to ARO to decommission Wolf Creek resulting from study	140.7
Evergy Metro
Jointly Owned Utility Plant Interests [Line Items]
Increase to ARO to decommission Wolf Creek resulting from study	$ 118.4

PROPERTY, PLANT AND EQUIPMENT_2

PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Electric plant in service	$ 30,289.9	$ 28,914.8
Electric plant acquisition adjustment	724.3	724.3
Accumulated depreciation	(11,515.5)	(10,998.4)
Plant in service	19,498.7	18,640.7
Construction work in progress	1,350.6	1,153.5
Nuclear fuel, net	152.5	155.9
Plant to be retired, net	0.8	0.9
Property, plant and equipment, net	21,002.6	19,951
Variable Interest Entities
Property, Plant and Equipment [Line Items]
Electric plant in service	392.1	392.1
Accumulated depreciation	(244.3)	(237.2)
Property, plant and equipment, net	147.8	154.9
Evergy Kansas Central
Property, Plant and Equipment [Line Items]
Electric plant in service	14,686.3	14,095.1
Electric plant acquisition adjustment	724.3	724.3
Accumulated depreciation	(5,590.8)	(5,293.5)
Plant in service	9,819.8	9,525.9
Construction work in progress	652.2	589.1
Nuclear fuel, net	76.1	77.7
Plant to be retired, net	0.8	0.9
Property, plant and equipment, net	10,548.9	10,193.6
Evergy Kansas Central | Variable Interest Entities
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	147.8	154.9
Evergy Metro
Property, Plant and Equipment [Line Items]
Electric plant in service	11,656.9	11,161.8
Electric plant acquisition adjustment	0	0
Accumulated depreciation	(4,733.7)	(4,532.7)
Plant in service	6,923.2	6,629.1
Construction work in progress	475.3	433.9
Nuclear fuel, net	76.4	78.2
Plant to be retired, net	0	0
Property, plant and equipment, net	$ 7,474.9	$ 7,141.2

PROPERTY, PLANT AND EQUIPMENT -

PROPERTY, PLANT AND EQUIPMENT - Depreciation Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 813.6	$ 804.7	$ 786.3
Variable Interest Entities
Property, Plant and Equipment [Line Items]
Depreciation expense	7.1	7.1	7.1
Evergy Kansas Central
Property, Plant and Equipment [Line Items]
Depreciation expense	450.3	435.1	425.8
Evergy Metro
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 255.9	$ 269.5	$ 262.7

JOINTLY-OWNED ELECTRIC UTILIT_3

JOINTLY-OWNED ELECTRIC UTILITY PLANTS (Details) $ in Millions	Dec. 31, 2021USD ($)	Dec. 31, 2021Rate	Dec. 31, 2021MW	Dec. 31, 2021	Dec. 31, 2020USD ($)
Jointly Owned Utility Plant Interests [Line Items]
Nuclear fuel, net	$ 152.5				$ 155.9
Wolf Creek Unit
Jointly Owned Utility Plant Interests [Line Items]
Jointly owned utility plant, proportionate ownership share		94.00%		94.00%
Electric plant in service	4,078.7
Accumulated depreciation	2,040.2
Nuclear fuel, net	152.5
Construction work in progress	187.4
Accredited capacity | MW			1,108
La Cygne Units
Jointly Owned Utility Plant Interests [Line Items]
Jointly owned utility plant, proportionate ownership share | Rate		100.00%
Electric plant in service	2,219.1
Accumulated depreciation	816
Nuclear fuel, net	0
Construction work in progress	52.6
Accredited capacity | MW			1,426
Iatan No. 1 Unit
Jointly Owned Utility Plant Interests [Line Items]
Jointly owned utility plant, proportionate ownership share | Rate		88.00%
Electric plant in service	765.7
Accumulated depreciation	251.9
Nuclear fuel, net	0
Construction work in progress	4.4
Accredited capacity | MW			618
Iatan No. 2 Unit
Jointly Owned Utility Plant Interests [Line Items]
Jointly owned utility plant, proportionate ownership share | Rate		73.00%
Electric plant in service	1,405.9
Accumulated depreciation	480.3
Nuclear fuel, net	0
Construction work in progress	8.1
Accredited capacity | MW			640
Iatan Common
Jointly Owned Utility Plant Interests [Line Items]
Jointly owned utility plant, proportionate ownership share | Rate		79.00%
Electric plant in service	503.6
Accumulated depreciation	122.2
Nuclear fuel, net	0
Construction work in progress	7.4
Jeffrey Energy Center
Jointly Owned Utility Plant Interests [Line Items]
Jointly owned utility plant, proportionate ownership share | Rate		100.00%
Electric plant in service	2,521.1
Accumulated depreciation	1,036.7
Nuclear fuel, net	0
Construction work in progress	48.7
Accredited capacity | MW			2,191
State Line
Jointly Owned Utility Plant Interests [Line Items]
Jointly owned utility plant, proportionate ownership share | Rate		40.00%
Electric plant in service	115
Accumulated depreciation	85.2
Nuclear fuel, net	0
Construction work in progress	25.5
Accredited capacity | MW			200
Evergy Kansas Central
Jointly Owned Utility Plant Interests [Line Items]
Nuclear fuel, net	76.1				77.7
Evergy Kansas Central | Wolf Creek Unit
Jointly Owned Utility Plant Interests [Line Items]
Jointly owned utility plant, proportionate ownership share | Rate		47.00%
Electric plant in service	2,019.8
Accumulated depreciation	992.2
Nuclear fuel, net	76.1
Construction work in progress	83.6
Accredited capacity | MW			554
Evergy Kansas Central | La Cygne Units
Jointly Owned Utility Plant Interests [Line Items]
Jointly owned utility plant, proportionate ownership share | Rate		50.00%
Electric plant in service	1,047.4
Accumulated depreciation	475.2
Nuclear fuel, net	0
Construction work in progress	29
Accredited capacity | MW			713
Evergy Kansas Central | Jeffrey Energy Center
Jointly Owned Utility Plant Interests [Line Items]
Jointly owned utility plant, proportionate ownership share | Rate		92.00%
Electric plant in service	2,307.6
Accumulated depreciation	944.5
Nuclear fuel, net	0
Construction work in progress	44.9
Accredited capacity | MW			2,016
Evergy Kansas Central | State Line
Jointly Owned Utility Plant Interests [Line Items]
Jointly owned utility plant, proportionate ownership share | Rate		40.00%
Electric plant in service	115
Accumulated depreciation	85.2
Nuclear fuel, net	0
Construction work in progress	25.5
Accredited capacity | MW			200
Evergy Metro
Jointly Owned Utility Plant Interests [Line Items]
Nuclear fuel, net	76.4				$ 78.2
Evergy Metro | Wolf Creek Unit
Jointly Owned Utility Plant Interests [Line Items]
Jointly owned utility plant, proportionate ownership share		47.00%		47.00%
Electric plant in service	2,058.9
Accumulated depreciation	1,048
Nuclear fuel, net	76.4
Construction work in progress	103.8
Accredited capacity | MW			554
Evergy Metro | La Cygne Units
Jointly Owned Utility Plant Interests [Line Items]
Jointly owned utility plant, proportionate ownership share | Rate		50.00%
Electric plant in service	1,171.7
Accumulated depreciation	340.8
Nuclear fuel, net	0
Construction work in progress	23.6
Accredited capacity | MW			713
Evergy Metro | Iatan No. 1 Unit
Jointly Owned Utility Plant Interests [Line Items]
Jointly owned utility plant, proportionate ownership share | Rate		70.00%
Electric plant in service	594.8
Accumulated depreciation	205.3
Nuclear fuel, net	0
Construction work in progress	3.6
Accredited capacity | MW			492
Evergy Metro | Iatan No. 2 Unit
Jointly Owned Utility Plant Interests [Line Items]
Jointly owned utility plant, proportionate ownership share | Rate		55.00%
Electric plant in service	1,066.4
Accumulated depreciation	412.5
Nuclear fuel, net	0
Construction work in progress	6.1
Accredited capacity | MW			482
Evergy Metro | Iatan Common
Jointly Owned Utility Plant Interests [Line Items]
Jointly owned utility plant, proportionate ownership share | Rate		61.00%
Electric plant in service	399.6
Accumulated depreciation	103.3
Nuclear fuel, net	0
Construction work in progress	$ 5.5
Subsidiaries | La Cygne Unit 2
Jointly Owned Utility Plant Interests [Line Items]
Leasehold interest percentage				50.00%
Subsidiaries | Evergy Kansas Central | La Cygne Unit 2
Jointly Owned Utility Plant Interests [Line Items]
Leasehold interest percentage				50.00%

PENSION PLANS AND POST-RETIRE_3

PENSION PLANS AND POST-RETIREMENT BENEFITS - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021USD ($)Rate	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2021	Dec. 31, 2021USD ($)
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Settlement and special termination benefits	$ 34.3	$ 11.2	$ 15.6
Non-qualified benefit obligations		52.1			$ 49.2
Funded by trusts containing assets		$ 46.3			44.2
Contributions to plans remainder of year					92.9
Defined benefit plan basis point change in discount rate		70
Post-Retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Settlement and special termination benefits	0	$ 0	0
Contributions to plans remainder of year					2.2
Evergy Kansas Central | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Settlement and special termination benefits	25.6	0	0
Non-qualified benefit obligations		27			25.4
Funded by trusts containing assets		$ 32.7			31.7
Contributions to plans remainder of year					30.6
Defined benefit plan basis point change in discount rate		70
Evergy Kansas Central | Post-Retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Settlement and special termination benefits	0	$ 0	0
Contributions to plans remainder of year					0.5
Evergy Metro | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Settlement and special termination benefits	13.7	$ 14.3	23
Contributions to plans remainder of year					62.3
Defined benefit plan basis point change in discount rate		70
Evergy Metro | Post-Retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Settlement and special termination benefits	$ 0	$ 0	$ 0
Contributions to plans remainder of year					$ 1.7
Wolf Creek
Defined Benefit Plan Disclosure [Line Items]
Jointly owned utility plant, proportionate ownership share	94.00%			94.00%
Wolf Creek | Evergy Kansas Central
Defined Benefit Plan Disclosure [Line Items]
Jointly owned utility plant, proportionate ownership share | Rate	47.00%
Wolf Creek | Evergy Kansas South Inc
Defined Benefit Plan Disclosure [Line Items]
Jointly owned utility plant, proportionate ownership share				47.00%
Wolf Creek | Evergy Metro
Defined Benefit Plan Disclosure [Line Items]
Jointly owned utility plant, proportionate ownership share	47.00%			47.00%

PENSION PLANS AND POST-RETIRE_4

PENSION PLANS AND POST-RETIREMENT BENEFITS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Benefits
Components of net periodic benefit costs
Defined benefit plan, benefit obligation, beginning of the year	$ 2,901.1	$ 2,718.2
Service cost	82.6	78.9	$ 79.1
Interest cost	84.2	96.8	108
Contribution by participants	0	0
Plan amendments		4.2
Actuarial gain (loss)	(119)	273.9
Benefits paid	(93.5)	(202.5)
Settlements	(284)	(62.9)
Other	(9.7)	(5.5)
Defined benefit plan, benefit obligation, end of the year	2,561.7	2,901.1	2,718.2
Change in plan assets
Fair value of plan assets, beginning of the year	1,799.1	1,732.8
Actual return on plan assets	145.5	209.9
Contributions by employer and participants	148.7	123.4
Benefits paid	(89.4)	(198.6)
Settlements	(279.5)	(62.9)
Other	(9.7)	(5.5)
Fair value of plan assets, end of the year	1,714.7	1,799.1	1,732.8
Funded status at end of year	(847)	(1,102)
Amounts recognized in the consolidated balance sheets
Non-current asset	0	0
Current pension and other post-retirement liability	(4.4)	(4.4)
Noncurrent pension liability and other post-retirement liability	(842.6)	(1,097.6)
Net amount recognized before regulatory treatment	(847)	(1,102)
Accumulated OCI or regulatory asset/liability	317.2	566.9
Net amount recognized at December 31, 2021	(529.8)	(535.1)
Amounts in accumulated OCI or regulatory asset/liability not yet recognized as a component of net periodic benefit cost:
Accumulated OCI or regulatory asset/liability	317.2	566.9
Pension Benefits | Evergy Kansas Central
Components of net periodic benefit costs
Defined benefit plan, benefit obligation, beginning of the year	1,429.6	1,323.4
Service cost	29.1	27.1	29
Interest cost	41	47	53.7
Contribution by participants	0	0
Plan amendments		8.1
Actuarial gain (loss)	(50)	127
Benefits paid	(54.8)	(102.3)
Settlements	(126.2)	0
Other	(4.3)	(0.7)
Defined benefit plan, benefit obligation, end of the year	1,264.4	1,429.6	1,323.4
Change in plan assets
Fair value of plan assets, beginning of the year	887	842.1
Actual return on plan assets	83.4	99.7
Contributions by employer and participants	46.5	45.8
Benefits paid	(52.3)	(99.9)
Settlements	(124.6)	0
Other	(4.3)	(0.7)
Fair value of plan assets, end of the year	835.7	887	842.1
Funded status at end of year	(428.7)	(542.6)
Amounts recognized in the consolidated balance sheets
Non-current asset	0	0
Current pension and other post-retirement liability	(2.4)	(2.5)
Noncurrent pension liability and other post-retirement liability	(426.3)	(540.1)
Net amount recognized before regulatory treatment	(428.7)	(542.6)
Accumulated OCI or regulatory asset/liability	263.6	408
Net amount recognized at December 31, 2021	(165.1)	(134.6)
Amounts in accumulated OCI or regulatory asset/liability not yet recognized as a component of net periodic benefit cost:
Accumulated OCI or regulatory asset/liability	263.6	408
Pension Benefits | Evergy Metro
Components of net periodic benefit costs
Defined benefit plan, benefit obligation, beginning of the year	1,446.5	1,371.4
Service cost	53.5	51.8	50.1
Interest cost	42.5	49.1	53.3
Contribution by participants	0	0
Plan amendments		(3.9)
Actuarial gain (loss)	(68.3)	144.8
Benefits paid	(37.5)	(99)
Settlements	(157.8)	(62.9)
Other	(5.4)	(4.8)
Defined benefit plan, benefit obligation, end of the year	1,273.5	1,446.5	1,371.4
Change in plan assets
Fair value of plan assets, beginning of the year	912.1	890.7
Actual return on plan assets	62.1	110.2
Contributions by employer and participants	102.2	77.6
Benefits paid	(37.1)	(98.7)
Settlements	(154.9)	(62.9)
Other	(5.4)	(4.8)
Fair value of plan assets, end of the year	879	912.1	890.7
Funded status at end of year	(394.5)	(534.4)
Amounts recognized in the consolidated balance sheets
Non-current asset	0	0
Current pension and other post-retirement liability	(0.7)	(0.8)
Noncurrent pension liability and other post-retirement liability	(393.8)	(533.6)
Net amount recognized before regulatory treatment	(394.5)	(534.4)
Accumulated OCI or regulatory asset/liability	84.6	216.9
Net amount recognized at December 31, 2021	(309.9)	(317.5)
Amounts in accumulated OCI or regulatory asset/liability not yet recognized as a component of net periodic benefit cost:
Accumulated OCI or regulatory asset/liability	84.6	216.9
Post-Retirement Benefits
Components of net periodic benefit costs
Defined benefit plan, benefit obligation, beginning of the year	280.4	264.3
Service cost	3.3	2.7	2.5
Interest cost	7.8	9.2	10.5
Contribution by participants	9	9.3
Plan amendments		1
Actuarial gain (loss)	(17.2)	19.6
Benefits paid	(24.9)	(25.7)
Settlements	0	0
Other	0	0
Defined benefit plan, benefit obligation, end of the year	258.4	280.4	264.3
Change in plan assets
Fair value of plan assets, beginning of the year	248.3	239.9
Actual return on plan assets	5.2	20.7
Contributions by employer and participants	11.8	11.7
Benefits paid	(23)	(24)
Settlements	0	0
Other	0	0
Fair value of plan assets, end of the year	242.3	248.3	239.9
Funded status at end of year	(16.1)	(32.1)
Amounts recognized in the consolidated balance sheets
Non-current asset	21.5	21.3
Current pension and other post-retirement liability	(1.1)	(1.6)
Noncurrent pension liability and other post-retirement liability	(36.5)	(51.8)
Net amount recognized before regulatory treatment	(16.1)	(32.1)
Accumulated OCI or regulatory asset/liability	(11.4)	4
Net amount recognized at December 31, 2021	(27.5)	(28.1)
Amounts in accumulated OCI or regulatory asset/liability not yet recognized as a component of net periodic benefit cost:
Accumulated OCI or regulatory asset/liability	(11.4)	4
Post-Retirement Benefits | Evergy Kansas Central
Components of net periodic benefit costs
Defined benefit plan, benefit obligation, beginning of the year	146.8	138.7
Service cost	1.7	1.1	1.1
Interest cost	4	4.8	5.6
Contribution by participants	1.4	1.8
Plan amendments		0.5
Actuarial gain (loss)	(9.4)	11
Benefits paid	(10.6)	(11.1)
Settlements	0	0
Other	0	0
Defined benefit plan, benefit obligation, end of the year	133.9	146.8	138.7
Change in plan assets
Fair value of plan assets, beginning of the year	125.8	120.5
Actual return on plan assets	6.5	13.7
Contributions by employer and participants	1.7	2.1
Benefits paid	(10)	(10.5)
Settlements	0	0
Other	0	0
Fair value of plan assets, end of the year	124	125.8	120.5
Funded status at end of year	(9.9)	(21)
Amounts recognized in the consolidated balance sheets
Non-current asset	0	0
Current pension and other post-retirement liability	(0.6)	(0.8)
Noncurrent pension liability and other post-retirement liability	(9.3)	(20.2)
Net amount recognized before regulatory treatment	(9.9)	(21)
Accumulated OCI or regulatory asset/liability	(9.6)	1
Net amount recognized at December 31, 2021	(19.5)	(20)
Amounts in accumulated OCI or regulatory asset/liability not yet recognized as a component of net periodic benefit cost:
Accumulated OCI or regulatory asset/liability	(9.6)	1
Post-Retirement Benefits | Evergy Metro
Components of net periodic benefit costs
Defined benefit plan, benefit obligation, beginning of the year	133.6	125.6
Service cost	1.6	1.6	1.4
Interest cost	3.8	4.4	4.9
Contribution by participants	7.6	7.5
Plan amendments		0.5
Actuarial gain (loss)	(7.8)	8.6
Benefits paid	(14.3)	(14.6)
Settlements	0	0
Other	0	0
Defined benefit plan, benefit obligation, end of the year	124.5	133.6	125.6
Change in plan assets
Fair value of plan assets, beginning of the year	122.5	119.4
Actual return on plan assets	(1.3)	7
Contributions by employer and participants	10.1	9.6
Benefits paid	(13)	(13.5)
Settlements	0	0
Other	0	0
Fair value of plan assets, end of the year	118.3	122.5	$ 119.4
Funded status at end of year	(6.2)	(11.1)
Amounts recognized in the consolidated balance sheets
Non-current asset	21.5	21.3
Current pension and other post-retirement liability	(0.6)	(0.9)
Noncurrent pension liability and other post-retirement liability	(27.1)	(31.5)
Net amount recognized before regulatory treatment	(6.2)	(11.1)
Accumulated OCI or regulatory asset/liability	(10.5)	(7.7)
Net amount recognized at December 31, 2021	(16.7)	(18.8)
Amounts in accumulated OCI or regulatory asset/liability not yet recognized as a component of net periodic benefit cost:
Accumulated OCI or regulatory asset/liability	(10.5)	(7.7)
Actuarial (gain) loss | Pension Benefits
Amounts in accumulated OCI or regulatory asset/liability not yet recognized as a component of net periodic benefit cost:
Actuarial (gain) loss	302.4	551.8
Actuarial (gain) loss | Pension Benefits | Evergy Kansas Central
Amounts in accumulated OCI or regulatory asset/liability not yet recognized as a component of net periodic benefit cost:
Actuarial (gain) loss	246.6	388.9
Actuarial (gain) loss | Pension Benefits | Evergy Metro
Amounts in accumulated OCI or regulatory asset/liability not yet recognized as a component of net periodic benefit cost:
Actuarial (gain) loss	86.4	218.6
Actuarial (gain) loss | Post-Retirement Benefits
Amounts in accumulated OCI or regulatory asset/liability not yet recognized as a component of net periodic benefit cost:
Actuarial (gain) loss	(12.6)	2.2
Actuarial (gain) loss | Post-Retirement Benefits | Evergy Kansas Central
Amounts in accumulated OCI or regulatory asset/liability not yet recognized as a component of net periodic benefit cost:
Actuarial (gain) loss	(10.5)	(0.3)
Actuarial (gain) loss | Post-Retirement Benefits | Evergy Metro
Amounts in accumulated OCI or regulatory asset/liability not yet recognized as a component of net periodic benefit cost:
Actuarial (gain) loss	(3.8)	0
Prior service cost | Pension Benefits
Amounts in accumulated OCI or regulatory asset/liability not yet recognized as a component of net periodic benefit cost:
Prior service cost	14.8	15.1
Prior service cost | Pension Benefits | Evergy Kansas Central
Amounts in accumulated OCI or regulatory asset/liability not yet recognized as a component of net periodic benefit cost:
Prior service cost	17	19.1
Prior service cost | Pension Benefits | Evergy Metro
Amounts in accumulated OCI or regulatory asset/liability not yet recognized as a component of net periodic benefit cost:
Prior service cost	(1.8)	(1.7)
Prior service cost | Post-Retirement Benefits
Amounts in accumulated OCI or regulatory asset/liability not yet recognized as a component of net periodic benefit cost:
Prior service cost	1.2	1.8
Prior service cost | Post-Retirement Benefits | Evergy Kansas Central
Amounts in accumulated OCI or regulatory asset/liability not yet recognized as a component of net periodic benefit cost:
Prior service cost	0.9	1.3
Prior service cost | Post-Retirement Benefits | Evergy Metro
Amounts in accumulated OCI or regulatory asset/liability not yet recognized as a component of net periodic benefit cost:
Prior service cost	$ (6.7)	$ (7.7)

PENSION PLANS AND POST-RETIRE_5

PENSION PLANS AND POST-RETIREMENT BENEFITS PENSION PLANS AND POST-RETIREMENT BENEFITS - Schedule of Components of Net Periodic Benefit Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other changes in plan assets and benefit obligations recognized in OCI or regulatory assets/liabilities
Total recognized in OCI or regulatory asset/liability	$ (5.4)	$ (0.6)	$ 47
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	82.6	78.9	79.1
Interest cost	84.2	96.8	108
Expected return on plan assets	(103.5)	(105.6)	(106.3)
Prior service cost	2	1.8	1.9
Recognized net actuarial (gain) loss	54.1	46.4	33
Settlement and special termination benefits	34.3	11.2	15.6
Net periodic benefit costs before regulatory adjustment and intercompany allocations	153.7	129.5	131.3
Regulatory adjustment	17.3	29.6	37.4
Net periodic benefit costs (income)	171	159.1	168.7
Other changes in plan assets and benefit obligations recognized in OCI or regulatory assets/liabilities
Total recognized in OCI or regulatory asset/liability	(249.7)	112.8	34.2
Total recognized in net periodic benefit costs and OCI or regulatory asset/liability	(78.7)	271.9	202.9
Post-Retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	3.3	2.7	2.5
Interest cost	7.8	9.2	10.5
Expected return on plan assets	(8.9)	(9.3)	(10)
Prior service cost	0.5	0.5	0.5
Recognized net actuarial (gain) loss	1.4	0.2	(1.2)
Settlement and special termination benefits	0	0	0
Net periodic benefit costs before regulatory adjustment and intercompany allocations	4.1	3.3	2.3
Regulatory adjustment	(4.8)	(4)	(3.4)
Net periodic benefit costs (income)	(0.7)	(0.7)	(1.1)
Other changes in plan assets and benefit obligations recognized in OCI or regulatory assets/liabilities
Total recognized in OCI or regulatory asset/liability	(15.4)	8.4	1.6
Total recognized in net periodic benefit costs and OCI or regulatory asset/liability	(16.1)	7.7	0.5
Evergy Kansas Central | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	29.1	27.1	29
Interest cost	41	47	53.7
Expected return on plan assets	(52.8)	(53.1)	(54.8)
Prior service cost	2.1	1.6	1.7
Recognized net actuarial (gain) loss	36	33.9	25.5
Settlement and special termination benefits	25.6	0	0
Net periodic benefit costs before regulatory adjustment and intercompany allocations	81	56.5	55.1
Regulatory adjustment	(13.1)	5.9	3
Intercompany allocations	3.2	(0.2)	0
Net periodic benefit costs (income)	71.1	62.2	58.1
Other changes in plan assets and benefit obligations recognized in OCI or regulatory assets/liabilities
Total recognized in OCI or regulatory asset/liability	(144.4)	53.1	17.4
Total recognized in net periodic benefit costs and OCI or regulatory asset/liability	(73.3)	115.3	75.5
Evergy Kansas Central | Post-Retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	1.7	1.1	1.1
Interest cost	4	4.8	5.6
Expected return on plan assets	(6.3)	(6.6)	(6.7)
Prior service cost	0.5	0.5	0.5
Recognized net actuarial (gain) loss	0.6	0	(0.6)
Settlement and special termination benefits	0	0	0
Net periodic benefit costs before regulatory adjustment and intercompany allocations	0.5	(0.2)	(0.1)
Regulatory adjustment	(3.3)	(3)	(3)
Intercompany allocations	0	0.1	0
Net periodic benefit costs (income)	(2.8)	(3.1)	(3.1)
Other changes in plan assets and benefit obligations recognized in OCI or regulatory assets/liabilities
Total recognized in OCI or regulatory asset/liability	(10.6)	3.9	(3.7)
Total recognized in net periodic benefit costs and OCI or regulatory asset/liability	(13.4)	0.8	(6.8)
Evergy Metro
Other changes in plan assets and benefit obligations recognized in OCI or regulatory assets/liabilities
Total recognized in OCI or regulatory asset/liability	0.3	0.2	(0.7)
Evergy Metro | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	53.5	51.8	50.1
Interest cost	42.5	49.1	53.3
Expected return on plan assets	(55.7)	(54.7)	(48.9)
Prior service cost	0	0.8	0.9
Recognized net actuarial (gain) loss	43.8	45.7	49.8
Settlement and special termination benefits	13.7	14.3	23
Net periodic benefit costs before regulatory adjustment and intercompany allocations	97.8	107	128.2
Regulatory adjustment	4.2	(11.6)	(19.2)
Intercompany allocations	(25.9)	(22.6)	(34.4)
Net periodic benefit costs (income)	76.1	72.8	74.6
Other changes in plan assets and benefit obligations recognized in OCI or regulatory assets/liabilities
Total recognized in OCI or regulatory asset/liability	(132.3)	24.6	(37.8)
Total recognized in net periodic benefit costs and OCI or regulatory asset/liability	(56.2)	97.4	36.8
Evergy Metro | Post-Retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	1.6	1.6	1.4
Interest cost	3.8	4.4	4.9
Expected return on plan assets	(2.6)	(2.7)	(3.3)
Prior service cost	(1)	0	0
Recognized net actuarial (gain) loss	(0.1)	(0.6)	(1.4)
Settlement and special termination benefits	0	0	0
Net periodic benefit costs before regulatory adjustment and intercompany allocations	1.7	2.7	1.6
Regulatory adjustment	0.4	(0.2)	0.4
Intercompany allocations	(0.4)	(0.3)	(0.4)
Net periodic benefit costs (income)	1.7	2.2	1.6
Other changes in plan assets and benefit obligations recognized in OCI or regulatory assets/liabilities
Total recognized in OCI or regulatory asset/liability	(2.8)	5.3	6.1
Total recognized in net periodic benefit costs and OCI or regulatory asset/liability	(1.1)	7.5	7.7
Actuarial (gain) loss | Pension Benefits
Other changes in plan assets and benefit obligations recognized in OCI or regulatory assets/liabilities
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(195.3)	169.7	84.7
Amounts reclassified from accumulated other comprehensive loss	(52.4)	(59.2)	(48.6)
Actuarial (gain) loss | Post-Retirement Benefits
Other changes in plan assets and benefit obligations recognized in OCI or regulatory assets/liabilities
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(13.6)	8.2	0.9
Amounts reclassified from accumulated other comprehensive loss	(1.3)	(0.2)	1.2
Actuarial (gain) loss | Evergy Kansas Central | Pension Benefits
Other changes in plan assets and benefit obligations recognized in OCI or regulatory assets/liabilities
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(106.3)	80.4	44.6
Amounts reclassified from accumulated other comprehensive loss	(36)	(33.8)	(25.5)
Actuarial (gain) loss | Evergy Kansas Central | Post-Retirement Benefits
Other changes in plan assets and benefit obligations recognized in OCI or regulatory assets/liabilities
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(9.6)	3.9	(3.8)
Amounts reclassified from accumulated other comprehensive loss	(0.5)	0	0.6
Actuarial (gain) loss | Evergy Metro | Pension Benefits
Other changes in plan assets and benefit obligations recognized in OCI or regulatory assets/liabilities
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(88.4)	89.3	35.9
Amounts reclassified from accumulated other comprehensive loss	(43.9)	(60)	(72.8)
Actuarial (gain) loss | Evergy Metro | Post-Retirement Benefits
Other changes in plan assets and benefit obligations recognized in OCI or regulatory assets/liabilities
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(3.9)	4.3	4.7
Amounts reclassified from accumulated other comprehensive loss	0.1	0.6	1.4
Prior service cost | Pension Benefits
Other changes in plan assets and benefit obligations recognized in OCI or regulatory assets/liabilities
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		4.1
Amounts reclassified from accumulated other comprehensive loss	(2)	(1.8)	(1.9)
Prior service cost | Post-Retirement Benefits
Other changes in plan assets and benefit obligations recognized in OCI or regulatory assets/liabilities
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		0.9
Amounts reclassified from accumulated other comprehensive loss	(0.5)	(0.5)	(0.5)
Prior service cost | Evergy Kansas Central | Pension Benefits
Other changes in plan assets and benefit obligations recognized in OCI or regulatory assets/liabilities
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		8.1
Amounts reclassified from accumulated other comprehensive loss	(2.1)	(1.6)	(1.7)
Prior service cost | Evergy Kansas Central | Post-Retirement Benefits
Other changes in plan assets and benefit obligations recognized in OCI or regulatory assets/liabilities
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		0.5
Amounts reclassified from accumulated other comprehensive loss	(0.5)	(0.5)	(0.5)
Prior service cost | Evergy Metro | Pension Benefits
Other changes in plan assets and benefit obligations recognized in OCI or regulatory assets/liabilities
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		(3.9)
Amounts reclassified from accumulated other comprehensive loss	0	(0.8)	(0.9)
Prior service cost | Evergy Metro | Post-Retirement Benefits
Other changes in plan assets and benefit obligations recognized in OCI or regulatory assets/liabilities
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		0.4
Amounts reclassified from accumulated other comprehensive loss	$ 1	$ 0	$ 0

PENSION PLANS AND POST-RETIRE_6

PENSION PLANS AND POST-RETIREMENT BENEFITS - APBO (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
ABO for all defined benefit pension plans	$ 2,229.1	$ 2,534.1
Pension plans with the PBO in excess of plan assets
Projected benefit obligation	2,561.7	2,901.1
Fair value of plan assets	1,714.7	1,799.1
Other post-retirement benefit plans with the APBO in excess of plan assets
Accumulated benefit obligation	2,229.1	2,534.1
Fair value of plan assets	1,714.7	1,799.1
Post-Retirement Benefits
Other post-retirement benefit plans with the APBO in excess of plan assets
Accumulated benefit obligation	258.4	280.4
Fair value of plan assets	242.3	248.3
Evergy Kansas Central | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
ABO for all defined benefit pension plans	1,124.2	1,281.6
Pension plans with the PBO in excess of plan assets
Projected benefit obligation	1,264.4	1,429.6
Fair value of plan assets	835.7	887
Other post-retirement benefit plans with the APBO in excess of plan assets
Accumulated benefit obligation	1,124.2	1,281.6
Fair value of plan assets	835.7	887
Evergy Kansas Central | Post-Retirement Benefits
Other post-retirement benefit plans with the APBO in excess of plan assets
Accumulated benefit obligation	133.9	146.8
Fair value of plan assets	124	125.8
Evergy Metro | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
ABO for all defined benefit pension plans	1,081.1	1,227.4
Pension plans with the PBO in excess of plan assets
Projected benefit obligation	1,273.5	1,446.5
Fair value of plan assets	879	912.1
Other post-retirement benefit plans with the APBO in excess of plan assets
Accumulated benefit obligation	1,081.1	1,227.4
Fair value of plan assets	879	912.1
Evergy Metro | Post-Retirement Benefits
Other post-retirement benefit plans with the APBO in excess of plan assets
Accumulated benefit obligation	124.5	133.6
Fair value of plan assets	$ 118.3	$ 122.5

PENSION PLANS AND POST-RETIRE_7

PENSION PLANS AND POST-RETIREMENT BENEFITS - Weighted-Average Assumptions (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Pension Benefits
Weighted-average assumptions used to determine the benefit obligation
Discount rate	3.10%	2.95%
Rate of compensation increase	3.75%	3.71%
Interest crediting rate for cash balance plans	4.13%	4.12%
Weighted-average assumptions used to determine net costs
Discount rate	2.95%	3.62%
Expected long-term return on plan assets	6.63%	6.63%
Rate of compensation increase	3.71%	3.74%
Interest crediting rate for cash balance plans	4.12%	4.32%
Post-Retirement Benefits
Weighted-average assumptions used to determine the benefit obligation
Discount rate	3.12%	2.84%
Rate of compensation increase	3.75%	3.75%
Weighted-average assumptions used to determine net costs
Discount rate	2.84%	3.56%
Expected long-term return on plan assets	3.93%	4.19%
Rate of compensation increase	3.75%	3.75%
Evergy Kansas Central | Pension Benefits
Weighted-average assumptions used to determine the benefit obligation
Discount rate	3.10%	2.93%
Rate of compensation increase	3.77%	3.76%
Interest crediting rate for cash balance plans	4.00%	4.00%
Weighted-average assumptions used to determine net costs
Discount rate	2.93%	3.61%
Expected long-term return on plan assets	6.70%	6.70%
Rate of compensation increase	3.78%	3.75%
Interest crediting rate for cash balance plans	4.00%	4.21%
Evergy Kansas Central | Post-Retirement Benefits
Weighted-average assumptions used to determine the benefit obligation
Discount rate	3.11%	2.80%
Weighted-average assumptions used to determine net costs
Discount rate	2.80%	3.54%
Expected long-term return on plan assets	5.55%	6.00%
Evergy Metro | Pension Benefits
Weighted-average assumptions used to determine the benefit obligation
Discount rate	3.11%	2.97%
Rate of compensation increase	3.71%	3.71%
Interest crediting rate for cash balance plans	4.45%	4.46%
Weighted-average assumptions used to determine net costs
Discount rate	2.97%	3.64%
Expected long-term return on plan assets	6.57%	6.56%
Rate of compensation increase	3.71%	3.71%
Interest crediting rate for cash balance plans	4.46%	4.50%
Evergy Metro | Post-Retirement Benefits
Weighted-average assumptions used to determine the benefit obligation
Discount rate	3.13%	2.88%
Rate of compensation increase	3.75%	3.75%
Weighted-average assumptions used to determine net costs
Discount rate	2.88%	3.58%
Expected long-term return on plan assets	2.27%	2.37%
Rate of compensation increase	3.75%	3.75%

PENSION PLANS AND POST-RETIRE_8

PENSION PLANS AND POST-RETIREMENT BENEFITS - Expected Future Services (Details) $ in Millions	Dec. 31, 2021USD ($)
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
2022	$ 159.5
2023	160.4
2024	163.8
2025	168.1
2026	173.5
2027-2031	862.9
Post-Retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
2022	16.1
2023	15.6
2024	15.1
2025	14.7
2026	14.3
2027-2031	68.5
Evergy Kansas Central | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
2022	80.8
2023	79.6
2024	80.6
2025	81.3
2026	83.2
2027-2031	399.5
Evergy Kansas Central | Post-Retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
2022	9.2
2023	9
2024	8.5
2025	8.2
2026	8
2027-2031	37.2
Evergy Metro | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
2022	77.5
2023	79.5
2024	81.7
2025	85.3
2026	88.8
2027-2031	455.7
Evergy Metro | Post-Retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
2022	6.9
2023	6.7
2024	6.6
2025	6.5
2026	6.4
2027-2031	$ 31.2

PENSION PLANS AND POST-RETIRE_9

PENSION PLANS AND POST-RETIREMENT BENEFITS - Target Asset Allocations (Details)	Dec. 31, 2021
Evergy Kansas Central | Pension Benefits | Domestic equities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, target allocation, percentage	26.00%
Evergy Kansas Central | Pension Benefits | International equities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, target allocation, percentage	20.00%
Evergy Kansas Central | Pension Benefits | Bonds
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, target allocation, percentage	39.00%
Evergy Kansas Central | Pension Benefits | Mortgage & asset backed securities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, target allocation, percentage	0.00%
Evergy Kansas Central | Pension Benefits | Real estate investments
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, target allocation, percentage	4.00%
Evergy Kansas Central | Pension Benefits | Other investments
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, target allocation, percentage	11.00%
Evergy Kansas Central | Post-Retirement Benefits | Domestic equities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, target allocation, percentage	26.00%
Evergy Kansas Central | Post-Retirement Benefits | International equities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, target allocation, percentage	18.00%
Evergy Kansas Central | Post-Retirement Benefits | Bonds
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, target allocation, percentage	51.00%
Evergy Kansas Central | Post-Retirement Benefits | Mortgage & asset backed securities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, target allocation, percentage	0.00%
Evergy Kansas Central | Post-Retirement Benefits | Real estate investments
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, target allocation, percentage	0.00%
Evergy Kansas Central | Post-Retirement Benefits | Other investments
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, target allocation, percentage	5.00%
Evergy Metro | Pension Benefits | Domestic equities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, target allocation, percentage	26.00%
Evergy Metro | Pension Benefits | International equities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, target allocation, percentage	19.00%
Evergy Metro | Pension Benefits | Bonds
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, target allocation, percentage	37.00%
Evergy Metro | Pension Benefits | Mortgage & asset backed securities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, target allocation, percentage	0.00%
Evergy Metro | Pension Benefits | Real estate investments
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, target allocation, percentage	7.00%
Evergy Metro | Pension Benefits | Other investments
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, target allocation, percentage	11.00%
Evergy Metro | Post-Retirement Benefits | Domestic equities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, target allocation, percentage	15.00%
Evergy Metro | Post-Retirement Benefits | International equities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, target allocation, percentage	8.00%
Evergy Metro | Post-Retirement Benefits | Bonds
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, target allocation, percentage	68.00%
Evergy Metro | Post-Retirement Benefits | Mortgage & asset backed securities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, target allocation, percentage	6.00%
Evergy Metro | Post-Retirement Benefits | Real estate investments
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, target allocation, percentage	0.00%
Evergy Metro | Post-Retirement Benefits | Other investments
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets, target allocation, percentage	3.00%

PENSION PLANS AND POST-RETIR_10

PENSION PLANS AND POST-RETIREMENT BENEFITS - Fair Values of Assets (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 1,714.7	$ 1,799.1	$ 1,732.8
Post-Retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	242.3	248.3	239.9
Evergy Kansas Central | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	835.7	887	842.1
Evergy Kansas Central | Pension Benefits | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	717.8	516.2
Evergy Kansas Central | Pension Benefits | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Pension Benefits | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Pension Benefits | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	117.9	370.8
Evergy Kansas Central | Pension Benefits | Domestic equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	209.9	248.5
Evergy Kansas Central | Pension Benefits | Domestic equities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	177.3	151.3
Evergy Kansas Central | Pension Benefits | Domestic equities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Pension Benefits | Domestic equities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Pension Benefits | Domestic equities | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	32.6	97.2
Evergy Kansas Central | Pension Benefits | International equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	167.4	171.2
Evergy Kansas Central | Pension Benefits | International equities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	167.4	103.8
Evergy Kansas Central | Pension Benefits | International equities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Pension Benefits | International equities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Pension Benefits | International equities | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	67.4
Evergy Kansas Central | Pension Benefits | Bond funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	330.4	281.2
Evergy Kansas Central | Pension Benefits | Bond funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	330.4	230.7
Evergy Kansas Central | Pension Benefits | Bond funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Pension Benefits | Bond funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Pension Benefits | Bond funds | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	50.5
Evergy Kansas Central | Pension Benefits | Real estate investments
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	28.1	46.7
Evergy Kansas Central | Pension Benefits | Real estate investments | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Pension Benefits | Real estate investments | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Pension Benefits | Real estate investments | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Pension Benefits | Real estate investments | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	28.1	46.7
Evergy Kansas Central | Pension Benefits | Combination debt/equity/other fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	42.7	30.4
Evergy Kansas Central | Pension Benefits | Combination debt/equity/other fund | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	42.7	30.4
Evergy Kansas Central | Pension Benefits | Combination debt/equity/other fund | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Pension Benefits | Combination debt/equity/other fund | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Pension Benefits | Combination debt/equity/other fund | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Pension Benefits | Alternative investment funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	44.1	83.6
Evergy Kansas Central | Pension Benefits | Alternative investment funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Pension Benefits | Alternative investment funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Pension Benefits | Alternative investment funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Pension Benefits | Alternative investment funds | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	44.1	83.6
Evergy Kansas Central | Pension Benefits | Short-term investments
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13.1	25.4
Evergy Kansas Central | Pension Benefits | Short-term investments | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Pension Benefits | Short-term investments | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Pension Benefits | Short-term investments | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Pension Benefits | Short-term investments | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13.1	25.4
Evergy Kansas Central | Post-Retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	124	125.8	120.5
Evergy Kansas Central | Post-Retirement Benefits | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	123	0.7
Evergy Kansas Central | Post-Retirement Benefits | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Post-Retirement Benefits | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Post-Retirement Benefits | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1	125.1
Evergy Kansas Central | Post-Retirement Benefits | Domestic equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	32.5	41.9
Evergy Kansas Central | Post-Retirement Benefits | Domestic equities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	32.5	0
Evergy Kansas Central | Post-Retirement Benefits | Domestic equities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Post-Retirement Benefits | Domestic equities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Post-Retirement Benefits | Domestic equities | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	41.9
Evergy Kansas Central | Post-Retirement Benefits | International equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	22.1	27.7
Evergy Kansas Central | Post-Retirement Benefits | International equities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	22.1	0
Evergy Kansas Central | Post-Retirement Benefits | International equities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Post-Retirement Benefits | International equities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Post-Retirement Benefits | International equities | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	27.7
Evergy Kansas Central | Post-Retirement Benefits | Bond funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	62.3	55.5
Evergy Kansas Central | Post-Retirement Benefits | Bond funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	62.3	0
Evergy Kansas Central | Post-Retirement Benefits | Bond funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Post-Retirement Benefits | Bond funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Kansas Central | Post-Retirement Benefits | Bond funds | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	55.5
Evergy Kansas Central | Post-Retirement Benefits | Combination debt/equity/other fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6.1
Evergy Kansas Central | Post-Retirement Benefits | Combination debt/equity/other fund | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6.1
Evergy Kansas Central | Post-Retirement Benefits | Combination debt/equity/other fund | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Evergy Kansas Central | Post-Retirement Benefits | Combination debt/equity/other fund | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Evergy Kansas Central | Post-Retirement Benefits | Combination debt/equity/other fund | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Evergy Kansas Central | Post-Retirement Benefits | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0.7
Evergy Kansas Central | Post-Retirement Benefits | Cash and cash equivalents | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0.7
Evergy Kansas Central | Post-Retirement Benefits | Cash and cash equivalents | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Evergy Kansas Central | Post-Retirement Benefits | Cash and cash equivalents | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Evergy Kansas Central | Post-Retirement Benefits | Cash and cash equivalents | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Evergy Kansas Central | Post-Retirement Benefits | Short-term investments
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1
Evergy Kansas Central | Post-Retirement Benefits | Short-term investments | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Evergy Kansas Central | Post-Retirement Benefits | Short-term investments | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Evergy Kansas Central | Post-Retirement Benefits | Short-term investments | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Evergy Kansas Central | Post-Retirement Benefits | Short-term investments | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1
Evergy Metro | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	879	912.1	890.7
Evergy Metro | Pension Benefits | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	698.2	502.4
Evergy Metro | Pension Benefits | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	44.4	150.1
Evergy Metro | Pension Benefits | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	136.4	259.6
Evergy Metro | Pension Benefits | Domestic equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	203	247.4
Evergy Metro | Pension Benefits | Domestic equities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	179.5	191.9
Evergy Metro | Pension Benefits | Domestic equities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | Domestic equities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | Domestic equities | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	23.5	55.5
Evergy Metro | Pension Benefits | International equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	193.1	220.8
Evergy Metro | Pension Benefits | International equities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	193.1	153.4
Evergy Metro | Pension Benefits | International equities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | International equities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | International equities | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	67.4
Evergy Metro | Pension Benefits | Bond funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	260.6	78.1
Evergy Metro | Pension Benefits | Bond funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	260.6	21.1
Evergy Metro | Pension Benefits | Bond funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | Bond funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | Bond funds | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	57
Evergy Metro | Pension Benefits | Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	27.1	133.6
Evergy Metro | Pension Benefits | Corporate bonds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | Corporate bonds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	27.1	133.6
Evergy Metro | Pension Benefits | Corporate bonds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | Corporate bonds | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | U.S. Treasury and agency bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	14.5	73.8
Evergy Metro | Pension Benefits | U.S. Treasury and agency bonds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4.7	61.5
Evergy Metro | Pension Benefits | U.S. Treasury and agency bonds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9.8	12.3
Evergy Metro | Pension Benefits | U.S. Treasury and agency bonds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | U.S. Treasury and agency bonds | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | Mortgage and asset backed securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4.3	5
Evergy Metro | Pension Benefits | Mortgage and asset backed securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | Mortgage and asset backed securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4.3	5
Evergy Metro | Pension Benefits | Mortgage and asset backed securities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | Mortgage and asset backed securities | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | Real estate investments
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	55.9	40.2
Evergy Metro | Pension Benefits | Real estate investments | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	1.6
Evergy Metro | Pension Benefits | Real estate investments | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | Real estate investments | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | Real estate investments | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	55.9	38.6
Evergy Metro | Pension Benefits | Combination debt/equity/other fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	46.2	15.6
Evergy Metro | Pension Benefits | Combination debt/equity/other fund | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	46.2	15.6
Evergy Metro | Pension Benefits | Combination debt/equity/other fund | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | Combination debt/equity/other fund | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | Combination debt/equity/other fund | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | Alternative investment funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	47.5	39.7
Evergy Metro | Pension Benefits | Alternative investment funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | Alternative investment funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | Alternative investment funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | Alternative investment funds | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	47.5	39.7
Evergy Metro | Pension Benefits | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	14.1	57.3
Evergy Metro | Pension Benefits | Cash and cash equivalents | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	14.1	57.3
Evergy Metro | Pension Benefits | Cash and cash equivalents | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | Cash and cash equivalents | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | Cash and cash equivalents | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | Short-term investments
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9.5	1.4
Evergy Metro | Pension Benefits | Short-term investments | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | Short-term investments | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | Short-term investments | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | Short-term investments | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9.5	1.4
Evergy Metro | Pension Benefits | Other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3.2	(0.8)
Evergy Metro | Pension Benefits | Other | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | Other | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3.2	(0.8)
Evergy Metro | Pension Benefits | Other | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Pension Benefits | Other | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Post-Retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	118.3	122.5	$ 119.4
Evergy Metro | Post-Retirement Benefits | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	93	17.1
Evergy Metro | Post-Retirement Benefits | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	25.2	26.6
Evergy Metro | Post-Retirement Benefits | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Post-Retirement Benefits | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.1	78.8
Evergy Metro | Post-Retirement Benefits | Domestic equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	20	4.6
Evergy Metro | Post-Retirement Benefits | Domestic equities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	20	4.6
Evergy Metro | Post-Retirement Benefits | Domestic equities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Post-Retirement Benefits | Domestic equities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Post-Retirement Benefits | Domestic equities | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Post-Retirement Benefits | International equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	12.3	1.2
Evergy Metro | Post-Retirement Benefits | International equities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	12.3	1.2
Evergy Metro | Post-Retirement Benefits | International equities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Post-Retirement Benefits | International equities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Post-Retirement Benefits | International equities | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Post-Retirement Benefits | Bond funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	50.2	79
Evergy Metro | Post-Retirement Benefits | Bond funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	50.2	0.2
Evergy Metro | Post-Retirement Benefits | Bond funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Post-Retirement Benefits | Bond funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Post-Retirement Benefits | Bond funds | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	78.8
Evergy Metro | Post-Retirement Benefits | Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	18.1	17.9
Evergy Metro | Post-Retirement Benefits | Corporate bonds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Post-Retirement Benefits | Corporate bonds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	18.1	17.9
Evergy Metro | Post-Retirement Benefits | Corporate bonds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Post-Retirement Benefits | Corporate bonds | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Post-Retirement Benefits | U.S. Treasury and agency bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	12.1	13.6
Evergy Metro | Post-Retirement Benefits | U.S. Treasury and agency bonds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6.1	5.7
Evergy Metro | Post-Retirement Benefits | U.S. Treasury and agency bonds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6	7.9
Evergy Metro | Post-Retirement Benefits | U.S. Treasury and agency bonds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Post-Retirement Benefits | U.S. Treasury and agency bonds | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Post-Retirement Benefits | Mortgage and asset backed securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.8	0.5
Evergy Metro | Post-Retirement Benefits | Mortgage and asset backed securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Post-Retirement Benefits | Mortgage and asset backed securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.8	0.5
Evergy Metro | Post-Retirement Benefits | Mortgage and asset backed securities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Post-Retirement Benefits | Mortgage and asset backed securities | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Post-Retirement Benefits | Combination debt/equity/other fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3.9
Evergy Metro | Post-Retirement Benefits | Combination debt/equity/other fund | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3.9
Evergy Metro | Post-Retirement Benefits | Combination debt/equity/other fund | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Evergy Metro | Post-Retirement Benefits | Combination debt/equity/other fund | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Evergy Metro | Post-Retirement Benefits | Combination debt/equity/other fund | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Evergy Metro | Post-Retirement Benefits | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.5	5.4
Evergy Metro | Post-Retirement Benefits | Cash and cash equivalents | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.5	5.4
Evergy Metro | Post-Retirement Benefits | Cash and cash equivalents | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Post-Retirement Benefits | Cash and cash equivalents | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Post-Retirement Benefits | Cash and cash equivalents | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Post-Retirement Benefits | Short-term investments
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.1
Evergy Metro | Post-Retirement Benefits | Short-term investments | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Evergy Metro | Post-Retirement Benefits | Short-term investments | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Evergy Metro | Post-Retirement Benefits | Short-term investments | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Evergy Metro | Post-Retirement Benefits | Short-term investments | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.1
Evergy Metro | Post-Retirement Benefits | Other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.3	0.3
Evergy Metro | Post-Retirement Benefits | Other | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Post-Retirement Benefits | Other | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.3	0.3
Evergy Metro | Post-Retirement Benefits | Other | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Evergy Metro | Post-Retirement Benefits | Other | Assets measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0	$ 0

PENSION PLANS AND POST-RETIR_11

PENSION PLANS AND POST-RETIREMENT BENEFITS - Cost Trend Assumptions (Details) - Post-Retirement Benefits	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Assumed annual health care cost growth rates
Health care cost trend rate assumed for next year	6.00%	6.00%
Rate to which the cost trend is assumed to decline (the ultimate trend rate)	4.50%	4.50%
Year that rate reaches ultimate trend	2030	2027
Evergy Kansas Central
Assumed annual health care cost growth rates
Health care cost trend rate assumed for next year	6.00%	6.00%
Rate to which the cost trend is assumed to decline (the ultimate trend rate)	4.50%	4.50%
Year that rate reaches ultimate trend	2030	2027
Evergy Metro
Assumed annual health care cost growth rates
Health care cost trend rate assumed for next year	6.00%	6.00%
Rate to which the cost trend is assumed to decline (the ultimate trend rate)	4.50%	4.50%
Year that rate reaches ultimate trend	2030	2027

PENSION PLANS AND POST-RETIR_12

PENSION PLANS AND POST-RETIREMENT BENEFITS - Employee Savings Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, cost	$ 25.6	$ 17.4	$ 17.6
Evergy Kansas Central
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, cost	11.7	9.6	9.6
Evergy Metro
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, cost	$ 13.9	$ 7.8	$ 8

EQUITY COMPENSATION - Narrative

EQUITY COMPENSATION - Narrative (Details) - shares	1 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility, maximum		32.00%
Expected dividend yield		3.99%
Risk-free interest rate, maximum		0.24%
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares vested related to the Merger	108,010
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares vested related to the Merger	36,012

EQUITY COMPENSATION - Income Ta

EQUITY COMPENSATION - Income Tax Benefit (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity compensation expense	$ 15.6	$ 15.5	$ 15.5
Income tax (expense) benefit	(0.1)	2.2	3
Evergy Kansas Central
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity compensation expense	6.9	7.6	6.7
Income tax (expense) benefit	(0.2)	1.6	1.9
Evergy Metro
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity compensation expense	5.1	5.7	5.7
Income tax (expense) benefit	$ (0.6)	$ 0.2	$ 0.3

EQUITY COMPENSATION - RSUs (Det

EQUITY COMPENSATION - RSUs (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
RSU With Performance Measures
Nonvested Restricted Share Units
Beginning balance (in shares)	347,964
Granted (in shares)	270,277
Vested (in shares)	0	0	0
Forfeited (in shares)	(104,526)
Ending balance (in shares)	513,715	347,964
Grant Date Fair Value*
Weighted average beginning balance (in dollars per share)	$ 61.57
Weighted average granted (in dollars per share)	57.21	$ 87.98	$ 37.87
Weighted average, forfeited (in dollars per share)	64.85
Weighted average ending balance (in dollars per share)	$ 58.79	$ 61.57
Remaining weighted-average contractual term (in years)	1 year 4 months 24 days
Total unrecognized compensation expense,	$ 15.3
RSUs
Nonvested Restricted Share Units
Beginning balance (in shares)	160,742
Granted (in shares)	171,363
Vested (in shares)	43,785
Forfeited (in shares)	(35,274)
Ending balance (in shares)	253,046	160,742
Grant Date Fair Value*
Weighted average beginning balance (in dollars per share)	$ 59.42
Weighted average granted (in dollars per share)	55.30	$ 68.92	$ 54.47
Weighted average, vested (in dollars per share)	54.61
Weighted average, forfeited (in dollars per share)	59.24
Weighted average ending balance (in dollars per share)	$ 57.18	$ 59.42
Remaining weighted-average contractual term (in years)	1 year 4 months 24 days
Total unrecognized compensation expense,	$ 7
Total fair value of shares	$ 2.4	$ 6.5	$ 2.6

SHORT-TERM BORROWINGS AND SHO_3

SHORT-TERM BORROWINGS AND SHORT-TERM BANK LINES OF CREDIT - Narrative (Details) - Cash Borrowings	Dec. 31, 2021USD ($)
Short-term Debt [Line Items]
Line of credit, maximum borrowing capacity	$ 2,500,000,000
Debt instrument, debt default, threshold	$ 100,000,000
Debt Instrument, debt to capitalization ratio (no more than)	65.00%
Evergy Kansas Central
Short-term Debt [Line Items]
Debt instrument, debt default, threshold	$ 100,000,000
Debt Instrument, debt to capitalization ratio (no more than)	65.00%
Evergy Metro
Short-term Debt [Line Items]
Debt instrument, debt default, threshold	$ 100,000,000
Debt Instrument, debt to capitalization ratio (no more than)	65.00%
Evergy Missouri West
Short-term Debt [Line Items]
Debt instrument, debt default, threshold	$ 100,000,000
Debt Instrument, debt to capitalization ratio (no more than)	65.00%

SHORT-TERM BORROWINGS AND SHO_4

SHORT-TERM BORROWINGS AND SHORT-TERM BANK LINES OF CREDIT - Schedule of Short Term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Short-term Debt [Line Items]
Master Credit Facility	$ 2,500	$ 2,500
Available Borrowings	1,339.9	2,165.3
Evergy, Inc.
Short-term Debt [Line Items]
Master Credit Facility	700	450
Available Borrowings	$ 341.3	$ 249.3
Weighted Average Interest Rate on Short-Term Borrowings	0.34%	1.40%
Evergy Kansas Central
Short-term Debt [Line Items]
Master Credit Facility	$ 750	$ 1,000
Available Borrowings	$ 343.9	$ 933
Weighted Average Interest Rate on Short-Term Borrowings	0.41%	0.23%
Evergy Metro
Short-term Debt [Line Items]
Master Credit Facility	$ 350	$ 600
Available Borrowings	$ 350	$ 600
Weighted Average Interest Rate on Short-Term Borrowings	0.00%	0.00%
Evergy Missouri West
Short-term Debt [Line Items]
Master Credit Facility	$ 700	$ 450
Available Borrowings	$ 304.7	$ 383
Weighted Average Interest Rate on Short-Term Borrowings	0.40%	0.36%
Commercial Paper
Short-term Debt [Line Items]
Long-term line of credit	$ 1,159.3	$ 115
Commercial Paper | Evergy, Inc.
Short-term Debt [Line Items]
Long-term line of credit	358
Commercial Paper | Evergy Kansas Central
Short-term Debt [Line Items]
Long-term line of credit	406	50
Commercial Paper | Evergy Metro
Short-term Debt [Line Items]
Long-term line of credit	0	0
Commercial Paper | Evergy Missouri West
Short-term Debt [Line Items]
Long-term line of credit	395.3	65
Letters of Credit
Short-term Debt [Line Items]
Letters of Credit	0.8	19.7
Letters of Credit | Evergy, Inc.
Short-term Debt [Line Items]
Letters of Credit	0.7	0.7
Letters of Credit | Evergy Kansas Central
Short-term Debt [Line Items]
Letters of Credit	0.1	17
Letters of Credit | Evergy Metro
Short-term Debt [Line Items]
Letters of Credit	0	0
Letters of Credit | Evergy Missouri West
Short-term Debt [Line Items]
Letters of Credit	0	2
Cash Borrowings
Short-term Debt [Line Items]
Long-term line of credit	0	200
Cash Borrowings | Evergy, Inc.
Short-term Debt [Line Items]
Long-term line of credit	0	200
Cash Borrowings | Evergy Kansas Central
Short-term Debt [Line Items]
Long-term line of credit	0	0
Cash Borrowings | Evergy Metro
Short-term Debt [Line Items]
Long-term line of credit	0	0
Cash Borrowings | Evergy Missouri West
Short-term Debt [Line Items]
Long-term line of credit	$ 0	$ 0

LONG-TERM DEBT (Details)

LONG-TERM DEBT (Details) - USD ($) $ in Millions	Dec. 31, 2021	Apr. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Current maturities of long-term debt	$ (389.3)		$ (436.4)
Unamortized debt discount and debt issuance costs	(80.5)		(84.9)
Total excluding current maturities	9,297.9		9,190.9
Fair Value adjustment
Debt Instrument [Line Items]
Long-term debt gross	97.9		110.4
Current maturities of long-term debt	$ (1.8)		$ (4.4)
Mortgage Bonds | Mortgage Bonds Due 2025 EKC
Debt Instrument [Line Items]
Interest rate	3.25%		3.25%
Long-term debt gross	$ 250		$ 250
Mortgage Bonds | Mortgage Bonds Due 2026 EKC
Debt Instrument [Line Items]
Interest rate	2.55%		2.55%
Long-term debt gross	$ 350		$ 350
Mortgage Bonds | Mortgage Bonds Due 2027 EKC
Debt Instrument [Line Items]
Interest rate	3.10%		3.10%
Long-term debt gross	$ 300		$ 300
Mortgage Bonds | Mortgage Bonds Due 2042 EKC
Debt Instrument [Line Items]
Interest rate	4.125%		4.125%
Long-term debt gross	$ 550		$ 550
Mortgage Bonds | Mortgage Bonds Due 2043 EKC
Debt Instrument [Line Items]
Interest rate	4.10%		4.10%
Long-term debt gross	$ 430		$ 430
Mortgage Bonds | Mortgage Bonds Due 2043 EKC
Debt Instrument [Line Items]
Interest rate	4.625%		4.625%
Long-term debt gross	$ 250		$ 250
Mortgage Bonds | Mortgage Bonds Due 2045 EKC
Debt Instrument [Line Items]
Interest rate	4.25%		4.25%
Long-term debt gross	$ 300		$ 300
Mortgage Bonds | Mortgage Bonds Due 2049 EKC
Debt Instrument [Line Items]
Interest rate	3.25%		3.25%
Long-term debt gross	$ 300		$ 300
Mortgage Bonds | Mortgage Bonds Due 2050 EKC
Debt Instrument [Line Items]
Interest rate	3.45%		3.45%
Long-term debt gross	$ 500		$ 500
Mortgage Bonds | Mortgage Bonds Due 2023 EKS
Debt Instrument [Line Items]
Interest rate	6.15%		6.15%
Long-term debt gross	$ 50		$ 50
Mortgage Bonds | Mortgage Bonds Due 2037 EKS
Debt Instrument [Line Items]
Interest rate	6.53%		6.53%
Long-term debt gross	$ 175		$ 175
Mortgage Bonds | Mortgage Bonds Due 2038 EKS
Debt Instrument [Line Items]
Interest rate	6.64%		6.64%
Long-term debt gross	$ 100		$ 100
Mortgage Bonds | Mortgage Bonds Due 2044 EKS
Debt Instrument [Line Items]
Interest rate	4.30%		4.30%
Long-term debt gross	$ 250		$ 250
Mortgage Bonds | Mortgage Bonds Due 2023 EM
Debt Instrument [Line Items]
Interest rate	2.95%		2.95%
Long-term debt gross	$ 79.5		$ 79.5
Mortgage Bonds | Mortgage Bonds Due 2049 EM
Debt Instrument [Line Items]
Interest rate	4.125%		4.125%
Long-term debt gross	$ 400		$ 400
Mortgage Bonds | Mortgage Bonds Due 2030 EM
Debt Instrument [Line Items]
Interest rate	2.25%		2.25%
Long-term debt gross	$ 400		$ 400
Mortgage Bonds | Mortgage Bonds Due Through 2021-2021 EMW
Debt Instrument [Line Items]
Interest rate			9.44%
Long-term debt gross			$ 1.1
Pollution Control Bonds | Pollution Control Bonds Due 2032A EKC
Debt Instrument [Line Items]
Interest rate	0.132%		0.18%
Long-term debt gross	$ 45		$ 45
Pollution Control Bonds | Pollution Control Bonds Due 2032B EKC
Debt Instrument [Line Items]
Interest rate	0.132%		0.18%
Long-term debt gross	$ 30.5		$ 30.5
Pollution Control Bonds | Pollution Control Bonds Due 2027 EKS
Debt Instrument [Line Items]
Interest rate	0.132%		0.18%
Long-term debt gross	$ 21.9		$ 21.9
Pollution Control Bonds | Pollution Control Bonds Due 2031 EKS
Debt Instrument [Line Items]
Interest rate	2.50%		2.50%
Long-term debt gross	$ 50		$ 50
Pollution Control Bonds | Pollution Control Bonds Due 2032A EKS
Debt Instrument [Line Items]
Interest rate	0.132%		0.18%
Long-term debt gross	$ 14.5		$ 14.5
Pollution Control Bonds | Pollution Control Bonds Due 2032B EKS
Debt Instrument [Line Items]
Interest rate	0.132%		0.18%
Long-term debt gross	$ 10		$ 10
Pollution Control Bonds | EIRR Bonds Series 2007A and 2007B due 2035 EM
Debt Instrument [Line Items]
Interest rate	0.167%		0.20%
Long-term debt gross	$ 146.5		$ 146.5
Pollution Control Bonds | EIRR Bonds Series 2007A and 2007B due 2038 EM
Debt Instrument [Line Items]
Interest rate	2.75%		2.75%
Long-term debt gross	$ 23.4		$ 23.4
Senior Notes | Series Notes Due 2023 EM
Debt Instrument [Line Items]
Interest rate	3.15%		3.15%
Long-term debt gross	$ 300		$ 300
Senior Notes | Senior Notes Due 2025 EM
Debt Instrument [Line Items]
Interest rate	3.65%		3.65%
Long-term debt gross	$ 350		$ 350
Senior Notes | Senior Notes Due 2035 EM
Debt Instrument [Line Items]
Interest rate	6.05%		6.05%
Long-term debt gross	$ 250		$ 250
Senior Notes | Senior Notes Due 2035A EM
Debt Instrument [Line Items]
Interest rate	5.78%		5.78%
Senior Notes | Senior Notes Due 2041 EM
Debt Instrument [Line Items]
Interest rate	5.30%		5.30%
Long-term debt gross	$ 400		$ 400
Senior Notes | Senior Notes Due 2047 EM
Debt Instrument [Line Items]
Interest rate	4.20%		4.20%
Long-term debt gross	$ 300		$ 300
Senior Notes | Senior Notes Due 2048 EM
Debt Instrument [Line Items]
Interest rate	4.20%		4.20%
Long-term debt gross	$ 300		$ 300
Senior Notes | Senior Notes Due 2021 EMW
Debt Instrument [Line Items]
Interest rate			8.27%
Long-term debt gross			$ 80.9
Senior Notes | Senior Notes Due 2025 EMW
Debt Instrument [Line Items]
Interest rate	3.49%		3.49%
Long-term debt gross	$ 36		$ 36
Senior Notes | Senior Notes Due 2033 EMW
Debt Instrument [Line Items]
Interest rate	4.06%		4.06%
Long-term debt gross	$ 60		$ 60
Senior Notes | Senior Notes Due 2043 EMW
Debt Instrument [Line Items]
Interest rate	4.74%		4.74%
Long-term debt gross	$ 150		$ 150
Senior Notes | Senior Notes Series Due 2022 EMW
Debt Instrument [Line Items]
Interest rate	3.74%		3.74%
Long-term debt gross	$ 100		$ 100
Senior Notes | Senior Notes Series A due 2031 EMW
Debt Instrument [Line Items]
Interest rate	2.86%
Long-term debt gross	$ 350
Senior Notes | Senior Notes Series B due 2033 EMW
Debt Instrument [Line Items]
Interest rate	3.01%
Long-term debt gross	$ 75
Senior Notes | Senior Notes Series C due 2036 EMW
Debt Instrument [Line Items]
Interest rate	3.21%
Long-term debt gross	$ 75
Senior Notes | Senior Notes Due 2021
Debt Instrument [Line Items]
Interest rate		4.85%	4.85%
Long-term debt gross		$ 350	$ 350
Senior Notes | Senior Notes Due 2022
Debt Instrument [Line Items]
Interest rate	5.292%		5.292%
Long-term debt gross	$ 287.5		$ 287.5
Senior Notes | Senior Notes Due 2024
Debt Instrument [Line Items]
Interest rate	2.45%		2.45%
Long-term debt gross	$ 800		$ 800
Senior Notes | Senior Notes Due 2029
Debt Instrument [Line Items]
Interest rate	2.90%		2.90%
Long-term debt gross	$ 800		$ 800
Senior Notes | Senior Notes Due 2029A
Debt Instrument [Line Items]
Interest rate	3.77%		3.77%
Medium Term Notes | Medium Term Notes Due 2023 EMW
Debt Instrument [Line Items]
Interest rate	7.33%		7.33%
Long-term debt gross	$ 3		$ 3
Medium Term Notes | Medium Term Notes Due 2023 EMW
Debt Instrument [Line Items]
Interest rate	7.17%		7.17%
Long-term debt gross	$ 7		$ 7
Evergy Kansas Central
Debt Instrument [Line Items]
Current maturities of long-term debt	0		0
Unamortized debt discount and debt issuance costs	(42.7)		(45.4)
Total excluding current maturities	3,934.2		3,931.5
Evergy Kansas Central | Fair Value adjustment
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Kansas Central | Mortgage Bonds | Mortgage Bonds Due 2025 EKC
Debt Instrument [Line Items]
Long-term debt gross	250		250
Evergy Kansas Central | Mortgage Bonds | Mortgage Bonds Due 2026 EKC
Debt Instrument [Line Items]
Long-term debt gross	350		350
Evergy Kansas Central | Mortgage Bonds | Mortgage Bonds Due 2027 EKC
Debt Instrument [Line Items]
Long-term debt gross	300		300
Evergy Kansas Central | Mortgage Bonds | Mortgage Bonds Due 2042 EKC
Debt Instrument [Line Items]
Long-term debt gross	550		550
Evergy Kansas Central | Mortgage Bonds | Mortgage Bonds Due 2043 EKC
Debt Instrument [Line Items]
Long-term debt gross	430		430
Evergy Kansas Central | Mortgage Bonds | Mortgage Bonds Due 2043 EKC
Debt Instrument [Line Items]
Long-term debt gross	250		250
Evergy Kansas Central | Mortgage Bonds | Mortgage Bonds Due 2045 EKC
Debt Instrument [Line Items]
Long-term debt gross	300		300
Evergy Kansas Central | Mortgage Bonds | Mortgage Bonds Due 2049 EKC
Debt Instrument [Line Items]
Long-term debt gross	300		300
Evergy Kansas Central | Mortgage Bonds | Mortgage Bonds Due 2050 EKC
Debt Instrument [Line Items]
Long-term debt gross	500		500
Evergy Kansas Central | Mortgage Bonds | Mortgage Bonds Due 2023 EKS
Debt Instrument [Line Items]
Long-term debt gross	50		50
Evergy Kansas Central | Mortgage Bonds | Mortgage Bonds Due 2037 EKS
Debt Instrument [Line Items]
Long-term debt gross	175		175
Evergy Kansas Central | Mortgage Bonds | Mortgage Bonds Due 2038 EKS
Debt Instrument [Line Items]
Long-term debt gross	100		100
Evergy Kansas Central | Mortgage Bonds | Mortgage Bonds Due 2044 EKS
Debt Instrument [Line Items]
Long-term debt gross	250		250
Evergy Kansas Central | Mortgage Bonds | Mortgage Bonds Due 2023 EM
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Kansas Central | Mortgage Bonds | Mortgage Bonds Due 2049 EM
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Kansas Central | Mortgage Bonds | Mortgage Bonds Due 2030 EM
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Kansas Central | Mortgage Bonds | Mortgage Bonds Due Through 2021-2021 EMW
Debt Instrument [Line Items]
Long-term debt gross			0
Evergy Kansas Central | Pollution Control Bonds | Pollution Control Bonds Due 2032A EKC
Debt Instrument [Line Items]
Long-term debt gross	45		45
Evergy Kansas Central | Pollution Control Bonds | Pollution Control Bonds Due 2032B EKC
Debt Instrument [Line Items]
Long-term debt gross	30.5		30.5
Evergy Kansas Central | Pollution Control Bonds | Pollution Control Bonds Due 2027 EKS
Debt Instrument [Line Items]
Long-term debt gross	21.9		21.9
Evergy Kansas Central | Pollution Control Bonds | Pollution Control Bonds Due 2031 EKS
Debt Instrument [Line Items]
Long-term debt gross	50		50
Evergy Kansas Central | Pollution Control Bonds | Pollution Control Bonds Due 2032A EKS
Debt Instrument [Line Items]
Long-term debt gross	14.5		14.5
Evergy Kansas Central | Pollution Control Bonds | Pollution Control Bonds Due 2032B EKS
Debt Instrument [Line Items]
Long-term debt gross	10		10
Evergy Kansas Central | Pollution Control Bonds | EIRR Bonds Series 2007A and 2007B due 2035 EM
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Kansas Central | Pollution Control Bonds | EIRR Bonds Series 2007A and 2007B due 2038 EM
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Kansas Central | Senior Notes | Series Notes Due 2023 EM
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Kansas Central | Senior Notes | Senior Notes Due 2025 EM
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Kansas Central | Senior Notes | Senior Notes Due 2035 EM
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Kansas Central | Senior Notes | Senior Notes Due 2041 EM
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Kansas Central | Senior Notes | Senior Notes Due 2047 EM
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Kansas Central | Senior Notes | Senior Notes Due 2048 EM
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Kansas Central | Senior Notes | Senior Notes Due 2021 EMW
Debt Instrument [Line Items]
Long-term debt gross			0
Evergy Kansas Central | Senior Notes | Senior Notes Due 2025 EMW
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Kansas Central | Senior Notes | Senior Notes Due 2033 EMW
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Kansas Central | Senior Notes | Senior Notes Due 2043 EMW
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Kansas Central | Senior Notes | Senior Notes Series Due 2022 EMW
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Kansas Central | Senior Notes | Senior Notes Series A due 2031 EMW
Debt Instrument [Line Items]
Long-term debt gross	0
Evergy Kansas Central | Senior Notes | Senior Notes Series B due 2033 EMW
Debt Instrument [Line Items]
Long-term debt gross	0
Evergy Kansas Central | Senior Notes | Senior Notes Series C due 2036 EMW
Debt Instrument [Line Items]
Long-term debt gross	0
Evergy Kansas Central | Senior Notes | Senior Notes Due 2021
Debt Instrument [Line Items]
Long-term debt gross			0
Evergy Kansas Central | Senior Notes | Senior Notes Due 2022
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Kansas Central | Senior Notes | Senior Notes Due 2024
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Kansas Central | Senior Notes | Senior Notes Due 2029
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Kansas Central | Medium Term Notes | Medium Term Notes Due 2023 EMW
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Kansas Central | Medium Term Notes | Medium Term Notes Due 2023 EMW
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro
Debt Instrument [Line Items]
Current maturities of long-term debt	0		0
Unamortized debt discount and debt issuance costs	(24.4)		(26.4)
Total excluding current maturities	2,925		2,923
Evergy Metro | Fair Value adjustment
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro | Mortgage Bonds | Mortgage Bonds Due 2025 EKC
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro | Mortgage Bonds | Mortgage Bonds Due 2026 EKC
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro | Mortgage Bonds | Mortgage Bonds Due 2027 EKC
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro | Mortgage Bonds | Mortgage Bonds Due 2042 EKC
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro | Mortgage Bonds | Mortgage Bonds Due 2043 EKC
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro | Mortgage Bonds | Mortgage Bonds Due 2043 EKC
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro | Mortgage Bonds | Mortgage Bonds Due 2045 EKC
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro | Mortgage Bonds | Mortgage Bonds Due 2049 EKC
Debt Instrument [Line Items]
Long-term debt gross
Evergy Metro | Mortgage Bonds | Mortgage Bonds Due 2050 EKC
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro | Mortgage Bonds | Mortgage Bonds Due 2023 EKS
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro | Mortgage Bonds | Mortgage Bonds Due 2037 EKS
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro | Mortgage Bonds | Mortgage Bonds Due 2038 EKS
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro | Mortgage Bonds | Mortgage Bonds Due 2044 EKS
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro | Mortgage Bonds | Mortgage Bonds Due 2023 EM
Debt Instrument [Line Items]
Long-term debt gross	79.5		79.5
Evergy Metro | Mortgage Bonds | Mortgage Bonds Due 2049 EM
Debt Instrument [Line Items]
Long-term debt gross	400		400
Evergy Metro | Mortgage Bonds | Mortgage Bonds Due 2030 EM
Debt Instrument [Line Items]
Long-term debt gross	400		400
Evergy Metro | Mortgage Bonds | Mortgage Bonds Due Through 2021-2021 EMW
Debt Instrument [Line Items]
Long-term debt gross			0
Evergy Metro | Mortgage Bonds | General Mortgage Bonds EIRR Series 2005
Debt Instrument [Line Items]
Long-term debt gross	50		21.9
Evergy Metro | Pollution Control Bonds | Pollution Control Bonds Due 2032A EKC
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro | Pollution Control Bonds | Pollution Control Bonds Due 2032B EKC
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro | Pollution Control Bonds | Pollution Control Bonds Due 2027 EKS
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro | Pollution Control Bonds | Pollution Control Bonds Due 2031 EKS
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro | Pollution Control Bonds | Pollution Control Bonds Due 2032A EKS
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro | Pollution Control Bonds | Pollution Control Bonds Due 2032B EKS
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro | Pollution Control Bonds | EIRR Bonds Series 2007A and 2007B due 2035 EM
Debt Instrument [Line Items]
Long-term debt gross	146.5		146.5
Evergy Metro | Pollution Control Bonds | EIRR Bonds Series 2007A and 2007B due 2038 EM
Debt Instrument [Line Items]
Long-term debt gross	23.4		23.4
Evergy Metro | Senior Notes | Series Notes Due 2023 EM
Debt Instrument [Line Items]
Long-term debt gross	300		300
Evergy Metro | Senior Notes | Senior Notes Due 2025 EM
Debt Instrument [Line Items]
Long-term debt gross	350		350
Evergy Metro | Senior Notes | Senior Notes Due 2035 EM
Debt Instrument [Line Items]
Long-term debt gross	250		250
Evergy Metro | Senior Notes | Senior Notes Due 2041 EM
Debt Instrument [Line Items]
Long-term debt gross	400		400
Evergy Metro | Senior Notes | Senior Notes Due 2047 EM
Debt Instrument [Line Items]
Long-term debt gross	300		300
Evergy Metro | Senior Notes | Senior Notes Due 2048 EM
Debt Instrument [Line Items]
Long-term debt gross	300		300
Evergy Metro | Senior Notes | Senior Notes Due 2021 EMW
Debt Instrument [Line Items]
Long-term debt gross			0
Evergy Metro | Senior Notes | Senior Notes Due 2025 EMW
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro | Senior Notes | Senior Notes Due 2033 EMW
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro | Senior Notes | Senior Notes Due 2043 EMW
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro | Senior Notes | Senior Notes Series Due 2022 EMW
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro | Senior Notes | Senior Notes Series A due 2031 EMW
Debt Instrument [Line Items]
Long-term debt gross	0
Evergy Metro | Senior Notes | Senior Notes Series B due 2033 EMW
Debt Instrument [Line Items]
Long-term debt gross	0
Evergy Metro | Senior Notes | Senior Notes Series C due 2036 EMW
Debt Instrument [Line Items]
Long-term debt gross	0
Evergy Metro | Senior Notes | Senior Notes Due 2021
Debt Instrument [Line Items]
Long-term debt gross			0
Evergy Metro | Senior Notes | Senior Notes Due 2022
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro | Senior Notes | Senior Notes Due 2024
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro | Senior Notes | Senior Notes Due 2029
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro | Medium Term Notes | Medium Term Notes Due 2023 EMW
Debt Instrument [Line Items]
Long-term debt gross	0		0
Evergy Metro | Medium Term Notes | Medium Term Notes Due 2023 EMW
Debt Instrument [Line Items]
Long-term debt gross	0		0
Variable Interest Entities
Debt Instrument [Line Items]
Current maturities of long-term debt	0		(18.8)
Variable Interest Entities | Evergy Kansas Central
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 0		$ (18.8)

LONG-TERM DEBT - Narrative (Det

LONG-TERM DEBT - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Nov. 30, 2021	Apr. 30, 2021	Dec. 31, 2020
Senior Notes | Senior Notes Series A due 2031 EMW
Debt Instrument [Line Items]
Long-term debt gross	$ 350
Interest rate	2.86%
Senior Notes | Senior Notes Series B due 2033 EMW
Debt Instrument [Line Items]
Long-term debt gross	$ 75
Interest rate	3.01%
Senior Notes | Senior Notes Series C due 2036 EMW
Debt Instrument [Line Items]
Long-term debt gross	$ 75
Interest rate	3.21%
Senior Notes | Senior Notes Due 2025 EMW
Debt Instrument [Line Items]
Long-term debt gross	$ 36			$ 36
Interest rate	3.49%			3.49%
Senior Notes | Senior Notes Due 2033 EMW
Debt Instrument [Line Items]
Long-term debt gross	$ 60			$ 60
Interest rate	4.06%			4.06%
Senior Notes | Senior Notes Due 2043 EMW
Debt Instrument [Line Items]
Long-term debt gross	$ 150			$ 150
Interest rate	4.74%			4.74%
Senior Notes | Senior Notes Series Due 2022 EMW
Debt Instrument [Line Items]
Long-term debt gross	$ 100			$ 100
Interest rate	3.74%			3.74%
Senior Notes | Senior Notes Due 2021
Debt Instrument [Line Items]
Long-term debt gross			$ 350	$ 350
Interest rate			4.85%	4.85%
Senior Notes | Senior Notes Due 2021 EMW
Debt Instrument [Line Items]
Long-term debt gross				$ 80.9
Interest rate				8.27%
Evergy Kansas Central
Debt Instrument [Line Items]
AdditionalPrincipalFirstMortgageBondsAvailableToBeIssued	$ 998.9
Evergy Kansas Central | Senior Notes | Senior Notes Series A due 2031 EMW
Debt Instrument [Line Items]
Long-term debt gross	0
Evergy Kansas Central | Senior Notes | Senior Notes Series B due 2033 EMW
Debt Instrument [Line Items]
Long-term debt gross	0
Evergy Kansas Central | Senior Notes | Senior Notes Series C due 2036 EMW
Debt Instrument [Line Items]
Long-term debt gross	0
Evergy Kansas Central | Senior Notes | Senior Notes Due 2025 EMW
Debt Instrument [Line Items]
Long-term debt gross	0			$ 0
Evergy Kansas Central | Senior Notes | Senior Notes Due 2033 EMW
Debt Instrument [Line Items]
Long-term debt gross	0			0
Evergy Kansas Central | Senior Notes | Senior Notes Due 2043 EMW
Debt Instrument [Line Items]
Long-term debt gross	0			0
Evergy Kansas Central | Senior Notes | Senior Notes Series Due 2022 EMW
Debt Instrument [Line Items]
Long-term debt gross	0			0
Evergy Kansas Central | Senior Notes | Senior Notes Due 2021
Debt Instrument [Line Items]
Long-term debt gross				0
Evergy Kansas Central | Senior Notes | Senior Notes Due 2021 EMW
Debt Instrument [Line Items]
Long-term debt gross				0
Evergy Metro
Debt Instrument [Line Items]
AdditionalPrincipalFirstMortgageBondsAvailableToBeIssued	$ 5,075.8
Percentage of Bondable Property Allowed	75.00%
Evergy Metro | Senior Notes | Senior Notes Series A due 2031 EMW
Debt Instrument [Line Items]
Long-term debt gross	$ 0
Evergy Metro | Senior Notes | Senior Notes Series B due 2033 EMW
Debt Instrument [Line Items]
Long-term debt gross	0
Evergy Metro | Senior Notes | Senior Notes Series C due 2036 EMW
Debt Instrument [Line Items]
Long-term debt gross	0
Evergy Metro | Senior Notes | Senior Notes Due 2025 EMW
Debt Instrument [Line Items]
Long-term debt gross	0			0
Evergy Metro | Senior Notes | Senior Notes Due 2033 EMW
Debt Instrument [Line Items]
Long-term debt gross	0			0
Evergy Metro | Senior Notes | Senior Notes Due 2043 EMW
Debt Instrument [Line Items]
Long-term debt gross	0			0
Evergy Metro | Senior Notes | Senior Notes Series Due 2022 EMW
Debt Instrument [Line Items]
Long-term debt gross	0			0
Evergy Metro | Senior Notes | Senior Notes Due 2021
Debt Instrument [Line Items]
Long-term debt gross				0
Evergy Metro | Senior Notes | Senior Notes Due 2021 EMW
Debt Instrument [Line Items]
Long-term debt gross				$ 0
Evergy Missouri West | Senior Notes | Senior Notes Series A due 2031 EMW
Debt Instrument [Line Items]
Long-term debt gross			$ 350
Interest rate			2.86%
Evergy Missouri West | Senior Notes | Senior Notes Series B due 2033 EMW
Debt Instrument [Line Items]
Long-term debt gross			$ 75
Interest rate			3.01%
Evergy Missouri West | Senior Notes | Senior Notes Series C due 2036 EMW
Debt Instrument [Line Items]
Long-term debt gross			$ 75
Interest rate			3.21%
Evergy Missouri West | Senior Notes | Senior Notes Due 2025 EMW
Debt Instrument [Line Items]
Long-term debt gross			$ 36
Interest rate			3.49%
Evergy Missouri West | Senior Notes | Senior Notes Due 2033 EMW
Debt Instrument [Line Items]
Long-term debt gross			$ 60
Interest rate			4.06%
Evergy Missouri West | Senior Notes | Senior Notes Due 2043 EMW
Debt Instrument [Line Items]
Long-term debt gross			$ 150
Interest rate			4.74%
Evergy Missouri West | Senior Notes | Senior Notes Series Due 2022 EMW
Debt Instrument [Line Items]
Long-term debt gross			$ 100
Interest rate			3.74%
Evergy Missouri West | Senior Notes | Senior Notes Due 2021 EMW
Debt Instrument [Line Items]
Long-term debt gross		$ 80.9
Interest rate		8.27%
Evergy Kansas South Inc
Debt Instrument [Line Items]
Maximum Amount Of First Mortgage Bonds Authorized	3,500
AdditionalPrincipalFirstMortgageBondsAvailableToBeIssued	$ 2,828.6

LONG-TERM DEBT - Scheduled Matu

LONG-TERM DEBT - Scheduled Maturities (Details) $ in Millions	Dec. 31, 2021USD ($)
Debt Instrument [Line Items]
2022	$ 387.5
2023	439.5
2024	800
2025	636
2026	350
Evergy Kansas Central
Debt Instrument [Line Items]
2022	0
2023	50
2024	0
2025	250
2026	350
Evergy Metro
Debt Instrument [Line Items]
2022	0
2023	379.5
2024	0
2025	350
2026	$ 0

FAIR VALUE MEASUREMENTS - Narra

FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($) $ in Millions	1 Months Ended	10 Months Ended	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Payment for settlement of interest rate swap accounted for as a cash flow hedge	$ 69.8		$ 0	$ 0	$ 69.8
Notional amount	500	$ 500
Other comprehensive loss		69.8	0	0	64.4
Interest expense			(372.6)	(383.9)	(374)
Income tax benefit			(117.4)	(102.2)	(97)
Accumulated other comprehensive loss over the next twelve months			5.4
Senior Notes Due 2029 Evergy | Senior Notes
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt issued	$ 800	$ 800
Interest rate	2.90%	2.90%
Debt Instrument, Term		10 years
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Interest expense			7	7	2
Income tax benefit			$ (1.5)	$ (4)	$ (0.5)

FAIR VALUE MEASUREMENTS - Long-

FAIR VALUE MEASUREMENTS - Long-Term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total nuclear decommissioning trust	$ 768.7	$ 652.1
Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total nuclear decommissioning trust	48.2	47.8
Fair Value, Measurements, Recurring | NAV
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total nuclear decommissioning trust	61.8	43.7
Book Value | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	9,687.2	9,627.3
Book Value | Fair Value, Measurements, Recurring | Variable Interest Entities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	0	18.8
Fair Value | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	10,758.5	11,274.2
Fair Value | Fair Value, Measurements, Recurring | Level 2 | Variable Interest Entities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	0	19.1
Evergy Kansas Central | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total nuclear decommissioning trust	368.4	309.8
Evergy Kansas Central | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total nuclear decommissioning trust	0	0
Evergy Kansas Central | Fair Value, Measurements, Recurring | NAV
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total nuclear decommissioning trust	61.8	43.7
Evergy Kansas Central | Fair Value, Measurements, Recurring | NAV | Nuclear decommissioning trust:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total nuclear decommissioning trust	61.8	43.7
Evergy Kansas Central | Book Value | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	3,934.2	3,931.5
Evergy Kansas Central | Book Value | Fair Value, Measurements, Recurring | Variable Interest Entities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	0	18.8
Evergy Kansas Central | Fair Value | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	4,522.5	4,801.7
Evergy Kansas Central | Fair Value | Fair Value, Measurements, Recurring | Level 2 | Variable Interest Entities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	0	19.1
Evergy Metro | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total nuclear decommissioning trust	400.3	342.3
Evergy Metro | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total nuclear decommissioning trust	48.2	47.8
Evergy Metro | Fair Value, Measurements, Recurring | NAV
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total nuclear decommissioning trust	0	0
Evergy Metro | Book Value | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	2,925	2,923
Evergy Metro | Fair Value | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	3,400.8	3,591.2
Long-Term debt fair value adjustment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt gross	97.9	110.4
Long-Term debt fair value adjustment | Evergy Kansas Central
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt gross	0	0
Long-Term debt fair value adjustment | Evergy Metro
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt gross	$ 0	$ 0

FAIR VALUE MEASUREMENTS - Recur

FAIR VALUE MEASUREMENTS - Recurring (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Assets
Equity securities	$ 31.4
Total nuclear decommissioning trust	768.7	$ 652.1
Total rabbi trust	44.2	46.3
Total self-insured health plan trust	12.5	13.2
Total Assets	856.8	711.6
Level 1
Assets
Equity securities	0
Total nuclear decommissioning trust	658.7	560.6
Total rabbi trust	44.2	0.5
Total self-insured health plan trust	6.5	8
Total Assets	709.4	569.1
Level 2
Assets
Equity securities	31.4
Total nuclear decommissioning trust	48.2	47.8
Total rabbi trust	0	0
Total self-insured health plan trust	6	5.2
Total Assets	85.6	53
Level 3
Assets
Equity securities	0
Total nuclear decommissioning trust	0	0
Total rabbi trust	0	0
Total self-insured health plan trust	0	0
Total Assets	0	0
NAV
Assets
Equity securities	0
Total nuclear decommissioning trust	61.8	43.7
Total rabbi trust	0	45.8
Total self-insured health plan trust	0	0
Total Assets	61.8	89.5
Evergy Kansas Central
Assets
Total nuclear decommissioning trust	368.4	309.8
Total rabbi trust	31.7	32.7
Total Assets	400.1	342.5
Evergy Kansas Central | Core bond fund
Assets
Total nuclear decommissioning trust	58.1	40.6
Total rabbi trust		25.6
Evergy Kansas Central | High-yield bond fund
Assets
Total nuclear decommissioning trust	29.6	25
Evergy Kansas Central | Emerging markets bond fund
Assets
Total nuclear decommissioning trust	18	21
Evergy Kansas Central | Combination debt/equity/other fund
Assets
Total nuclear decommissioning trust		20.1
Total rabbi trust	2.4	7.1
Evergy Kansas Central | Alternative investments fund
Assets
Total nuclear decommissioning trust	32.7	23.2
Evergy Kansas Central | Real estate securities fund
Assets
Total nuclear decommissioning trust	15.2	12.9
Evergy Kansas Central | Cash equivalents
Assets
Total nuclear decommissioning trust	0.4	0.5
Total rabbi trust	0.2
Evergy Kansas Central | Equity funds
Assets
Total rabbi trust	9.5
Evergy Kansas Central | Fixed income funds
Assets
Total rabbi trust	19.6
Evergy Kansas Central | Level 1
Assets
Total nuclear decommissioning trust	306.6	266.1
Total rabbi trust	31.7	0
Total Assets	338.3	266.1
Evergy Kansas Central | Level 1 | Core bond fund
Assets
Total nuclear decommissioning trust	58.1	40.6
Total rabbi trust		0
Evergy Kansas Central | Level 1 | High-yield bond fund
Assets
Total nuclear decommissioning trust	29.6	25
Evergy Kansas Central | Level 1 | Emerging markets bond fund
Assets
Total nuclear decommissioning trust	18	21
Evergy Kansas Central | Level 1 | Combination debt/equity/other fund
Assets
Total nuclear decommissioning trust		20.1
Total rabbi trust	2.4	0
Evergy Kansas Central | Level 1 | Alternative investments fund
Assets
Total nuclear decommissioning trust	0	0
Evergy Kansas Central | Level 1 | Real estate securities fund
Assets
Total nuclear decommissioning trust	0	0
Evergy Kansas Central | Level 1 | Cash equivalents
Assets
Total nuclear decommissioning trust	0.4	0.5
Total rabbi trust	0.2
Evergy Kansas Central | Level 1 | Equity funds
Assets
Total rabbi trust	9.5
Evergy Kansas Central | Level 1 | Fixed income funds
Assets
Total rabbi trust	19.6
Evergy Kansas Central | Level 2
Assets
Total nuclear decommissioning trust	0	0
Total rabbi trust	0	0
Total Assets	0	0
Evergy Kansas Central | Level 2 | Core bond fund
Assets
Total nuclear decommissioning trust	0	0
Total rabbi trust		0
Evergy Kansas Central | Level 2 | High-yield bond fund
Assets
Total nuclear decommissioning trust	0	0
Evergy Kansas Central | Level 2 | Emerging markets bond fund
Assets
Total nuclear decommissioning trust	0	0
Evergy Kansas Central | Level 2 | Combination debt/equity/other fund
Assets
Total nuclear decommissioning trust		0
Total rabbi trust	0	0
Evergy Kansas Central | Level 2 | Alternative investments fund
Assets
Total nuclear decommissioning trust	0	0
Evergy Kansas Central | Level 2 | Real estate securities fund
Assets
Total nuclear decommissioning trust	0	0
Evergy Kansas Central | Level 2 | Cash equivalents
Assets
Total nuclear decommissioning trust	0	0
Total rabbi trust	0
Evergy Kansas Central | Level 2 | Equity funds
Assets
Total rabbi trust	0
Evergy Kansas Central | Level 2 | Fixed income funds
Assets
Total rabbi trust	0
Evergy Kansas Central | Level 3
Assets
Total nuclear decommissioning trust	0	0
Total rabbi trust	0	0
Total Assets	0	0
Evergy Kansas Central | Level 3 | Core bond fund
Assets
Total nuclear decommissioning trust	0	0
Total rabbi trust		0
Evergy Kansas Central | Level 3 | High-yield bond fund
Assets
Total nuclear decommissioning trust	0	0
Evergy Kansas Central | Level 3 | Emerging markets bond fund
Assets
Total nuclear decommissioning trust	0	0
Evergy Kansas Central | Level 3 | Combination debt/equity/other fund
Assets
Total nuclear decommissioning trust		0
Total rabbi trust	0	0
Evergy Kansas Central | Level 3 | Alternative investments fund
Assets
Total nuclear decommissioning trust	0	0
Evergy Kansas Central | Level 3 | Real estate securities fund
Assets
Total nuclear decommissioning trust	0	0
Evergy Kansas Central | Level 3 | Cash equivalents
Assets
Total nuclear decommissioning trust	0	0
Total rabbi trust	0
Evergy Kansas Central | Level 3 | Equity funds
Assets
Total rabbi trust	0
Evergy Kansas Central | Level 3 | Fixed income funds
Assets
Total rabbi trust	0
Evergy Kansas Central | NAV
Assets
Total nuclear decommissioning trust	61.8	43.7
Total rabbi trust	0	32.7
Total Assets	61.8	76.4
Evergy Kansas Central | NAV | Core bond fund
Assets
Total nuclear decommissioning trust	0	0
Total rabbi trust	0	25.6
Evergy Kansas Central | NAV | High-yield bond fund
Assets
Total nuclear decommissioning trust	0	0
Evergy Kansas Central | NAV | Emerging markets bond fund
Assets
Total nuclear decommissioning trust	0	0
Evergy Kansas Central | NAV | Combination debt/equity/other fund
Assets
Total nuclear decommissioning trust		0
Total rabbi trust	0	7.1
Evergy Kansas Central | NAV | Alternative investments fund
Assets
Total nuclear decommissioning trust	32.7	23.2
Evergy Kansas Central | NAV | Real estate securities fund
Assets
Total nuclear decommissioning trust	15.2	12.9
Evergy Kansas Central | NAV | Cash equivalents
Assets
Total nuclear decommissioning trust	0	0
Total rabbi trust	0
Evergy Kansas Central | NAV | Equity funds
Assets
Total rabbi trust	0
Evergy Kansas Central | NAV | Fixed income funds
Assets
Total rabbi trust	0
Evergy Kansas Central | Domestic | Equity securities
Assets
Total nuclear decommissioning trust	140.4	102.7
Evergy Kansas Central | Domestic | Level 1 | Equity securities
Assets
Total nuclear decommissioning trust	126.5	95.1
Evergy Kansas Central | Domestic | Level 2 | Equity securities
Assets
Total nuclear decommissioning trust	0	0
Evergy Kansas Central | Domestic | Level 3 | Equity securities
Assets
Total nuclear decommissioning trust	0	0
Evergy Kansas Central | Domestic | NAV | Equity securities
Assets
Total nuclear decommissioning trust	13.9	7.6
Evergy Kansas Central | International | Equity securities
Assets
Total nuclear decommissioning trust	74	63.8
Evergy Kansas Central | International | Level 1 | Equity securities
Assets
Total nuclear decommissioning trust	74	63.8
Evergy Kansas Central | International | Level 2 | Equity securities
Assets
Total nuclear decommissioning trust	0	0
Evergy Kansas Central | International | Level 3 | Equity securities
Assets
Total nuclear decommissioning trust	0	0
Evergy Kansas Central | International | NAV | Equity securities
Assets
Total nuclear decommissioning trust	0	0
Evergy Metro
Assets
Total nuclear decommissioning trust	400.3	342.3
Total self-insured health plan trust	12.5	13.2
Total Assets	412.8	355.5
Evergy Metro | Equity securities
Assets
Total nuclear decommissioning trust	299.2	243.1
Total self-insured health plan trust	2	1.7
Evergy Metro | Cash equivalents
Assets
Total nuclear decommissioning trust	6.8	3.2
Evergy Metro | U.S. Treasury
Assets
Total nuclear decommissioning trust	46.1	47.7
Evergy Metro | U.S. Agency
Assets
Total nuclear decommissioning trust	0.4	0.5
Evergy Metro | State and local obligations
Assets
Total nuclear decommissioning trust	4	4.1
Evergy Metro | Corporate bonds
Assets
Total nuclear decommissioning trust	43.7	43.1
Evergy Metro | Foreign governments
Assets
Total nuclear decommissioning trust	0.1	0.1
Evergy Metro | Other
Assets
Total nuclear decommissioning trust	0	0.5
Evergy Metro | Debt securities
Assets
Total self-insured health plan trust	8.7	8
Evergy Metro | Cash and cash equivalents
Assets
Total self-insured health plan trust	1.8	3.5
Evergy Metro | Level 1
Assets
Total nuclear decommissioning trust	352.1	294.5
Total self-insured health plan trust	6.5	8
Total Assets	358.6	302.5
Evergy Metro | Level 1 | Equity securities
Assets
Total nuclear decommissioning trust	299.2	243.1
Total self-insured health plan trust	2	1.7
Evergy Metro | Level 1 | Cash equivalents
Assets
Total nuclear decommissioning trust	6.8	3.2
Evergy Metro | Level 1 | U.S. Treasury
Assets
Total nuclear decommissioning trust	46.1	47.7
Evergy Metro | Level 1 | U.S. Agency
Assets
Total nuclear decommissioning trust	0	0
Evergy Metro | Level 1 | State and local obligations
Assets
Total nuclear decommissioning trust	0	0
Evergy Metro | Level 1 | Corporate bonds
Assets
Total nuclear decommissioning trust	0	0
Evergy Metro | Level 1 | Foreign governments
Assets
Total nuclear decommissioning trust	0	0
Evergy Metro | Level 1 | Other
Assets
Total nuclear decommissioning trust	0	0.5
Evergy Metro | Level 1 | Debt securities
Assets
Total self-insured health plan trust	2.7	2.8
Evergy Metro | Level 1 | Cash and cash equivalents
Assets
Total self-insured health plan trust	1.8	3.5
Evergy Metro | Level 2
Assets
Total nuclear decommissioning trust	48.2	47.8
Total self-insured health plan trust	6	5.2
Total Assets	54.2	53
Evergy Metro | Level 2 | Equity securities
Assets
Total nuclear decommissioning trust	0	0
Total self-insured health plan trust	0	0
Evergy Metro | Level 2 | Cash equivalents
Assets
Total nuclear decommissioning trust	0	0
Evergy Metro | Level 2 | U.S. Treasury
Assets
Total nuclear decommissioning trust	0	0
Evergy Metro | Level 2 | U.S. Agency
Assets
Total nuclear decommissioning trust	0.4	0.5
Evergy Metro | Level 2 | State and local obligations
Assets
Total nuclear decommissioning trust	4	4.1
Evergy Metro | Level 2 | Corporate bonds
Assets
Total nuclear decommissioning trust	43.7	43.1
Evergy Metro | Level 2 | Foreign governments
Assets
Total nuclear decommissioning trust	0.1	0.1
Evergy Metro | Level 2 | Other
Assets
Total nuclear decommissioning trust	0	0
Evergy Metro | Level 2 | Debt securities
Assets
Total self-insured health plan trust	6	5.2
Evergy Metro | Level 2 | Cash and cash equivalents
Assets
Total self-insured health plan trust	0	0
Evergy Metro | Level 3
Assets
Total nuclear decommissioning trust	0	0
Total self-insured health plan trust	0	0
Total Assets	0	0
Evergy Metro | Level 3 | Equity securities
Assets
Total nuclear decommissioning trust	0	0
Total self-insured health plan trust	0	0
Evergy Metro | Level 3 | Cash equivalents
Assets
Total nuclear decommissioning trust	0	0
Evergy Metro | Level 3 | U.S. Treasury
Assets
Total nuclear decommissioning trust	0	0
Evergy Metro | Level 3 | U.S. Agency
Assets
Total nuclear decommissioning trust	0	0
Evergy Metro | Level 3 | State and local obligations
Assets
Total nuclear decommissioning trust	0	0
Evergy Metro | Level 3 | Corporate bonds
Assets
Total nuclear decommissioning trust	0	0
Evergy Metro | Level 3 | Foreign governments
Assets
Total nuclear decommissioning trust	0	0
Evergy Metro | Level 3 | Other
Assets
Total nuclear decommissioning trust	0	0
Evergy Metro | Level 3 | Debt securities
Assets
Total self-insured health plan trust	0	0
Evergy Metro | Level 3 | Cash and cash equivalents
Assets
Total self-insured health plan trust	0	0
Evergy Metro | NAV
Assets
Total nuclear decommissioning trust	0	0
Total self-insured health plan trust	0	0
Total Assets	0	0
Evergy Metro | NAV | Equity securities
Assets
Total nuclear decommissioning trust	0	0
Total self-insured health plan trust	0	0
Evergy Metro | NAV | Cash equivalents
Assets
Total nuclear decommissioning trust	0	0
Evergy Metro | NAV | U.S. Treasury
Assets
Total nuclear decommissioning trust	0	0
Evergy Metro | NAV | U.S. Agency
Assets
Total nuclear decommissioning trust	0	0
Evergy Metro | NAV | State and local obligations
Assets
Total nuclear decommissioning trust	0	0
Evergy Metro | NAV | Corporate bonds
Assets
Total nuclear decommissioning trust	0	0
Evergy Metro | NAV | Foreign governments
Assets
Total nuclear decommissioning trust	0	0
Evergy Metro | NAV | Other
Assets
Total nuclear decommissioning trust	0	0
Evergy Metro | NAV | Debt securities
Assets
Total self-insured health plan trust	0	0
Evergy Metro | NAV | Cash and cash equivalents
Assets
Total self-insured health plan trust	0	0
Other Evergy
Assets
Equity securities	31.4
Total rabbi trust	12.5	13.6
Total Assets	43.9
Other Evergy | Equity securities
Assets
Equity securities	31.4
Other Evergy | Core bond fund
Assets
Total rabbi trust	12.5
Other Evergy | Fixed income funds
Assets
Total rabbi trust		13.1
Other Evergy | Cash and cash equivalents
Assets
Total rabbi trust		0.5
Other Evergy | Level 1
Assets
Equity securities	0
Total rabbi trust	12.5	0.5
Total Assets	12.5
Other Evergy | Level 1 | Equity securities
Assets
Equity securities	0
Other Evergy | Level 1 | Core bond fund
Assets
Total rabbi trust	12.5
Other Evergy | Level 1 | Fixed income funds
Assets
Total rabbi trust		0
Other Evergy | Level 1 | Cash and cash equivalents
Assets
Total rabbi trust		0.5
Other Evergy | Level 2
Assets
Equity securities	31.4
Total rabbi trust	0	0
Total Assets	31.4
Other Evergy | Level 2 | Equity securities
Assets
Equity securities	31.4
Other Evergy | Level 2 | Core bond fund
Assets
Total rabbi trust	0
Other Evergy | Level 2 | Fixed income funds
Assets
Total rabbi trust		0
Other Evergy | Level 2 | Cash and cash equivalents
Assets
Total rabbi trust		0
Other Evergy | Level 3
Assets
Equity securities	0
Total rabbi trust	0	0
Total Assets	0
Other Evergy | Level 3 | Equity securities
Assets
Equity securities	0
Other Evergy | Level 3 | Core bond fund
Assets
Total rabbi trust	0
Other Evergy | Level 3 | Fixed income funds
Assets
Total rabbi trust		0
Other Evergy | Level 3 | Cash and cash equivalents
Assets
Total rabbi trust		0
Other Evergy | NAV
Assets
Equity securities	0
Total rabbi trust	0	13.1
Total Assets	0
Other Evergy | NAV | Equity securities
Assets
Equity securities	0
Other Evergy | NAV | Core bond fund
Assets
Total rabbi trust	$ 0
Other Evergy | NAV | Fixed income funds
Assets
Total rabbi trust		13.1
Other Evergy | NAV | Cash and cash equivalents
Assets
Total rabbi trust		$ 0

FAIR VALUE MEASUREMENTS - NAV (

FAIR VALUE MEASUREMENTS - NAV (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021USD ($)fundextension	Dec. 31, 2020USD ($)
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Commitments	$ 1.7	$ 2.2
Evergy Kansas Central | Alternative investments fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Commitments	0	0
Evergy Kansas Central | Real estate securities fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Commitments	0	0
Evergy Kansas Central | Nuclear decommissioning trust:
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Commitments	1.7	2.2
Evergy Kansas Central | Core bond fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Commitments	0	0
Evergy Kansas Central | Combination debt/equity/other fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Commitments	0	0
Evergy Kansas Central | Rabbi trust:
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Commitments	0	0
Other Evergy
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Commitments	0	0
Domestic | Evergy Kansas Central | Equity securities
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Commitments	$ 1.7	2.2
NAV, number of funds | fund	5
NAV, number of funds making distributions | fund	3
Domestic | Evergy Kansas Central | Equity Securities - Fourth Fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Length of settlement	15 years
NAV, number of extensions | extension	3
NAV, extension term	1 year
Domestic | Evergy Kansas Central | Equity Securities - Fifth Fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Length of settlement	15 years
Fair Value, Measurements, Recurring
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust	$ 768.7	652.1
Total rabbi trust	44.2	46.3
Total Assets	856.8	711.6
Fair Value, Measurements, Recurring | Evergy Kansas Central
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust	368.4	309.8
Total rabbi trust	31.7	32.7
Total Assets	400.1	342.5
Fair Value, Measurements, Recurring | Evergy Kansas Central | Alternative investments fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust	32.7	23.2
Fair Value, Measurements, Recurring | Evergy Kansas Central | Real estate securities fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust	15.2	12.9
Fair Value, Measurements, Recurring | Evergy Kansas Central | Core bond fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust	58.1	40.6
Total rabbi trust		25.6
Fair Value, Measurements, Recurring | Evergy Kansas Central | Combination debt/equity/other fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust		20.1
Total rabbi trust	2.4	7.1
Fair Value, Measurements, Recurring | Other Evergy
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total rabbi trust	12.5	13.6
Total Assets	43.9
Fair Value, Measurements, Recurring | Other Evergy | Core bond fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total rabbi trust	12.5
Fair Value, Measurements, Recurring | Domestic | Evergy Kansas Central | Equity securities
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust	140.4	102.7
NAV | Fair Value, Measurements, Recurring
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust	61.8	43.7
Total rabbi trust	0	45.8
Total Assets	61.8	89.5
NAV | Fair Value, Measurements, Recurring | Evergy Kansas Central
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust	61.8	43.7
Total rabbi trust	0	32.7
Total Assets	61.8	76.4
NAV | Fair Value, Measurements, Recurring | Evergy Kansas Central | Alternative investments fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust	$ 32.7	23.2
Length of Settlement	65 days
NAV | Fair Value, Measurements, Recurring | Evergy Kansas Central | Real estate securities fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust	$ 15.2	12.9
Length of Settlement	65 days
NAV | Fair Value, Measurements, Recurring | Evergy Kansas Central | Nuclear decommissioning trust:
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust	$ 61.8	43.7
NAV | Fair Value, Measurements, Recurring | Evergy Kansas Central | Core bond fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust	0	0
Total rabbi trust	0	25.6
NAV | Fair Value, Measurements, Recurring | Evergy Kansas Central | Combination debt/equity/other fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust		0
Total rabbi trust	0	7.1
NAV | Fair Value, Measurements, Recurring | Evergy Kansas Central | Rabbi trust:
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total rabbi trust	0	32.7
NAV | Fair Value, Measurements, Recurring | Other Evergy
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total rabbi trust	0	13.1
Total Assets	0
NAV | Fair Value, Measurements, Recurring | Other Evergy | Core bond fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total rabbi trust	0
NAV | Fair Value, Measurements, Recurring | Domestic | Evergy Kansas Central | Equity securities
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust	$ 13.9	$ 7.6

FAIR VALUE MEASUREMENTS - Gains

FAIR VALUE MEASUREMENTS - Gains (Losses) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Unrealized gain (losses)	$ 95.5	$ 45.2	$ 82.2
Nuclear decommissioning trust - equity securities
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Unrealized gain (losses)	101.8	45.5	74
Nuclear decommissioning trust - debt securities
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Unrealized gain (losses)	(4.5)	5.3	5.1
Rabbi trusts - equity securities
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Unrealized gain (losses)	(1.8)	(5.6)	3.1
Evergy Kansas Central
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Unrealized gain (losses)	49.1	15.8	36.5
Evergy Kansas Central | Nuclear decommissioning trust - equity securities
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Unrealized gain (losses)	50.5	21.9	33.3
Evergy Kansas Central | Rabbi trusts - equity securities
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Unrealized gain (losses)	(1.4)	(6.1)	3.2
Evergy Metro
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Unrealized gain (losses)	46.8	28.9	45.8
Evergy Metro | Nuclear decommissioning trust - equity securities
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Unrealized gain (losses)	51.3	23.6	40.7
Evergy Metro | Nuclear decommissioning trust - debt securities
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Unrealized gain (losses)	$ (4.5)	$ 5.3	$ 5.1

COMMITMENTS AND CONTINGENCIES -

COMMITMENTS AND CONTINGENCIES - Narrative (Details) $ in Millions	Dec. 31, 2021USD ($)
Estimates Of Environmental Financial Impact And Related Issues [Line Items]
Industry aggregate limit for nuclear insurance	$ 3,200
Industry aggregate limit for non nuclear insurance	1,800
Nuclear liability insurance, full limit of public liability	13,600
Nuclear liability insurance, maximum available commercial insurance	500
Nuclear liability insurance, industry wide retrospective assessment program	13,100
Nuclear liability insurance, owners insurance amount, maximum	137.6
Nuclear liability insurance, owners insurance, amount per incident	20.5
Nuclear liability insurance, owners property insurance, maximum	2,800
Nuclear liability insurance, owners nonnuclear property insurance, maximum	2,300
Nuclear liability insurance, owners property insurance assessment, maximum	30
Evergy
Estimates Of Environmental Financial Impact And Related Issues [Line Items]
Nuclear liability insurance, owners insurance amount, maximum	129.4
Nuclear liability insurance, owners insurance, amount per incident	19.2
Nuclear liability insurance, owners property insurance assessment, maximum	28.2
Evergy Kansas Central
Estimates Of Environmental Financial Impact And Related Issues [Line Items]
Nuclear liability insurance, owners insurance amount, maximum	64.7
Nuclear liability insurance, owners insurance, amount per incident	9.6
Nuclear liability insurance, owners property insurance assessment, maximum	14.1
Evergy Metro
Estimates Of Environmental Financial Impact And Related Issues [Line Items]
Nuclear liability insurance, owners insurance amount, maximum	64.7
Nuclear liability insurance, owners insurance, amount per incident	9.6
Nuclear liability insurance, owners property insurance assessment, maximum	$ 14.1

COMMITMENTS AND CONTINGENCIES_2

COMMITMENTS AND CONTINGENCIES - Contractual Commitments (Details) $ in Millions	Dec. 31, 2021USD ($)
Unrecorded Unconditional Purchase Obligations and Lease Commitments [Line Items]
2022	$ 466.1
2023	247.1
2024	188.2
2025	158.8
2026	165.1
After 2026	515.3
Total	1,740.6
Fuel
Unrecorded Unconditional Purchase Obligations and Lease Commitments [Line Items]
2022	403.1
2023	183.5
2024	130.2
2025	100.4
2026	106.7
After 2026	221.1
Total	1,145
Power
Unrecorded Unconditional Purchase Obligations and Lease Commitments [Line Items]
2022	63
2023	63.6
2024	58
2025	58.4
2026	58.4
After 2026	294.2
Total	595.6
Evergy Kansas Central
Unrecorded Unconditional Purchase Obligations and Lease Commitments [Line Items]
2022	233.3
2023	103.5
2024	84.2
2025	70.3
2026	73.5
After 2026	124.9
Total	689.7
Evergy Kansas Central | Fuel
Unrecorded Unconditional Purchase Obligations and Lease Commitments [Line Items]
2022	232.4
2023	102.6
2024	83.3
2025	69.4
2026	72.6
After 2026	121.3
Total	681.6
Evergy Kansas Central | Power
Unrecorded Unconditional Purchase Obligations and Lease Commitments [Line Items]
2022	0.9
2023	0.9
2024	0.9
2025	0.9
2026	0.9
After 2026	3.6
Total	8.1
Evergy Metro
Unrecorded Unconditional Purchase Obligations and Lease Commitments [Line Items]
2022	180.4
2023	109
2024	72.5
2025	57.6
2026	60.6
After 2026	266.7
Total	746.8
Evergy Metro | Fuel
Unrecorded Unconditional Purchase Obligations and Lease Commitments [Line Items]
2022	145.3
2023	73.7
2024	43.3
2025	28.4
2026	31.4
After 2026	99.8
Total	421.9
Evergy Metro | Power
Unrecorded Unconditional Purchase Obligations and Lease Commitments [Line Items]
2022	35.1
2023	35.3
2024	29.2
2025	29.2
2026	29.2
After 2026	166.9
Total	$ 324.9

GUARANTEES (Details)

GUARANTEES (Details) $ in Millions	Dec. 31, 2021USD ($)
Guarantor Obligations [Line Items]
Maximum exposure	$ 904
Commercial Paper | Evergy Missouri West
Guarantor Obligations [Line Items]
Maximum exposure	395.3
Guarantee | Evergy Kansas Central
Guarantor Obligations [Line Items]
Maximum exposure	48
Guarantee | Evergy Metro
Guarantor Obligations [Line Items]
Maximum exposure	48
Guarantee of Indebtedness of Others | Evergy Missouri West
Guarantor Obligations [Line Items]
Maximum exposure	$ 856

RELATED PARTY TRANSACTIONS AN_3

RELATED PARTY TRANSACTIONS AND RELATIONSHIPS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Evergy Metro | Evergy Inc Money Pool
Related Party Transaction [Line Items]
Due from Related Parties, Current	$ 155	$ 100
Evergy Metro | Evergy Missouri West
Related Party Transaction [Line Items]
Due from (to) related parties	254.5	188.1
Evergy Metro | Evergy Missouri West | Operating Expenses and Capital Costs Billed
Related Party Transaction [Line Items]
Related party transaction	142.1	168.7	$ 172.8
Evergy Metro | Evergy Kansas Central
Related Party Transaction [Line Items]
Due from (to) related parties	14.5	21.7
Evergy Metro | Evergy Kansas Central | Operating Expenses and Capital Costs Billed
Related Party Transaction [Line Items]
Related party transaction	134.7	130.8	154.9
Evergy Metro | Evergy
Related Party Transaction [Line Items]
Due from (to) related parties	8.7	15.7
Evergy Metro | Evergy | Income Tax Receivable
Related Party Transaction [Line Items]
Due from (to) related parties		(3.2)
Evergy Metro | Evergy | Income Taxes Payable
Related Party Transaction [Line Items]
Due from (to) related parties	(2.5)
Evergy Kansas Central | Evergy Missouri West
Related Party Transaction [Line Items]
Due from (to) related parties	10.4	6.6
Evergy Kansas Central | Evergy Missouri West | Operating Expenses and Capital Costs Billed
Related Party Transaction [Line Items]
Related party transaction	32.5	37.6	24.9
Evergy Kansas Central | Evergy Metro
Related Party Transaction [Line Items]
Due from (to) related parties	(14.5)	(21.7)
Evergy Kansas Central | Evergy Metro | Operating Expenses and Capital Costs Billed
Related Party Transaction [Line Items]
Related party transaction	29.4	34.7	$ 40.6
Evergy Kansas Central | Evergy
Related Party Transaction [Line Items]
Due from (to) related parties	(2.2)	0.1
Evergy Kansas Central | Evergy | Income Tax Receivable
Related Party Transaction [Line Items]
Due from (to) related parties	$ 9.6	$ 25.3
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%

SHAREHOLDERS' EQUITY - Narrativ

SHAREHOLDERS' EQUITY - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	12 Months Ended
	Apr. 30, 2021	Dec. 31, 2021	Feb. 28, 2021
Line of Credit Facility [Line Items]
Preferred stock, shares authorized (in shares)		12,000,000
Stock to be Sold and Issued Under Securities Purchase Agreement, Shares			2,269,447
Stock to be Sold and Issued Under Securities Purchase Agreement, Value			$ 113.2
Warrant to be Issued Under Securities Purchase Agreement for Potential Shares, Maximum			3,950,000
Warrants and Rights Outstanding, Term			3 years
Class of Warrant or Right, Exercise Price of Warrants or Rights			$ 64.70
Restriction on payment of dividends (at least)		35.00%
Restricted net assets of subsidiaries		$ 5,700
Issuance of stock, net of issuance costs	$ 112.5	$ 112.5
Stock issuance costs	$ 0.7
Evergy Kansas Central
Line of Credit Facility [Line Items]
Restriction on payment of dividends (at least)		40.00%
Evergy Metro
Line of Credit Facility [Line Items]
Restriction on payment of dividends (at least)		40.00%
Retained earnings restrictions		$ 386.9

VARIABLE INTEREST ENTITIES - Na

VARIABLE INTEREST ENTITIES - Narrative (Details)	1 Months Ended		3 Months Ended	12 Months Ended
	Aug. 31, 2019	Jul. 31, 2017	Mar. 31, 2020	Dec. 31, 2021
Jeffrey Energy Center
Variable Interest Entity [Line Items]
VIE ownership percentage	8.00%	8.00%	8.00%	8.00%
La Cygne Unit 2 [Member]
Variable Interest Entity [Line Items]
VIE ownership percentage				50.00%
Evergy Kansas Central | Jeffrey Energy Center
Variable Interest Entity [Line Items]
VIE ownership percentage	8.00%
Evergy Kansas Central | La Cygne Unit 2 [Member]
Variable Interest Entity [Line Items]
VIE ownership percentage				50.00%

VARIABLE INTEREST ENTITIES - As

VARIABLE INTEREST ENTITIES - Assets and Liabilities Related to VIE (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Assets:
Property, plant and equipment, net	$ 21,002.6	$ 19,951
Liabilities:
Current maturities of long-term debt	389.3	436.4
Accrued interest	118.8	123.4
Long-term debt, net	9,297.9	9,190.9
Variable Interest Entities
Assets:
Property, plant and equipment, net	147.8	154.9
Liabilities:
Current maturities of long-term debt	0	18.8
Accrued interest	0	0.1
Evergy Kansas Central
Assets:
Property, plant and equipment, net	10,548.9	10,193.6
Liabilities:
Current maturities of long-term debt	0	0
Accrued interest	71.5	72.8
Long-term debt, net	3,934.2	3,931.5
Evergy Kansas Central | Variable Interest Entities
Assets:
Property, plant and equipment, net	147.8	154.9
Liabilities:
Current maturities of long-term debt	$ 0	$ 18.8

TAXES - Income Tax Expense (Det

TAXES - Income Tax Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current income taxes
Federal	$ 15.6	$ (26.8)	$ (39.5)
State	(0.4)	2.1	15
Total	15.2	(24.7)	(24.5)
Deferred income taxes
Federal	92.8	73.1	93.2
State	14.7	59.8	27.5
Total	107.5	132.9	120.7
Investment Tax Credits
Amortization	(5.7)	(6)	(4.4)
Deferral	0.4	0	5.2
Total	(5.3)	(6)	0.8
Income tax expense (benefit)	$ 117.4	$ 102.2	$ 97
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Federal statutory income tax rate	21.00%	21.00%	21.00%
Effect of:
COLI policies	(1.00%)	(1.60%)	(1.80%)
State income taxes	1.00%	4.30%	5.00%
Flow through depreciation for plant-related differences	(5.40%)	(5.30%)	(4.50%)
Federal tax credits	(2.80%)	(4.60%)	(4.90%)
Non-controlling interest	(0.30%)	(0.30%)	(0.40%)
AFUDC equity	(0.60%)	(0.50%)	(0.10%)
Amortization of federal investment tax credits	(0.40%)	(0.60%)	(0.50%)
Changes In Uncertain Tax Positions, Net	0.00%	0.00%	(0.20%)
Federal or state tax rate change	0.00%	1.90%	0.00%
Valuation allowance	0.00%	(0.20%)	(1.00%)
Stock compensation	0.00%	(0.10%)	0.10%
Officer compensation limitation	0.50%	0.20%	0.10%
Other	(0.40%)	(0.20%)	(0.40%)
Effective income tax rate	11.60%	14.00%	12.40%
Evergy Kansas Central
Current income taxes
Federal	$ 53.3	$ 14.5	$ 37.9
State	(0.2)	(5.3)	2.6
Total	53.1	9.2	40.5
Deferred income taxes
Federal	3.8	(16.7)	(8.9)
State	(1.2)	168.1	18.4
Total	2.6	151.4	9.5
Investment Tax Credits
Amortization	(4.3)	(4.8)	(3.1)
Deferral	0.3	0	5.2
Total	(4)	(4.8)	2.1
Income tax expense (benefit)	$ 51.7	$ 155.8	$ 52.1
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Federal statutory income tax rate	21.00%	21.00%	21.00%
Effect of:
COLI policies	(1.70%)	(2.80%)	(3.30%)
State income taxes	(0.40%)	3.80%	5.30%
Flow through depreciation for plant-related differences	(3.00%)	(0.10%)	(0.10%)
Federal tax credits	(5.00%)	(7.10%)	(7.40%)
Non-controlling interest	(0.50%)	(0.60%)	(0.80%)
AFUDC equity	(0.60%)	(0.50%)	(0.10%)
Amortization of federal investment tax credits	(0.50%)	(0.70%)	(0.70%)
Changes In Uncertain Tax Positions, Net	0.00%	0.00%	(0.40%)
Federal or state tax rate change	0.00%	27.80%	0.00%
Valuation allowance	0.00%	0.00%	(0.40%)
Stock compensation	(0.10%)	(0.10%)	(0.10%)
Officer compensation limitation	0.30%	0.00%	0.00%
Other	(0.10%)	(0.90%)	(0.30%)
Effective income tax rate	9.40%	39.80%	12.70%
Evergy Metro
Current income taxes
Federal	$ 39.2	$ (0.2)	$ 43.9
State	3.2	10.8	22.4
Total	42.4	10.6	66.3
Deferred income taxes
Federal	6.5	29.8	(24.5)
State	4.8	(32.2)	(5)
Total	11.3	(2.4)	(29.5)
Investment Tax Credits
Amortization	(1.3)	(1.1)	(1.1)
Total	(1.3)	(1.1)	(1.1)
Income tax expense (benefit)	$ 52.4	$ 7.1	$ 35.7
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Federal statutory income tax rate	21.00%	21.00%	21.00%
Effect of:
COLI policies	(0.20%)	(0.30%)	(0.20%)
State income taxes	1.70%	4.90%	4.70%
Flow through depreciation for plant-related differences	(7.80%)	(10.00%)	(9.40%)
Federal tax credits	(0.20%)	(1.90%)	(2.50%)
AFUDC equity	(0.70%)	(0.50%)	(0.20%)
Amortization of federal investment tax credits	(0.40%)	(0.40%)	(0.40%)
Federal or state tax rate change	0.00%	(10.50%)	0.00%
Stock compensation	0.00%	(0.40%)	0.00%
Officer compensation limitation	0.90%	0.40%	0.30%
Other	0.10%	0.00%	(1.00%)
Effective income tax rate	14.40%	2.30%	12.30%

TAXES - Deferred Income Taxes (

TAXES - Deferred Income Taxes (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Tax credit carryforward	$ 375.2	$ 379.6
Income taxes refundable to customers, net	336.6	418.2
Deferred employee benefit costs	158.3	227.6
Net operating loss carryforward	40.2	51
Deferred state income taxes	146.9	145.9
Accrued liabilities	157.6	152.7
Other	200	181
Total deferred tax assets before valuation allowance	1,414.8	1,556
Valuation allowances	(12.8)	(14.4)
Total deferred tax assets, net	1,402	1,541.6
Deferred tax liabilities:
Plant-related	(2,701.1)	(2,693.7)
Deferred employee benefit costs	(96.8)	(171.4)
ARO regulatory assets	(133.7)	(136.7)
Acquisition premium	(43.9)	(46.9)
Other regulatory assets	(152.1)	(28.8)
Other	(136.3)	(128.9)
Total deferred tax liabilities	(3,263.9)	(3,206.4)
Net deferred income tax liabilities	(1,861.9)	(1,664.8)
Evergy Kansas Central
Deferred tax assets:
Tax credit carryforward	206.3	176.5
Income taxes refundable to customers, net	168.5	237.5
Deferred employee benefit costs	84.8	105.4
Net operating loss carryforward	0	0
Deferred state income taxes	101	101.7
Accrued liabilities	71.3	61.8
Other	100.6	91.4
Total deferred tax assets before valuation allowance	732.5	774.3
Valuation allowances	0	0
Total deferred tax assets, net	732.5	774.3
Deferred tax liabilities:
Plant-related	(1,308.7)	(1,341.2)
Deferred employee benefit costs	(52.9)	(75.6)
ARO regulatory assets	(53.9)	(49.9)
Acquisition premium	(43.9)	(46.9)
Other regulatory assets	(53.3)	(2.8)
Other	(87.7)	(82.4)
Total deferred tax liabilities	(1,600.4)	(1,598.8)
Net deferred income tax liabilities	(867.9)	(824.5)
Evergy Metro
Deferred tax assets:
Tax credit carryforward	162.1	195.9
Income taxes refundable to customers, net	123.8	132.8
Deferred employee benefit costs	86.8	117.9
Net operating loss carryforward	0	0.2
Deferred state income taxes	38.6	37.8
Accrued liabilities	56.4	61
Other	59.6	44.8
Total deferred tax assets before valuation allowance	527.3	590.4
Valuation allowances	0	0
Total deferred tax assets, net	527.3	590.4
Deferred tax liabilities:
Plant-related	(996.7)	(972.1)
Deferred employee benefit costs	(43.5)	(76.3)
ARO regulatory assets	(49.9)	(54.3)
Acquisition premium	0	0
Other regulatory assets	(20.4)	(16.4)
Other	(22.9)	(30.1)
Total deferred tax liabilities	(1,133.4)	(1,149.2)
Net deferred income tax liabilities	$ (606.1)	$ (558.8)

TAXES - Tax Credit Carryforward

TAXES - Tax Credit Carryforwards (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	$ 373.6
Evergy Kansas Central
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	204.7
Evergy Metro
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	162.1
General Business Tax Credit Carryforward
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	373.6	$ 379.6
Amount of tax credit acquired in business combination	0.1
Valuation allowance	0.1
General Business Tax Credit Carryforward | Evergy Kansas Central
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	204.7	176.5
General Business Tax Credit Carryforward | Evergy Metro
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	162.1	$ 195.9
Federal Alternative Minimum Tax Credit Carryforward [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	1.6
2004
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	0.1
2004 | Evergy Kansas Central
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	0
2004 | Evergy Metro
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	0
2005
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	0.1
2005 | Evergy Kansas Central
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	0
2005 | Evergy Metro
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	0
2006
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	0.1
2006 | Evergy Kansas Central
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	0
2006 | Evergy Metro
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	0
2007
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	0.1
2007 | Evergy Kansas Central
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	0
2007 | Evergy Metro
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	0
2009
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	38.2
2009 | Evergy Kansas Central
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	0.2
2009 | Evergy Metro
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	37.9
2010
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	18.3
2010 | Evergy Kansas Central
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	0
2010 | Evergy Metro
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	18.2
2011
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	13.3
2011 | Evergy Kansas Central
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	0
2011 | Evergy Metro
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	13.2
2012
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	12.8
2012 | Evergy Kansas Central
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	2
2012 | Evergy Metro
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	10.7
2013
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	24.3
2013 | Evergy Kansas Central
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	11.3
2013 | Evergy Metro
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	12.9
2014
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	24.1
2014 | Evergy Kansas Central
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	10.7
2014 | Evergy Metro
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	13
2015
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	24.7
2015 | Evergy Kansas Central
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	10.9
2015 | Evergy Metro
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	13.2
2016
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	27.1
2016 | Evergy Kansas Central
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	11
2016 | Evergy Metro
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	12.4
2017
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	43.9
2017 | Evergy Kansas Central
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	35.1
2017 | Evergy Metro
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	8.2
2018
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	43.9
2018 | Evergy Kansas Central
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	36.3
2018 | Evergy Metro
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	7.5
2019
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	37.7
2019 | Evergy Kansas Central
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	30.9
2019 | Evergy Metro
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	6.7
2020
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	35.9
2020 | Evergy Kansas Central
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	28.3
2020 | Evergy Metro
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	7.4
Tax Year 2021
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	29
Tax Year 2021 | Evergy Kansas Central
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	28
Tax Year 2021 | Evergy Metro
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	$ 0.8

TAXES - Net Operating Loss Carr

TAXES - Net Operating Loss Carryforwards (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Operating Loss Carryforwards [Line Items]
Deferred tax benefits	$ 33.6	$ 42.2
Operating loss carryforwards of federal income tax benefit	7.1
Tax credit carryforward, amount	373.6
Federal Alternative Minimum Tax Credit Carryforward
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	1.6
Internal Revenue Service (IRS)
Operating Loss Carryforwards [Line Items]
Tax benefits related to NOLs	7.1
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Deferred tax benefits	6.6	8.8
Operating loss carryforwards of federal income tax benefit	5.6
Evergy Kansas Central
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	204.7
Evergy Metro
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	162.1
Evergy Metro | State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Deferred tax benefits		$ 0.2
2005
Operating Loss Carryforwards [Line Items]
Deferred tax benefits	1.9
Tax credit carryforward, amount	0.1
2005 | Evergy Kansas Central
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	0
2005 | Evergy Metro
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	0
2006
Operating Loss Carryforwards [Line Items]
Deferred tax benefits	31.7
Tax credit carryforward, amount	0.1
2006 | Evergy Kansas Central
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	0
2006 | Evergy Metro
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	0
2014
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	24.1
2014 | Evergy Kansas Central
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	10.7
2014 | Evergy Metro
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	13
2015
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	24.7
2015 | Evergy Kansas Central
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	10.9
2015 | Evergy Metro
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	13.2
2016
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	27.1
2016 | Evergy Kansas Central
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	11
2016 | Evergy Metro
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	12.4
2017
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	43.9
2017 | Evergy Kansas Central
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	35.1
2017 | Evergy Metro
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	$ 8.2

TAXES - Valuation Allowance (De

TAXES - Valuation Allowance (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021USD ($)
Income Tax Disclosure [Abstract]
Tax benefit	$ 1.5

TAXES - State Tax Reform (Detai

TAXES - State Tax Reform (Details) - USD ($) $ in Millions	May 01, 2020	Dec. 31, 2021
State Tax Reform [Line Items]
Decrease in net deferred income tax liabilities due to tax reform	$ 233.8
Decrease in net deferred income tax liabilities for revaluation of deferred income tax assets and liabilities in rate base	400.4
Decrease in net deferred income tax liabilities for tax gross-up adjustment for ratemaking purposes due to tax reform	31.7
Decrease in unamortized investment tax credits	183.6
Decrease in unamortized investment tax credits for tax gross up adjustment for ratemaking purposes	16.9
Income tax expense from tax reform	13.8
Kansas state statutory income tax rate thru 2020		7.00%
Evergy Kansas Central
State Tax Reform [Line Items]
Decrease in net deferred income tax liabilities due to tax reform	17.6
Decrease in net deferred income tax liabilities for revaluation of deferred income tax assets and liabilities in rate base	293.7
Decrease in net deferred income tax liabilities for tax gross-up adjustment for ratemaking purposes due to tax reform	17.3
Decrease in unamortized investment tax credits	183.6
Decrease in unamortized investment tax credits for tax gross up adjustment for ratemaking purposes	16.9
Income tax expense from tax reform	109
Evergy Metro
State Tax Reform [Line Items]
Decrease in net deferred income tax liabilities due to tax reform	152.9
Decrease in net deferred income tax liabilities for revaluation of deferred income tax assets and liabilities in rate base	106.7
Decrease in net deferred income tax liabilities for tax gross-up adjustment for ratemaking purposes due to tax reform	14.4
Income tax expense from tax reform	$ 32.2

LEASES - Narrative (Details)

LEASES - Narrative (Details)	12 Months Ended
	Dec. 31, 2021
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	1 year
Minimum | Evergy Kansas Central
Lessee, Lease, Description [Line Items]
Remaining lease term	1 year
Minimum | Evergy Metro
Lessee, Lease, Description [Line Items]
Remaining lease term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	17 years
Maximum | Evergy Kansas Central
Lessee, Lease, Description [Line Items]
Remaining lease term	17 years
Maximum | Evergy Metro
Lessee, Lease, Description [Line Items]
Remaining lease term	11 years

LEASES - Schedule of Lease Expe

LEASES - Schedule of Lease Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finance lease costs
Amortization of right-of-use assets	$ 5.1	$ 7.7	$ 5.2
Interest on lease liabilities	2.5	3.1	2.9
Operating lease costs	21.8	22.9	23.8
Short-term lease costs	5.9	2.1	4
Variable lease costs for renewable purchase power agreements	280.3	296.6	313
Total lease costs	315.6	332.4	348.9
Evergy Kansas Central
Finance lease costs
Amortization of right-of-use assets	4.5	7.2	5
Interest on lease liabilities	2.4	2.8	2.7
Operating lease costs	12.9	11.9	13.2
Short-term lease costs	1.8	0.5	1.2
Variable lease costs for renewable purchase power agreements	145.8	135.6	130.8
Total lease costs	167.4	158	152.9
Evergy Metro
Finance lease costs
Amortization of right-of-use assets	0.4	0.3	0.1
Interest on lease liabilities	0.1	0.1	0.1
Operating lease costs	9	9.3	9.2
Short-term lease costs	3	1.5	2.6
Variable lease costs for renewable purchase power agreements	101	112.2	129.2
Total lease costs	$ 113.5	$ 123.4	$ 141.2

LEASES - Supplemental Cash Flow

LEASES - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 20.7	$ 22.2	$ 21.7
Operating cash flows from finance leases	2.6	2.8	2.8
Financing cash flows from finance leases	5.3	5.6	5
Right-of-use assets obtained in exchange for new operating lease liabilities	16.4	6.9	10.4
Right-of-use assets obtained in exchange for new finance lease liabilities	1.4	5.6	8.3
Evergy Kansas Central
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	11.8	12.9	13.7
Operating cash flows from finance leases	2.4	2.5	2.6
Financing cash flows from finance leases	4.7	5.1	4.8
Right-of-use assets obtained in exchange for new operating lease liabilities	7.1	6.6	6.1
Right-of-use assets obtained in exchange for new finance lease liabilities	1.4	4	8.3
Evergy Metro
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	10.4	10.8	9.9
Operating cash flows from finance leases	0.1	0.1	0.1
Financing cash flows from finance leases	0.5	0.4	0.1
Right-of-use assets obtained in exchange for new operating lease liabilities	9.3	0.3	2.4
Right-of-use assets obtained in exchange for new finance lease liabilities	$ 0	$ 1.6	$ 0

LEASES - Schedule of Future Pay

LEASES - Schedule of Future Payments for Finance Leases (Details) $ in Millions	Dec. 31, 2021USD ($)
Lessee, Lease, Description [Line Items]
2022	$ 7.8
2023	6.7
2024	5.5
2025	4.7
2026	4.4
After 2026	38.5
Total finance lease payments	67.6
Amounts representing imputed interest	(21.3)
Present value of lease payments	$ 46.3
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	LONG-TERM LIABILITIES, OTHER
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	PROPERTY, PLANT AND EQUIPMENT, NET
Weighted-average remaining lease term (years)	13 years 3 months 18 days
Weighted-average discount rate	5.60%
Other Current Liabilities
Lessee, Lease, Description [Line Items]
Less: current portion	$ (5.4)
Other Noncurrent Liabilities
Lessee, Lease, Description [Line Items]
Total long-term obligations under finance leases	40.9
Property, plant and equipment, net
Lessee, Lease, Description [Line Items]
Right-of-use assets under finance leases included in property, plant and equipment, net on the consolidated balance sheets	310.3
Evergy Kansas Central
Lessee, Lease, Description [Line Items]
2022	7.1
2023	5.9
2024	4.7
2025	4.2
2026	3.9
After 2026	37.8
Total finance lease payments	63.6
Amounts representing imputed interest	(20.6)
Present value of lease payments	43
Less: current portion	(4.9)
Total long-term obligations under finance leases	38.1
Right-of-use assets under finance leases included in property, plant and equipment, net on the consolidated balance sheets	$ 50.6
Weighted-average remaining lease term (years)	13 years 10 months 24 days
Weighted-average discount rate	5.60%
Evergy Metro
Lessee, Lease, Description [Line Items]
2022	$ 0.6
2023	0.6
2024	0.6
2025	0.3
2026	0.2
After 2026	0.3
Total finance lease payments	2.6
Amounts representing imputed interest	(0.4)
Present value of lease payments	2.2
Less: current portion	(0.5)
Total long-term obligations under finance leases	1.7
Right-of-use assets under finance leases included in property, plant and equipment, net on the consolidated balance sheets	$ 2.2
Weighted-average remaining lease term (years)	5 years
Weighted-average discount rate	5.10%

LEASES - Schedule of Future P_2

LEASES - Schedule of Future Payments for Operating Leases (Details) $ in Millions	Dec. 31, 2021USD ($)
Lessee, Lease, Description [Line Items]
2022	$ 18.8
2023	15.3
2024	12.5
2025	8.5
2026	5.9
After 2026	30.3
Total operating lease payments	91.3
Amounts representing imputed interest	$ (7.3)
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	LONG-TERM LIABILITIES, OTHER
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	LONG-TERM ASSETS, OTHER
Weighted-average remaining lease term (years)	7 years 7 months 6 days
Weighted-average discount rate	2.20%
Other Liabilities
Lessee, Lease, Description [Line Items]
Present value of lease payments	$ 84
Other Current Liabilities
Lessee, Lease, Description [Line Items]
Less: current portion	(17.1)
Other Noncurrent Liabilities
Lessee, Lease, Description [Line Items]
Total long-term obligations under operating leases	66.9
Assets
Lessee, Lease, Description [Line Items]
Right-of-use assets under operating leases included in other assets on the consolidated balance sheets	90.7
Evergy Kansas Central
Lessee, Lease, Description [Line Items]
2022	9.4
2023	6.5
2024	4.3
2025	2.2
2026	0.7
After 2026	0.1
Total operating lease payments	23.2
Amounts representing imputed interest	(1)
Right-of-use assets under operating leases included in other assets on the consolidated balance sheets	$ 29
Weighted-average remaining lease term (years)	3 years
Weighted-average discount rate	2.40%
Evergy Kansas Central | Other Liabilities
Lessee, Lease, Description [Line Items]
Present value of lease payments	$ 22.2
Evergy Kansas Central | Other Current Liabilities
Lessee, Lease, Description [Line Items]
Less: current portion	(9)
Evergy Kansas Central | Other Noncurrent Liabilities
Lessee, Lease, Description [Line Items]
Total long-term obligations under operating leases	13.2
Evergy Metro
Lessee, Lease, Description [Line Items]
2022	9.2
2023	8.6
2024	7.9
2025	6.4
2026	5.4
After 2026	30.3
Total operating lease payments	67.8
Amounts representing imputed interest	(6.3)
Right-of-use assets under operating leases included in other assets on the consolidated balance sheets	$ 46.7
Weighted-average remaining lease term (years)	9 years 3 months 18 days
Weighted-average discount rate	2.10%
Evergy Metro | Other Liabilities
Lessee, Lease, Description [Line Items]
Present value of lease payments	$ 61.5
Evergy Metro | Other Current Liabilities
Lessee, Lease, Description [Line Items]
Less: current portion	(8)
Evergy Metro | Other Noncurrent Liabilities
Lessee, Lease, Description [Line Items]
Total long-term obligations under operating leases	$ 53.5

Schedule I Financial Statemen_2

Schedule I Financial Statements of Parent Company Statements of Income (Details) - USD ($) $ in Millions	10 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
OPERATING EXPENSES:
Operating and maintenance		$ 1,107.5	$ 1,163	$ 1,218.5
Total Operating Expenses		4,231.8	3,769.5	3,962
INCOME FROM OPERATIONS		1,354.9	1,143.9	1,185.8
OTHER INCOME (EXPENSE):
Equity in earnings from subsidiaries		8.2	8.3	9.8
Other expense		(87.4)	(78.2)	(76.9)
Total Other Expense, Net		18.8	(36.1)	(39)
Interest expense		372.6	383.9	374
INCOME BEFORE INCOME TAXES		1,001.1	723.9	772.8
Income tax benefit		(117.4)	(102.2)	(97)
Net income attributable to Evergy, Inc.		879.7	618.3	669.9
COMPREHENSIVE INCOME
NET INCOME		891.9	630	685.6
Derivative hedging activity
Loss on derivative hedging instruments	$ (69.8)	0	0	(64.4)
Income tax benefit		0	0	16.5
Net loss on derivative hedging instruments		0	0	(47.9)
Reclassification to expenses, net of tax		5.5	3	1.5
Derivative hedging activity, net of tax		5.5	3	(46.4)
Total other comprehensive income (loss)		5.4	0.6	(47)
COMPREHENSIVE INCOME		885.1	618.9	622.9
Parent
OPERATING EXPENSES:
Operating and maintenance		13.2	39.3	19.4
Total Operating Expenses		13.2	39.3	19.4
INCOME FROM OPERATIONS		(13.2)	(39.3)	(19.4)
OTHER INCOME (EXPENSE):
Equity in earnings from subsidiaries		932.9	683.4	698.2
Investment earnings		19.2	32.1	32.7
Other expense		(8.3)	(0.1)	(0.1)
Total Other Expense, Net		943.8	715.4	730.8
Interest expense		74.3	86.3	60.7
INCOME BEFORE INCOME TAXES		856.3	589.8	650.7
Income tax benefit		16.5	22.7	13.7
Net income attributable to Evergy, Inc.		872.8	612.5	664.4
Derivative hedging activity
Loss on derivative hedging instruments		0	0	(64.4)
Income tax benefit		0	0	16.5
Net loss on derivative hedging instruments		0	0	(47.9)
Reclassification to expenses, net of tax		5.5	3	1.5
Derivative hedging activity, net of tax		5.5	3	(46.4)
Other comprehensive loss from subsidiaries, net		(0.1)	(2.4)	(0.6)
Total other comprehensive income (loss)		5.4	0.6	(47)
COMPREHENSIVE INCOME		$ 878.2	$ 613.1	$ 617.4

Schedule I Financial Statemen_3

Schedule I Financial Statements of Parent Company Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
CURRENT ASSETS:
Cash and cash equivalents	$ 26.2	$ 144.9
Income taxes receivable	28	62.9
Prepaid expenses and other assets	49.3	48.2
Total Current Assets	1,710.3	1,624.3
OTHER ASSETS:
Other	563.4	527.7
TOTAL ASSETS	28,520.5	27,114.8
CURRENT LIABILITIES:
Current maturities of long-term debt	389.3	436.4
Accrued interest	118.8	123.4
Other	184.6	182.6
Total Current Liabilities	3,102.9	2,355.8
LONG-TERM LIABILITIES:
Long-term debt, net	9,297.9	9,190.9
Other	310	308.2
Total Long-Term Liabilities	16,175.9	16,040.5
Commitments and Contingencies (Note 14)
Evergy, Inc. Shareholders' Equity:
Common stock - 600,000,000 shares authorized, without par value, 229,299,900 and 226,836,670 shares issued	7,205.5	7,080
Retained earnings	2,082.9	1,702.8
Accumulated other comprehensive loss	(44)	(49.4)
Total Evergy, Inc. Shareholders' Equity	9,244.4	8,733.4
TOTAL LIABILITIES AND EQUITY	28,520.5	27,114.8
Parent
CURRENT ASSETS:
Cash and cash equivalents	7.5	11
Accounts receivable from subsidiaries	72.2	54.1
Notes receivable from subsidiaries	289.5	349.4
Income taxes receivable	14.8	7.4
Prepaid expenses and other assets	2	1.9
Total Current Assets	386	423.8
OTHER ASSETS:
Investment in subsidiaries	10,992.1	10,349.2
Note receivable from subsidiaries	0	287.5
Deferred income taxes	19	20.5
Other	1.2	0.5
Total Other Assets	11,012.3	10,657.7
TOTAL ASSETS	11,398.3	11,081.5
CURRENT LIABILITIES:
Current maturities of long-term debt	287.5	350
Notes payable and commercial paper	358	200
Accounts Payable to subsidiaries	22.3	18.4
Accrued interest	12.4	13.9
Other	8.1	11
Total Current Liabilities	688.3	593.3
LONG-TERM LIABILITIES:
Long-term debt, net	1,590.1	1,875.7
Other	14.9	11.7
Total Long-Term Liabilities	1,605	1,887.4
Commitments and Contingencies (Note 14)
Evergy, Inc. Shareholders' Equity:
Common stock - 600,000,000 shares authorized, without par value, 229,299,900 and 226,836,670 shares issued	7,188.7	7,063.2
Retained earnings	1,960.3	1,587
Accumulated other comprehensive loss	(44)	(49.4)
Total Evergy, Inc. Shareholders' Equity	9,105	8,600.8
TOTAL LIABILITIES AND EQUITY	$ 11,398.3	$ 11,081.5

Schedule I Financial Statemen_4

Schedule I Financial Statements of Parent Company Balance Sheet Parenthetical (Details) - shares	Dec. 31, 2021	Dec. 31, 2020
Condensed Balance Sheet Statements, Captions [Line Items]
Common stock - shares authorized (in shares)	600,000,000	600,000,000
Common stock - shares issued (in shares)	229,299,900	226,836,670
Parent
Condensed Balance Sheet Statements, Captions [Line Items]
Common stock - shares authorized (in shares)	600,000,000	600,000,000
Common stock - shares issued (in shares)	229,299,900	226,836,670

Schedule I Financial Statemen_5

Schedule I Financial Statements of Parent Company Statement of Cash Flows (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
CASH FLOWS FROM (USED IN) OPERATING ACTIVITIES:
Net income attributable to Evergy, Inc.		$ 879.7	$ 618.3	$ 669.9
Adjustments to reconcile income to net cash from operating activities:
Non-cash compensation		15.6	16	16.3
Net deferred income taxes and credits		102.2	126.9	121.5
Equity in earnings from subsidiaries		(8.2)	(8.3)	(9.8)
Other		(13.8)	0.8	(3.2)
Changes in working capital items:
Prepaid expenses and other current assets		(299.8)	16.9	43.4
Accrued taxes		41.4	6.7	(8.2)
Other current liabilities		(19.4)	(98.9)	(59.4)
Changes in other assets		(251.5)	119.5	79.8
Cash Flows from Operating Activities		1,351.7	1,753.8	1,749
CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES:
Cash Flows from in Investing Activities		(1,913.8)	(1,533.7)	(1,080.3)
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES:
Short-term debt, net		840.5	(246.9)	(176.7)
Proceeds from long-term debt		497.3	888.8	2,372.7
Retirements of long-term debt		(432)	(251.1)	(701.1)
Payment for settlement of interest rate swap accounted for as a cash flow hedge	$ (69.8)	0	0	(69.8)
Cash dividends paid		(497.9)	(465)	(462.5)
Issuance of common stock		112.5	0	0
Repurchase of common stock		0	0	(1,628.7)
Other financing activities		(9.3)	(13.6)	(6.7)
Cash Flows used in Financing Activities		443.4	(98.4)	(805.8)
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH		(118.7)	121.7	(137.1)
Beginning of period		144.9	23.2	160.3
End of period		26.2	144.9	23.2
Parent
CASH FLOWS FROM (USED IN) OPERATING ACTIVITIES:
Net income attributable to Evergy, Inc.		872.8	612.5	664.4
Adjustments to reconcile income to net cash from operating activities:
Non-cash compensation		15.6	16	16.3
Net deferred income taxes and credits		0	9.6	21.4
Equity in earnings from subsidiaries		(932.9)	(683.4)	(698.2)
Other		7	7	2.1
Changes in working capital items:
Accounts receivable from subsidiaries		(18.2)	(30)	8.9
Income taxes receivable		(7.5)	0.6	(7.8)
Prepaid expenses and other current assets		0	0.8	(0.1)
Accounts payable to subsidiaries		3.9	5	(15)
Accrued interest		(1.4)	(0.7)	12.5
Other current liabilities		(3.2)	2.9	1.7
Cash dividends from subsidiaries		290	355	460
Changes in other assets		0.1	0.3	0.2
Changes in other liabilities		4.8	(3.7)	(3.5)
Cash Flows from Operating Activities		231	291.9	462.9
CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES:
Repayment of intercompany note		347.4	0	0
Cash Flows from in Investing Activities		347.4	0	0
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES:
Short-term debt, net		157.1	180	20
Proceeds from long-term debt		0	0	1,585
Retirements of long-term debt		(350)	0	0
Payment for settlement of interest rate swap accounted for as a cash flow hedge		0	0	(69.8)
Cash dividends paid		(497.9)	(465)	(462.5)
Issuance of common stock		112.5	0	0
Repurchase of common stock		0	0	(1,628.7)
Other financing activities		(3.6)	(7.5)	(2.4)
Cash Flows used in Financing Activities		(581.9)	(292.5)	(558.4)
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH		(3.5)	(0.6)	(95.5)
Beginning of period		11	11.6	107.1
End of period		$ 7.5	$ 11	$ 11.6

Schedule I Financial Statemen_6

Schedule I Financial Statements of Parent Company Schedule I Financial Statements of Parent Company - Dividends (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Parent
Condensed Financial Statements, Captions [Line Items]
Cash dividends from subsidiaries	$ 290	$ 355	$ 460

Schedule II Valuation and Qua_2

Schedule II Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Allowance for uncollectible accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance At Beginning Of Period	$ 19.3	$ 10.5	$ 9.2
Additions Charged To Costs And Expenses	28	24.9	27.2
Additions Charged To Other Accounts	12	12.5	12.4
Deductions	26.4	28.6	38.3
Balance At End Of Period	32.9	19.3	10.5
Allowance for uncollectible accounts | Evergy Kansas Central
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance At Beginning Of Period	7.5	3.8	3.9
Additions Charged To Costs And Expenses	12	11.1	7.2
Additions Charged To Other Accounts	4.5	2.6	3.4
Deductions	11	10	10.7
Balance At End Of Period	13	7.5	3.8
Allowance for uncollectible accounts | Evergy Metro
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance At Beginning Of Period	8.1	4.6	3.8
Additions Charged To Costs And Expenses	10.5	9	13.7
Additions Charged To Other Accounts	5.3	6.9	6.3
Deductions	10.6	12.4	19.2
Balance At End Of Period	13.3	8.1	4.6
Tax valuation allowance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance At Beginning Of Period	14.4	17.5	27.3
Additions Charged To Costs And Expenses	0	0	0.6
Additions Charged To Other Accounts	0	0	0
Deductions	1.6	3.1	10.4
Balance At End Of Period	$ 12.8	14.4	17.5
Tax valuation allowance | Evergy Kansas Central
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance At Beginning Of Period		$ 0	1.7
Additions Charged To Costs And Expenses			0
Additions Charged To Other Accounts			0
Deductions			1.7
Balance At End Of Period			$ 0