Cover Page - shares	9 Months Ended
Cover Page - shares	Sep. 30, 2019	Nov. 01, 2019
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2019
Document Transition Report	false
Entity File Number	001-38515
Entity Registrant Name	EVERGY, INC.
Entity Tax Identification Number	82-2733395
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 Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		227,903,192
Entity Incorporation, State or Country Code	MO
Entity Central Index Key	0001711269
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Amendment Flag	false
Evergy Kansas Central Inc [Member]
Entity Information [Line Items]
Entity File Number	001-03523
Entity Registrant Name	EVERGY KANSAS CENTRAL, INC.
Entity Tax Identification Number	48-0290150
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 Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		1
Entity Incorporation, State or Country Code	KS
Entity Central Index Key	0000054507
Evergy Metro Inc [Member]
Entity Information [Line Items]
Entity File Number	000-51873
Entity Registrant Name	EVERGY METRO, INC.
Entity Tax Identification Number	44-0308720
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 Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		1
Entity Incorporation, State or Country Code	MO
Entity Central Index Key	0000054476
WESTAR ENERGY INC /KS
Entity Information [Line Items]
Entity Information, Former Legal or Registered Name	Westar Energy, Inc.
KANSAS CITY POWER & LIGHT CO
Entity Information [Line Items]
Entity Information, Former Legal or Registered Name	Kansas City Power & Light Company

Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
CURRENT ASSETS:
Cash and cash equivalents	$ 50.1			$ 160.3
Receivables, net	268.8			193.7
Accounts receivable pledged as collateral	395.0			365.0
Fuel inventory and supplies	454.4			511.0
Income taxes receivable	65.3			68.0
Regulatory assets	204.8			303.9
Prepaid expenses and other assets	73.9			79.1
Total Current Assets	1,512.3			1,681.0
PROPERTY, PLANT AND EQUIPMENT, NET	18,976.1			18,782.5
OTHER ASSETS:
Regulatory assets	1,869.7			1,757.9
Nuclear decommissioning trust fund	541.0			472.1
Goodwill	2,336.6			2,338.9
Other	508.0			396.5
Total Other Assets	5,255.3			4,965.4
TOTAL ASSETS	25,907.5			25,598.1
CURRENT LIABILITIES:
Current maturities of long-term debt	251.1			705.4
Notes payable and commercial paper	360.6			738.6
Collateralized note payable	395.0			365.0
Accounts payable	311.3			451.5
Accrued taxes	287.9			133.6
Accrued interest	110.7			110.9
Regulatory liabilities	59.6			110.2
Asset retirement obligations	58.2			49.8
Other	208.4			171.9
Total Current Liabilities	2,075.1			2,867.2
LONG-TERM LIABILITIES:
Long-term debt, net	8,749.2			6,636.3
Deferred income taxes	1,729.6			1,599.2
Unamortized investment tax credits	370.3			373.2
Regulatory liabilities	2,227.5			2,218.8
Pension and post-retirement liability	1,149.6			987.6
Asset retirement obligations	659.1			637.3
Other	338.4			236.7
Total Long-Term Liabilities	15,242.5			12,740.2
Commitments and Contingencies (Note 11)
Evergy, Inc. Shareholders' Equity:
Common stock	7,066.9			8,685.2
Retained earnings	1,603.1			1,346.0
Accumulated other comprehensive loss	(50.7)			(3.0)
Total Shareholders' Equity	8,619.3			10,028.2
Noncontrolling Interests	(29.4)			(37.5)
Total Equity	8,589.9	$ 8,854.7	$ 9,391.7	9,990.7	$ 10,648.8	$ 10,895.4	$ 3,864.4	$ 3,860.4
TOTAL LIABILITIES AND EQUITY	25,907.5			25,598.1
Variable Interest Entities
CURRENT ASSETS:
PROPERTY, PLANT AND EQUIPMENT, NET	163.8			169.2
CURRENT LIABILITIES:
Current maturities of long-term debt	32.3			30.3
LONG-TERM LIABILITIES:
Long-term debt, net	$ 18.8			$ 51.1

Consolidated Statements of Comprehensive Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
OPERATING REVENUES	$ 1,577.6	$ 1,582.5	$ 4,016.2	$ 3,076.1
OPERATING EXPENSES:
Fuel and purchased power	357.3	383.7	978.9	748.9
SPP network transmission costs	62.4	58.4	188.7	194.4
Operating and maintenance	311.6	330.4	907.1	754.2
Depreciation and amortization	216.1	193.9	645.1	411.6
Taxes other than income tax	91.5	83.0	276.4	183.5
Total Operating Expenses	1,038.9	1,049.4	2,996.2	2,292.6
INCOME FROM OPERATIONS	538.7	533.1	1,020.0	783.5
OTHER INCOME (EXPENSE):
Investment earnings	1.8	4.9	7.6	6.2
Other income	2.8	1.6	17.1	5.3
Other expense	(19.7)	(30.8)	(57.2)	(55.2)
Total Other Expense, Net	(15.1)	(24.3)	(32.5)	(43.7)
Interest expense	90.8	89.1	277.3	191.3
INCOME BEFORE INCOME TAXES	432.8	419.7	710.2	548.5
Income tax expense	65.5	64.1	99.2	28.3
Equity in earnings of equity method investees, net of income taxes	3.6	2.0	7.9	4.7
NET INCOME	370.9	357.6	618.9	524.9
Less: Net income attributable to noncontrolling interests	4.1	2.6	12.9	7.6
Net income attributable to Evergy, Inc.	$ 366.8	$ 355.0	$ 606.0	$ 517.3
BASIC AND DILUTED EARNINGS PER AVERAGE COMMON SHARE OUTSTANDING ATTRIBUTABLE TO EVERGY (see Note 1)
Earnings Per Share, Basic	$ 1.56	$ 1.32	$ 2.49	$ 2.61
Diluted earnings per common share (in dollars per share)	$ 1.56	$ 1.32	$ 2.49	$ 2.61
AVERAGE COMMON SHARES OUTSTANDING
Basic (in shares)	234.6	268.6	243.5	197.9
Diluted (in shares)	235.0	268.8	243.8	198.0
COMPREHENSIVE INCOME
Net income	$ 370.9	$ 357.6	$ 618.9	$ 524.9
Derivative hedging activity
Loss on derivative hedging instruments	(29.4)	0.0	(64.4)	0.0
Income tax benefit	7.5	0.0	16.5	0.0
Net loss on derivative hedging instruments	(21.9)	0.0	(47.9)	0.0
Reclassification to expenses, net of tax	0.2	0.0	0.2	0.0
Derivative hedging activity, net of tax	(21.7)	0.0	(47.7)	0.0
Total other comprehensive loss	(21.7)	0.0	(47.7)	0.0
COMPREHENSIVE INCOME	349.2	357.6	571.2	524.9
Less: comprehensive income attributable to noncontrolling interest	4.1	2.6	12.9	7.6
COMPREHENSIVE INCOME	$ 345.1	$ 355.0	$ 558.3	$ 517.3

Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
CASH FLOWS FROM (USED IN) OPERATING ACTIVITIES:
Net income	$ 618.9	$ 524.9
Adjustments to reconcile income to net cash from operating activities:
Depreciation and amortization	645.1	411.6
Amortization of nuclear fuel	42.6	28.6
Amortization of deferred refueling outage	19.4	14.7
Amortization of corporate-owned life insurance	16.5	17.2
Non-cash compensation	12.9	25.2
Net deferred income taxes and credits	111.4	47.8
Allowance for equity funds used during construction	(0.9)	(2.4)
Payments for asset retirement obligations	(11.6)	(15.9)
Equity in earnings of equity method investees, net of income taxes	(7.9)	(4.7)
Income from corporate-owned life insurance	(19.5)	(2.1)
Other	(3.6)	(3.9)
Changes in working capital items:
Accounts receivable	(68.4)	(34.9)
Accounts receivable pledged as collateral	(30.0)	(15.0)
Fuel inventory and supplies	57.0	44.6
Prepaid expenses and other current assets	65.7	(3.4)
Accounts payable	(111.5)	(58.5)
Accrued taxes	155.3	119.0
Other current liabilities	(77.7)	38.9
Changes in other assets	56.1	26.0
Changes in other liabilities	(22.5)	33.9
Cash Flows from Operating Activities	1,447.3	1,191.6
CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES:
Additions to property, plant and equipment	(849.1)	(698.3)
Cash acquired from the merger with Great Plains Energy	0.0	1,154.2
Purchase of securities - trusts	(37.4)	(107.0)
Sale of securities - trusts	32.3	110.2
Investment in corporate-owned life insurance	(17.2)	(16.2)
Proceeds from investment in corporate-owned life insurance	99.1	6.5
Proceeds from settlement of interest rate swap	0.0	140.6
Other investing activities	0.2	(15.2)
Cash Flows from (used in) Investing Activities	(772.1)	574.8
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES:
Short term debt, net	(378.0)	(166.7)
Proceeds from term loan facility	1,000.0	0.0
Repayment of term loan facility	(1,000.0)	0.0
Collateralized short-term borrowings, net	30.0	15.0
Proceeds from long-term debt	2,374.0	22.9
Retirements of long-term debt	(701.1)	(127.4)
Retirements of long-term debt of variable interest entities	(30.3)	(28.5)
Payment for settlement of interest rate swap accounted for as a cash flow hedge	(69.8)	0.0
Borrowings against cash surrender value of corporate-owned life insurance	57.2	55.1
Repayment of borrowings against cash surrender value of corporate-owned life insurance	(77.4)	(3.9)
Cash dividends paid	(347.5)	(350.4)
Repurchase of common stock under repurchase plan	(1,628.7)	(486.1)
Distributions to shareholders of noncontrolling interests	(8.5)	0.0
Other financing activities	(5.3)	(20.1)
Cash Flows used in Financing Activities	(785.4)	(1,090.1)
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(110.2)	676.3
CASH, CASH EQUIVALENTS AND RESTRICTED CASH:
Beginning of period	160.3	3.5
End of period	$ 50.1	$ 679.8

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, 2017		142,094,275
Beginning balance at Dec. 31, 2017	$ 3,860.4	$ 2,734.8	$ 1,173.3	$ 0.0	$ (47.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	62.9		60.5		2.4
Issuance of stock for compensation and reinvested dividends (in shares)		138,828
Issuance of stock for compensation and reinvested dividends	(3.7)	$ (3.7)
Dividends declared on common stock	(57.7)		(57.7)
Stock compensation expense	2.5	$ 2.5
Ending balance (in shares) at Mar. 31, 2018		142,233,103
Ending balance at Mar. 31, 2018	3,864.4	$ 2,733.6	1,176.1	0.0	(45.3)
Beginning balance (in shares) at Dec. 31, 2017		142,094,275
Beginning balance at Dec. 31, 2017	3,860.4	$ 2,734.8	1,173.3	0.0	(47.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	524.9
Derivative hedging activity, net of tax	0.0
Ending balance (in shares) at Sep. 30, 2018		264,797,584
Ending balance at Sep. 30, 2018	10,648.8	$ 9,236.4	1,452.5	0.0	(40.1)
Beginning balance (in shares) at Mar. 31, 2018		142,233,103
Beginning balance at Mar. 31, 2018	3,864.4	$ 2,733.6	1,176.1	0.0	(45.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	104.4		101.8		2.6
Issuance of stock to Great Plains Energy shareholders (in shares)		128,947,518
Issuance of stock to Great Plains Energy shareholders	6,979.9	$ 6,979.9
Issuance of restricted common stock (in shares)		122,505
Issuance of stock for compensation and reinvested dividends (in shares)		384,617
Issuance of stock for compensation and reinvested dividends	(13.3)	$ (13.3)
Dividends declared on common stock	(57.8)		(57.8)
Stock compensation expense	19.3	19.3
Other	(1.5)	$ (1.4)	(0.1)
Ending balance (in shares) at Jun. 30, 2018		271,687,743
Ending balance at Jun. 30, 2018	10,895.4	$ 9,718.1	1,220.0	0.0	(42.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	357.6		355.0		2.6
Issuance of stock for compensation and reinvested dividends (in shares)		4,914
Issuance of stock for compensation and reinvested dividends	0.2	$ 0.2
Dividends declared on common stock	(122.0)		(122.0)
Dividends, Paid-in-kind	(0.6)		(0.6)
Stock compensation expense	3.4	$ 3.4
Repurchase of common stock under repurchase plan (in shares)		(6,895,073)
Repurchase of common stock under repurchase plan	(486.1)	$ (486.1)
Derivative hedging activity, net of tax	0.0
Other	0.9	$ 0.8	0.1
Ending balance (in shares) at Sep. 30, 2018		264,797,584
Ending balance at Sep. 30, 2018	10,648.8	$ 9,236.4	1,452.5	0.0	(40.1)
Beginning balance (in shares) at Dec. 31, 2018		255,326,252
Beginning balance at Dec. 31, 2018	9,990.7	$ 8,685.2	1,346.0	(3.0)	(37.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	103.4		99.5		3.9
Issuance of stock for compensation and reinvested dividends (in shares)		60,594
Issuance of stock for compensation and reinvested dividends	(1.6)	$ (1.6)
Dividends declared on common stock	(119.8)		(119.8)
Stock compensation expense	5.4	$ 5.4
Repurchase of common stock under repurchase plan (in shares)		(10,548,060)
Repurchase of common stock under repurchase plan	(578.3)	$ (578.3)
Consolidation of noncontrolling interests	3.8				3.8
Distributions to shareholders of noncontrolling interests	(1.4)				(1.4)
Derivative hedging activity, net of tax	(10.2)			(10.2)
Other	(0.3)	$ (0.3)
Ending balance (in shares) at Mar. 31, 2019		244,838,786
Ending balance at Mar. 31, 2019	9,391.7	$ 8,110.4	1,325.7	(13.2)	(31.2)
Beginning balance (in shares) at Dec. 31, 2018		255,326,252
Beginning balance at Dec. 31, 2018	9,990.7	$ 8,685.2	1,346.0	(3.0)	(37.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	618.9
Derivative hedging activity, net of tax	(47.7)
Ending balance (in shares) at Sep. 30, 2019		227,901,556
Ending balance at Sep. 30, 2019	8,589.9	$ 7,066.9	1,603.1	(50.7)	(29.4)
Beginning balance (in shares) at Mar. 31, 2019		244,838,786
Beginning balance at Mar. 31, 2019	9,391.7	$ 8,110.4	1,325.7	(13.2)	(31.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	144.6		139.7		4.9
Issuance of stock for compensation and reinvested dividends (in shares)		41,982
Issuance of stock for compensation and reinvested dividends	(0.7)	$ (0.7)
Dividends declared on common stock	(115.8)		(115.8)
Dividends, Paid-in-kind	(0.5)		(0.5)
Stock compensation expense	4.0	$ 4.0
Repurchase of common stock under repurchase plan (in shares)		(9,414,920)
Repurchase of common stock under repurchase plan	(550.4)	$ (550.4)
Distributions to shareholders of noncontrolling interests	(2.1)				(2.1)
Derivative hedging activity, net of tax	(15.8)			(15.8)
Other	(0.3)	$ (0.3)
Ending balance (in shares) at Jun. 30, 2019		235,465,848
Ending balance at Jun. 30, 2019	8,854.7	$ 7,563.0	1,349.1	(29.0)	(28.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	370.9		366.8		4.1
Issuance of stock for compensation and reinvested dividends (in shares)		4,737
Issuance of stock for compensation and reinvested dividends	0.0	$ 0.0
Dividends declared on common stock	(111.9)		(111.9)
Dividends, Paid-in-kind	(0.9)		(0.9)
Stock compensation expense	3.5	$ 3.5
Repurchase of common stock under repurchase plan (in shares)		(7,569,029)
Repurchase of common stock under repurchase plan	(500.0)	$ (500.0)
Distributions to shareholders of noncontrolling interests	(5.1)				(5.1)
Derivative hedging activity, net of tax	(21.7)			(21.7)
Other	0.4	$ 0.4
Ending balance (in shares) at Sep. 30, 2019		227,901,556
Ending balance at Sep. 30, 2019	$ 8,589.9	$ 7,066.9	$ 1,603.1	$ (50.7)	$ (29.4)

Consolidated Balance Sheets - Evergy Kansas Central, Inc - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
CURRENT ASSETS:
Cash and cash equivalents	$ 50.1	$ 160.3
Receivables, net	268.8	193.7
Accounts receivable pledged as collateral	395.0	365.0
Fuel inventory and supplies	454.4	511.0
Income taxes receivable	65.3	68.0
Regulatory assets	204.8	303.9
Prepaid expenses and other assets	73.9	79.1
Total Current Assets	1,512.3	1,681.0
PROPERTY, PLANT AND EQUIPMENT, NET	18,976.1	18,782.5
OTHER ASSETS:
Regulatory assets	1,869.7	1,757.9
Nuclear decommissioning trust fund	541.0	472.1
Other	508.0	396.5
Total Other Assets	5,255.3	4,965.4
TOTAL ASSETS	25,907.5	25,598.1
CURRENT LIABILITIES:
Current maturities of long-term debt	251.1	705.4
Notes payable and commercial paper	360.6	738.6
Collateralized note payable	395.0	365.0
Accounts payable	311.3	451.5
Accrued taxes	287.9	133.6
Accrued interest	110.7	110.9
Regulatory liabilities	59.6	110.2
Asset retirement obligations	58.2	49.8
Other	208.4	171.9
Total Current Liabilities	2,075.1	2,867.2
LONG-TERM LIABILITIES:
Long-term debt, net	8,749.2	6,636.3
Deferred income taxes	1,729.6	1,599.2
Unamortized investment tax credits	370.3	373.2
Regulatory liabilities	2,227.5	2,218.8
Pension and post-retirement liability	1,149.6	987.6
Asset retirement obligations	659.1	637.3
Other	338.4	236.7
Total Long-Term Liabilities	15,242.5	12,740.2
Commitments and Contingencies (Note 11)
Evergy, Inc. Shareholders' Equity:
Common stock	7,066.9	8,685.2
Retained earnings	1,603.1	1,346.0
Total Shareholders' Equity	8,619.3	10,028.2
Noncontrolling Interests	(29.4)	(37.5)
Total Equity	8,589.9	9,990.7
TOTAL LIABILITIES AND EQUITY	25,907.5	25,598.1
Evergy Kansas Central Inc [Member]
CURRENT ASSETS:
Cash and cash equivalents	7.7	44.5
Receivables, net	140.7	84.3
Related party receivables	3.1	2.6
Accounts receivable pledged as collateral	200.0	185.0
Fuel inventory and supplies	247.7	276.8
Income taxes receivable	6.1	42.7
Regulatory assets	71.7	97.1
Prepaid expenses and other assets	29.9	35.0
Total Current Assets	706.9	768.0
PROPERTY, PLANT AND EQUIPMENT, NET	9,753.7	9,718.3
OTHER ASSETS:
Regulatory assets	696.6	700.4
Nuclear decommissioning trust fund	258.5	227.5
Other	266.7	233.4
Total Other Assets	1,221.8	1,161.3
TOTAL ASSETS	11,846.2	11,816.8
CURRENT LIABILITIES:
Current maturities of long-term debt	250.0	300.0
Notes payable and commercial paper	182.4	411.7
Collateralized note payable	200.0	185.0
Accounts payable	128.4	154.4
Related party payables	8.6	14.9
Accrued taxes	146.6	88.6
Accrued interest	60.0	74.4
Regulatory liabilities	36.7	19.5
Asset retirement obligations	17.1	17.1
Other	121.0	83.0
Total Current Liabilities	1,183.1	1,378.9
LONG-TERM LIABILITIES:
Long-term debt, net	3,435.6	3,389.8
Deferred income taxes	824.7	815.4
Unamortized investment tax credits	247.7	249.7
Regulatory liabilities	1,114.7	1,101.8
Pension and post-retirement liability	456.6	474.7
Asset retirement obligations	268.9	264.0
Other	146.5	130.7
Total Long-Term Liabilities	6,513.5	6,477.2
Commitments and Contingencies (Note 11)
Evergy, Inc. Shareholders' Equity:
Common stock	2,737.6	2,737.6
Retained earnings	1,441.4	1,260.6
Total Shareholders' Equity	4,179.0	3,998.2
Noncontrolling Interests	(29.4)	(37.5)
Total Equity	4,149.6	3,960.7
TOTAL LIABILITIES AND EQUITY	11,846.2	11,816.8
Variable Interest Entities
CURRENT ASSETS:
PROPERTY, PLANT AND EQUIPMENT, NET	163.8	169.2
CURRENT LIABILITIES:
Current maturities of long-term debt	32.3	30.3
LONG-TERM LIABILITIES:
Long-term debt, net	18.8	51.1
Variable Interest Entities \| Evergy Kansas Central Inc [Member]
CURRENT ASSETS:
PROPERTY, PLANT AND EQUIPMENT, NET	163.8	169.2
CURRENT LIABILITIES:
Current maturities of long-term debt	32.3	30.3
LONG-TERM LIABILITIES:
Long-term debt, net	$ 18.8	$ 51.1

Consolidated Statements of Income - Evergy Kansas Central, Inc - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
OPERATING REVENUES	$ 1,577.6	$ 1,582.5	$ 4,016.2	$ 3,076.1
OPERATING EXPENSES:
Fuel and purchased power	357.3	383.7	978.9	748.9
SPP network transmission costs	62.4	58.4	188.7	194.4
Operating and maintenance	311.6	330.4	907.1	754.2
Depreciation and amortization	216.1	193.9	645.1	411.6
Taxes other than income tax	91.5	83.0	276.4	183.5
Total Operating Expenses	1,038.9	1,049.4	2,996.2	2,292.6
INCOME FROM OPERATIONS	538.7	533.1	1,020.0	783.5
OTHER INCOME (EXPENSE):
Investment earnings	1.8	4.9	7.6	6.2
Other income	2.8	1.6	17.1	5.3
Other expense	(19.7)	(30.8)	(57.2)	(55.2)
Total Other Expense, Net	(15.1)	(24.3)	(32.5)	(43.7)
Interest expense	90.8	89.1	277.3	191.3
INCOME BEFORE INCOME TAXES	432.8	419.7	710.2	548.5
Income tax expense	65.5	64.1	99.2	28.3
Equity in earnings of equity method investees, net of income taxes	3.6	2.0	7.9	4.7
NET INCOME	370.9	357.6	618.9	524.9
Less: Net income attributable to noncontrolling interests	4.1	2.6	12.9	7.6
Net income attributable to Evergy, Inc.	366.8	355.0	606.0	517.3
Evergy Kansas Central Inc [Member]
OPERATING REVENUES	749.0	764.8	1,931.3	2,015.9
OPERATING EXPENSES:
Fuel and purchased power	144.9	169.7	375.3	463.2
SPP network transmission costs	62.4	58.4	188.7	194.4
Operating and maintenance	140.4	141.7	396.4	491.4
Depreciation and amortization	110.9	95.9	331.3	281.6
Taxes other than income tax	48.0	42.2	145.3	128.8
Total Operating Expenses	506.6	507.9	1,437.0	1,559.4
INCOME FROM OPERATIONS	242.4	256.9	494.3	456.5
OTHER INCOME (EXPENSE):
Investment earnings	0.6	0.0	3.0	(0.4)
Other income	2.3	1.3	13.0	4.9
Other expense	(10.8)	(15.2)	(29.9)	(36.1)
Total Other Expense, Net	(7.9)	(13.9)	(13.9)	(31.6)
Interest expense	41.7	43.9	134.1	132.1
INCOME BEFORE INCOME TAXES	192.8	199.1	346.3	292.8
Income tax expense	25.8	22.4	46.2	(22.0)
Equity in earnings of equity method investees, net of income taxes	1.2	1.3	3.6	3.7
NET INCOME	168.2	178.0	303.7	318.5
Less: Net income attributable to noncontrolling interests	4.1	2.6	12.9	7.6
Net income attributable to Evergy, Inc.	$ 164.1	$ 175.4	$ 290.8	$ 310.9

Consolidated Statements of Cash Flows - Evergy Kansas Central, Inc - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
CASH FLOWS FROM (USED IN) OPERATING ACTIVITIES:
Net income	$ 618.9	$ 524.9
Adjustments to reconcile income to net cash from operating activities:
Depreciation and amortization	645.1	411.6
Amortization of nuclear fuel	42.6	28.6
Amortization of deferred refueling outage	19.4	14.7
Amortization of corporate-owned life insurance	16.5	17.2
Non-cash compensation	12.9	25.2
Net deferred income taxes and credits	111.4	47.8
Allowance for equity funds used during construction	(0.9)	(2.4)
Payments for asset retirement obligations	(11.6)	(15.9)
Equity in earnings of equity method investees, net of income taxes	(7.9)	(4.7)
Income from corporate-owned life insurance	(19.5)	(2.1)
Other	(3.6)	(3.9)
Changes in working capital items:
Accounts receivable	(68.4)	(34.9)
Accounts receivable pledged as collateral	(30.0)	(15.0)
Fuel inventory and supplies	57.0	44.6
Prepaid expenses and other current assets	65.7	(3.4)
Accounts payable	(111.5)	(58.5)
Accrued taxes	155.3	119.0
Other current liabilities	(77.7)	38.9
Changes in other assets	56.1	26.0
Changes in other liabilities	(22.5)	33.9
Cash Flows from Operating Activities	1,447.3	1,191.6
CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES:
Additions to property, plant and equipment	(849.1)	(698.3)
Purchase of securities - trusts	(37.4)	(107.0)
Sale of securities - trusts	32.3	110.2
Investment in corporate-owned life insurance	(17.2)	(16.2)
Proceeds from investment in corporate-owned life insurance	99.1	6.5
Other investing activities	0.2	(15.2)
Cash Flows from (used in) Investing Activities	(772.1)	574.8
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES:
Short term debt, net	(378.0)	(166.7)
Proceeds from long-term debt	2,374.0	22.9
Retirements of long-term debt	(701.1)	(127.4)
Retirements of long-term debt of variable interest entities	(30.3)	(28.5)
Borrowings against cash surrender value of corporate-owned life insurance	57.2	55.1
Repayment of borrowings against cash surrender value of corporate-owned life insurance	(77.4)	(3.9)
Cash dividends paid	(347.5)	(350.4)
Distributions to shareholders of noncontrolling interests	(8.5)	0.0
Other financing activities	(5.3)	(20.1)
Cash Flows used in Financing Activities	(785.4)	(1,090.1)
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(110.2)	676.3
CASH, CASH EQUIVALENTS AND RESTRICTED CASH:
Beginning of period	160.3	3.5
End of period	50.1	679.8
Evergy Kansas Central Inc [Member]
CASH FLOWS FROM (USED IN) OPERATING ACTIVITIES:
Net income	303.7	318.5
Adjustments to reconcile income to net cash from operating activities:
Depreciation and amortization	331.3	281.6
Amortization of nuclear fuel	21.2	18.6
Amortization of deferred refueling outage	9.7	10.5
Amortization of corporate-owned life insurance	16.5	17.2
Non-cash compensation	0.0	19.9
Net deferred income taxes and credits	9.5	(34.2)
Allowance for equity funds used during construction	0.0	(2.4)
Payments for asset retirement obligations	(9.5)	(10.6)
Equity in earnings of equity method investees, net of income taxes	(3.6)	(3.7)
Income from corporate-owned life insurance	(18.8)	(2.1)
Other	(4.1)	(3.9)
Changes in working capital items:
Accounts receivable	(55.4)	(50.6)
Accounts receivable pledged as collateral	(15.0)	0.0
Fuel inventory and supplies	29.5	25.4
Prepaid expenses and other current assets	12.2	(7.0)
Accounts payable	(10.4)	36.2
Accrued taxes	92.8	74.4
Other current liabilities	(5.8)	23.2
Changes in other assets	23.8	22.9
Changes in other liabilities	(31.1)	(26.7)
Cash Flows from Operating Activities	696.5	707.2
CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES:
Additions to property, plant and equipment	(418.4)	(510.3)
Purchase of securities - trusts	(12.6)	(96.1)
Sale of securities - trusts	13.4	101.2
Investment in corporate-owned life insurance	(16.4)	(16.2)
Proceeds from investment in corporate-owned life insurance	97.4	6.5
Other investing activities	(3.2)	(8.1)
Cash Flows from (used in) Investing Activities	(339.8)	(523.0)
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES:
Short term debt, net	(229.3)	48.3
Collateralized short-term debt, net	15.0	0.0
Proceeds from long-term debt	294.7	0.0
Retirements of long-term debt	(300.0)	0.0
Retirements of long-term debt of variable interest entities	(30.3)	(28.5)
Borrowings against cash surrender value of corporate-owned life insurance	54.2	55.1
Repayment of borrowings against cash surrender value of corporate-owned life insurance	(76.3)	(3.9)
Cash dividends paid	(110.0)	(235.1)
Distributions to shareholders of noncontrolling interests	(8.5)	0.0
Other financing activities	(3.0)	(20.2)
Cash Flows used in Financing Activities	(393.5)	(184.3)
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(36.8)	(0.1)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH:
Beginning of period	44.5	3.5
End of period	$ 7.7	$ 3.4

Consolidated Statements of Changes in Equity - Evergy Kansas Central, Inc - USD ($) $ in Millions	Total	Common Stock	Retained earnings	Non-controlling interests	Evergy Kansas Central Inc [Member]	Evergy Kansas Central Inc [Member] Common Stock	Evergy Kansas Central Inc [Member] Retained earnings	Evergy Kansas Central Inc [Member] Non-controlling interests
Beginning balance (in shares) at Dec. 31, 2017		142,094,275				142,094,275
Beginning balance at Dec. 31, 2017	$ 3,860.4	$ 2,734.8	$ 1,173.3	$ (47.7)	$ 3,860.4	$ 2,734.8	$ 1,173.3	$ (47.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	62.9		60.5	2.4	62.9		60.5	2.4
Issuance of stock for compensation and reinvested dividends, net of tax withholding (in shares)		138,828				138,828
Issuance of stock for compensation and reinvested dividends, net of tax withholding	(3.7)	$ (3.7)			(3.7)	$ (3.7)
Dividends declared on common stock	(57.7)		(57.7)		(57.7)		(57.7)
Stock compensation expense	2.5	$ 2.5			2.5	$ 2.5
Ending balance (in shares) at Mar. 31, 2018		142,233,103				142,233,103
Ending balance at Mar. 31, 2018	3,864.4	$ 2,733.6	1,176.1	(45.3)	3,864.4	$ 2,733.6	1,176.1	(45.3)
Beginning balance (in shares) at Dec. 31, 2017		142,094,275				142,094,275
Beginning balance at Dec. 31, 2017	3,860.4	$ 2,734.8	1,173.3	(47.7)	3,860.4	$ 2,734.8	1,173.3	(47.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	524.9				318.5
Ending balance (in shares) at Sep. 30, 2018		264,797,584				1
Ending balance at Sep. 30, 2018	10,648.8	$ 9,236.4	1,452.5	(40.1)	4,000.2	$ 2,737.6	1,302.7	(40.1)
Beginning balance (in shares) at Mar. 31, 2018		142,233,103				142,233,103
Beginning balance at Mar. 31, 2018	3,864.4	$ 2,733.6	1,176.1	(45.3)	3,864.4	$ 2,733.6	1,176.1	(45.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	104.4		101.8	2.6	77.6		75.0	2.6
Issuance of stock for compensation and reinvested dividends, net of tax withholding (in shares)		384,617				378,162
Issuance of stock for compensation and reinvested dividends, net of tax withholding	(13.3)	$ (13.3)			(13.5)	$ (13.5)
Stock cancelled pursuant to Amended Merger Agreement						(142,611,264)
Dividends declared on common stock	(57.8)		(57.8)		(57.8)		(57.8)
Stock compensation expense	19.3	19.3			17.4	$ 17.4
Other	(1.5)	$ (1.4)	(0.1)		0.1	$ 0.1
Ending balance (in shares) at Jun. 30, 2018		271,687,743				1
Ending balance at Jun. 30, 2018	10,895.4	$ 9,718.1	1,220.0	(42.7)	3,888.2	$ 2,737.6	1,193.3	(42.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	357.6		355.0	2.6	178.0		175.4	2.6
Issuance of stock for compensation and reinvested dividends, net of tax withholding (in shares)		4,914
Issuance of stock for compensation and reinvested dividends, net of tax withholding	0.2	$ 0.2
Dividends declared on common stock	(122.0)		(122.0)		(66.0)		(66.0)
Stock compensation expense	3.4	3.4
Other	0.9	$ 0.8	0.1
Ending balance (in shares) at Sep. 30, 2018		264,797,584				1
Ending balance at Sep. 30, 2018	10,648.8	$ 9,236.4	1,452.5	(40.1)	4,000.2	$ 2,737.6	1,302.7	(40.1)
Beginning balance (in shares) at Dec. 31, 2018		255,326,252				1
Beginning balance at Dec. 31, 2018	9,990.7	$ 8,685.2	1,346.0	(37.5)	3,960.7	$ 2,737.6	1,260.6	(37.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	103.4		99.5	3.9	68.3		64.4	3.9
Issuance of stock for compensation and reinvested dividends, net of tax withholding (in shares)		60,594
Issuance of stock for compensation and reinvested dividends, net of tax withholding	(1.6)	$ (1.6)
Dividends declared on common stock	(119.8)		(119.8)		(110.0)		(110.0)
Stock compensation expense	5.4	5.4
Other	(0.3)	$ (0.3)
Consolidation of noncontrolling interests	3.8			3.8	3.8			3.8
Distributions to shareholders of noncontrolling interests	(1.4)			(1.4)	(1.4)			(1.4)
Ending balance (in shares) at Mar. 31, 2019		244,838,786				1
Ending balance at Mar. 31, 2019	9,391.7	$ 8,110.4	1,325.7	(31.2)	3,921.4	$ 2,737.6	1,215.0	(31.2)
Beginning balance (in shares) at Dec. 31, 2018		255,326,252				1
Beginning balance at Dec. 31, 2018	9,990.7	$ 8,685.2	1,346.0	(37.5)	3,960.7	$ 2,737.6	1,260.6	(37.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	618.9				303.7
Ending balance (in shares) at Sep. 30, 2019		227,901,556				1
Ending balance at Sep. 30, 2019	8,589.9	$ 7,066.9	1,603.1	(29.4)	4,149.6	$ 2,737.6	1,441.4	(29.4)
Beginning balance (in shares) at Mar. 31, 2019		244,838,786				1
Beginning balance at Mar. 31, 2019	9,391.7	$ 8,110.4	1,325.7	(31.2)	3,921.4	$ 2,737.6	1,215.0	(31.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	144.6		139.7	4.9	67.2		62.3	4.9
Issuance of stock for compensation and reinvested dividends, net of tax withholding (in shares)		41,982
Issuance of stock for compensation and reinvested dividends, net of tax withholding	(0.7)	$ (0.7)
Dividends declared on common stock	(115.8)		(115.8)
Stock compensation expense	4.0	4.0
Other	(0.3)	$ (0.3)
Distributions to shareholders of noncontrolling interests	(2.1)			(2.1)	(2.1)			(2.1)
Ending balance (in shares) at Jun. 30, 2019		235,465,848				1
Ending balance at Jun. 30, 2019	8,854.7	$ 7,563.0	1,349.1	(28.4)	3,986.5	$ 2,737.6	1,277.3	(28.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	370.9		366.8	4.1	168.2		164.1	4.1
Issuance of stock for compensation and reinvested dividends, net of tax withholding (in shares)		4,737
Issuance of stock for compensation and reinvested dividends, net of tax withholding	0.0	$ 0.0
Dividends declared on common stock	(111.9)		(111.9)
Stock compensation expense	3.5	3.5
Other	0.4	$ 0.4
Distributions to shareholders of noncontrolling interests	(5.1)			(5.1)	(5.1)			(5.1)
Ending balance (in shares) at Sep. 30, 2019		227,901,556				1
Ending balance at Sep. 30, 2019	$ 8,589.9	$ 7,066.9	$ 1,603.1	$ (29.4)	$ 4,149.6	$ 2,737.6	$ 1,441.4	$ (29.4)

Consolidated Balance Sheets - Evergy Metro, Inc - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
CURRENT ASSETS:
Cash and cash equivalents	$ 50.1	$ 160.3
Receivables, net	268.8	193.7
Accounts receivable pledged as collateral	395.0	365.0
Fuel inventory and supplies	454.4	511.0
Income taxes receivable	65.3	68.0
Regulatory assets	204.8	303.9
Total Current Assets	1,512.3	1,681.0
PROPERTY, PLANT AND EQUIPMENT, NET	18,976.1	18,782.5
OTHER ASSETS:
Regulatory assets	1,869.7	1,757.9
Nuclear decommissioning trust fund	541.0	472.1
Other	508.0	396.5
Total Other Assets	5,255.3	4,965.4
TOTAL ASSETS	25,907.5	25,598.1
CURRENT LIABILITIES:
Current maturities of long-term debt	251.1	705.4
Notes payable and commercial paper	360.6	738.6
Collateralized note payable	395.0	365.0
Accounts payable	311.3	451.5
Accrued taxes	287.9	133.6
Accrued interest	110.7	110.9
Regulatory liabilities	59.6	110.2
Asset retirement obligations	58.2	49.8
Other	208.4	171.9
Total Current Liabilities	2,075.1	2,867.2
LONG-TERM LIABILITIES:
Long-term debt, net	8,749.2	6,636.3
Deferred income taxes	1,729.6	1,599.2
Unamortized investment tax credits	370.3	373.2
Regulatory liabilities	2,227.5	2,218.8
Pension and post-retirement liability	1,149.6	987.6
Asset retirement obligations	659.1	637.3
Other	338.4	236.7
Total Long-Term Liabilities	15,242.5	12,740.2
Commitments and Contingencies (Note 11)
EQUITY:
Common stock	7,066.9	8,685.2
Retained earnings	1,603.1	1,346.0
Accumulated other comprehensive loss	(50.7)	(3.0)
Total Shareholders' Equity	8,619.3	10,028.2
TOTAL LIABILITIES AND EQUITY	25,907.5	25,598.1
Evergy Metro Inc [Member]
CURRENT ASSETS:
Cash and cash equivalents	3.4	2.6
Receivables, net	84.2	62.7
Related party receivables	90.9	101.8
Accounts receivable pledged as collateral	130.0	130.0
Fuel inventory and supplies	157.2	177.6
Regulatory assets	79.3	130.9
Prepaid expenses	21.7	20.1
Other assets	15.9	16.8
Total Current Assets	582.6	642.5
PROPERTY, PLANT AND EQUIPMENT, NET	6,775.6	6,688.1
OTHER ASSETS:
Regulatory assets	628.6	495.2
Nuclear decommissioning trust fund	282.5	244.6
Other	138.9	50.1
Total Other Assets	1,050.0	789.9
TOTAL ASSETS	8,408.2	8,120.5
CURRENT LIABILITIES:
Current maturities of long-term debt	0.0	400.0
Notes payable and commercial paper	74.9	176.9
Collateralized note payable	130.0	130.0
Accounts payable	138.6	211.1
Related party payables	0.6	0.0
Accrued taxes	110.0	39.7
Accrued interest	33.9	28.9
Regulatory liabilities	13.0	52.8
Asset retirement obligations	31.8	29.2
Accrued compensation benefits	43.2	52.5
Other	32.3	17.2
Total Current Liabilities	608.3	1,138.3
LONG-TERM LIABILITIES:
Long-term debt, net	2,524.6	2,130.1
Deferred income taxes	665.0	631.8
Unamortized investment tax credits	119.9	120.7
Regulatory liabilities	789.1	794.3
Pension and post-retirement liability	673.1	491.9
Asset retirement obligations	252.5	231.8
Other	182.8	81.8
Total Long-Term Liabilities	5,207.0	4,482.4
Commitments and Contingencies (Note 11)
EQUITY:
Common stock	1,563.1	1,563.1
Retained earnings	1,024.9	932.6
Accumulated other comprehensive loss	4.9	4.1
Total Shareholders' Equity	2,592.9	2,499.8
TOTAL LIABILITIES AND EQUITY	$ 8,408.2	$ 8,120.5

Consolidated Statements of Comprehensive Income - Evergy Metro, Inc - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
OPERATING REVENUES	$ 1,577.6	$ 1,582.5	$ 4,016.2	$ 3,076.1
OPERATING EXPENSES:
Fuel and purchased power	357.3	383.7	978.9	748.9
Operating and maintenance	311.6	330.4	907.1	754.2
Depreciation and amortization	216.1	193.9	645.1	411.6
Taxes other than income tax	91.5	83.0	276.4	183.5
Total Operating Expenses	1,038.9	1,049.4	2,996.2	2,292.6
INCOME FROM OPERATIONS	538.7	533.1	1,020.0	783.5
OTHER INCOME (EXPENSE):
Investment earnings	1.8	4.9	7.6	6.2
Other income	2.8	1.6	17.1	5.3
Other expense	(19.7)	(30.8)	(57.2)	(55.2)
Total Other Expense, Net	(15.1)	(24.3)	(32.5)	(43.7)
Interest expense	90.8	89.1	277.3	191.3
INCOME BEFORE INCOME TAXES	432.8	419.7	710.2	548.5
Income tax expense	65.5	64.1	99.2	28.3
Net income attributable to Evergy, Inc.	366.8	355.0	606.0	517.3
Derivative hedging activity
Reclassification to expenses, net of tax	0.2	0.0	0.2	0.0
Derivative hedging activity, net of tax	(21.7)	0.0	(47.7)	0.0
Total other comprehensive loss	(21.7)	0.0	(47.7)	0.0
COMPREHENSIVE INCOME	345.1	355.0	558.3	517.3
Evergy Metro Inc [Member]
OPERATING REVENUES	568.8	559.6	1,431.2	1,408.9
OPERATING EXPENSES:
Fuel and purchased power	129.3	142.4	380.4	392.4
Operating and maintenance	111.2	127.3	341.2	354.5
Depreciation and amortization	80.2	71.9	239.0	209.0
Taxes other than income tax	32.6	28.6	96.3	87.9
Total Operating Expenses	353.3	370.2	1,056.9	1,043.8
INCOME FROM OPERATIONS	215.5	189.4	374.3	365.1
OTHER INCOME (EXPENSE):
Investment earnings	0.5	0.7	1.9	2.1
Other income	1.2	0.2	2.3	1.7
Other expense	(4.9)	(9.0)	(15.7)	(22.9)
Total Other Expense, Net	(3.2)	(8.1)	(11.5)	(19.1)
Interest expense	28.2	33.0	91.6	100.6
INCOME BEFORE INCOME TAXES	184.1	148.3	271.2	245.4
Income tax expense	32.2	28.0	43.9	80.3
Net income attributable to Evergy, Inc.	151.9	120.3	227.3	165.1
Derivative hedging activity
Reclassification to expenses, net of tax	(0.1)	0.8	0.7	2.7
Derivative hedging activity, net of tax	(0.1)	0.8	0.7	2.7
Total other comprehensive loss	(0.1)	0.8	0.7	2.7
COMPREHENSIVE INCOME	$ 151.8	$ 121.1	$ 228.0	$ 167.8

Consolidated Statements of Cash Flows - Evergy Metro, Inc - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
CASH FLOWS FROM (USED IN) OPERATING ACTIVITIES:
Net income	$ 618.9	$ 524.9
Adjustments to reconcile income to net cash from operating activities:
Depreciation and amortization	645.1	411.6
Amortization of nuclear fuel	42.6	28.6
Amortization of deferred refueling outage	19.4	14.7
Net deferred income taxes and credits	111.4	47.8
Allowance for equity funds used during construction	(0.9)	(2.4)
Payments for asset retirement obligations	(11.6)	(15.9)
Other	(3.6)	(3.9)
Changes in working capital items:
Accounts receivable	(68.4)	(34.9)
Accounts receivable pledged as collateral	(30.0)	(15.0)
Fuel inventory and supplies	57.0	44.6
Prepaid expenses and other current assets	65.7	(3.4)
Accounts payable	(111.5)	(58.5)
Accrued taxes	155.3	119.0
Other current liabilities	(77.7)	38.9
Changes in other assets	56.1	26.0
Changes in other liabilities	(22.5)	33.9
Cash Flows from Operating Activities	1,447.3	1,191.6
CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES:
Additions to property, plant and equipment	(849.1)	(698.3)
Purchase of securities - trusts	(37.4)	(107.0)
Sale of securities - trusts	32.3	110.2
Other investing activities	0.2	(15.2)
Cash Flows from (used in) Investing Activities	(772.1)	574.8
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES:
Short term debt, net	(378.0)	(166.7)
Proceeds from long-term debt	2,374.0	22.9
Retirements of long-term debt	(701.1)	(127.4)
Cash dividends paid	(347.5)	(350.4)
Other financing activities	(5.3)	(20.1)
Cash Flows used in Financing Activities	(785.4)	(1,090.1)
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(110.2)	676.3
CASH, CASH EQUIVALENTS AND RESTRICTED CASH:
Beginning of period	160.3	3.5
End of period	50.1	679.8
Evergy Metro Inc [Member]
CASH FLOWS FROM (USED IN) OPERATING ACTIVITIES:
Net income	227.3	165.1
Adjustments to reconcile income to net cash from operating activities:
Depreciation and amortization	239.0	209.0
Amortization of nuclear fuel	21.4	18.7
Amortization of deferred refueling outage	9.7	10.3
Net deferred income taxes and credits	2.5	25.2
Allowance for equity funds used during construction	(0.9)	(1.2)
Payments for asset retirement obligations	(1.7)	(9.9)
Other	0.4	2.7
Changes in working capital items:
Accounts receivable	(4.1)	(41.0)
Fuel inventory and supplies	20.4	13.2
Prepaid expenses and other current assets	36.2	(3.6)
Accounts payable	(66.3)	(97.7)
Accrued taxes	70.3	97.9
Other current liabilities	(49.0)	8.5
Changes in other assets	32.7	28.3
Changes in other liabilities	18.6	79.0
Cash Flows from Operating Activities	556.5	504.5
CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES:
Additions to property, plant and equipment	(313.0)	(310.6)
Purchase of securities - trusts	(24.8)	(27.9)
Sale of securities - trusts	18.9	22.5
Other investing activities	5.1	3.4
Cash Flows from (used in) Investing Activities	(313.8)	(312.6)
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES:
Short term debt, net	(102.0)	40.3
Proceeds from long-term debt	393.2	319.5
Retirements of long-term debt	(400.0)	(373.4)
Cash dividends paid	(135.0)	(180.0)
Other financing activities	1.9	2.9
Cash Flows used in Financing Activities	(241.9)	(190.7)
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	0.8	1.2
CASH, CASH EQUIVALENTS AND RESTRICTED CASH:
Beginning of period	2.6	2.2
End of period	$ 3.4	$ 3.4

Consolidated Statements of Changes in Equity - Evergy Metro, Inc - USD ($) $ in Millions	Total	Common Stock	Retained earnings	AOCI - Net gains (losses) on cash flow hedges	Evergy Metro Inc [Member]	Evergy Metro Inc [Member] Common Stock	Evergy Metro Inc [Member] Retained earnings	Evergy Metro Inc [Member] AOCI - Net gains (losses) on cash flow hedges
Beginning balance (in shares) at Dec. 31, 2017		142,094,275				1
Beginning balance at Dec. 31, 2017	$ 3,860.4	$ 2,734.8	$ 1,173.3	$ 0.0	$ 2,513.2	$ 1,563.1	$ 949.7	$ 0.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	62.9		60.5		20.2		20.2
Dividends declared on common stock	(57.7)		(57.7)		(60.0)		(60.0)
Derivative hedging activity, net of tax					0.9			0.9
Ending balance (in shares) at Mar. 31, 2018		142,233,103				1
Ending balance at Mar. 31, 2018	3,864.4	$ 2,733.6	1,176.1	0.0	2,474.3	$ 1,563.1	909.9	1.3
Beginning balance (in shares) at Dec. 31, 2017		142,094,275				1
Beginning balance at Dec. 31, 2017	3,860.4	$ 2,734.8	1,173.3	0.0	2,513.2	$ 1,563.1	949.7	0.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	524.9				165.1
Derivative hedging activity, net of tax	0.0				2.7
Ending balance (in shares) at Sep. 30, 2018		264,797,584				1
Ending balance at Sep. 30, 2018	10,648.8	$ 9,236.4	1,452.5	0.0	2,501.0	$ 1,563.1	934.8	3.1
Beginning balance (in shares) at Mar. 31, 2018		142,233,103				1
Beginning balance at Mar. 31, 2018	3,864.4	$ 2,733.6	1,176.1	0.0	2,474.3	$ 1,563.1	909.9	1.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	104.4		101.8		24.6		24.6
Dividends declared on common stock	(57.8)		(57.8)		(60.0)		(60.0)
Derivative hedging activity, net of tax					1.0			1.0
Ending balance (in shares) at Jun. 30, 2018		271,687,743				1
Ending balance at Jun. 30, 2018	10,895.4	$ 9,718.1	1,220.0	0.0	2,439.9	$ 1,563.1	874.5	2.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	357.6		355.0		120.3		120.3
Dividends declared on common stock	(122.0)		(122.0)		(60.0)		(60.0)
Derivative hedging activity, net of tax	0.0				0.8			0.8
Ending balance (in shares) at Sep. 30, 2018		264,797,584				1
Ending balance at Sep. 30, 2018	10,648.8	$ 9,236.4	1,452.5	0.0	2,501.0	$ 1,563.1	934.8	3.1
Beginning balance (in shares) at Dec. 31, 2018		255,326,252				1
Beginning balance at Dec. 31, 2018	9,990.7	$ 8,685.2	1,346.0	(3.0)	2,499.8	$ 1,563.1	932.6	4.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	103.4		99.5		16.0		16.0
Dividends declared on common stock	(119.8)		(119.8)
Derivative hedging activity, net of tax	(10.2)			(10.2)	0.9			0.9
Ending balance (in shares) at Mar. 31, 2019		244,838,786				1
Ending balance at Mar. 31, 2019	9,391.7	$ 8,110.4	1,325.7	(13.2)	2,516.7	$ 1,563.1	948.6	5.0
Beginning balance (in shares) at Dec. 31, 2018		255,326,252				1
Beginning balance at Dec. 31, 2018	9,990.7	$ 8,685.2	1,346.0	(3.0)	2,499.8	$ 1,563.1	932.6	4.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	618.9				227.3
Derivative hedging activity, net of tax	(47.7)				0.7
Ending balance (in shares) at Sep. 30, 2019		227,901,556				1
Ending balance at Sep. 30, 2019	8,589.9	$ 7,066.9	1,603.1	(50.7)	2,592.9	$ 1,563.1	1,024.9	4.9
Beginning balance (in shares) at Mar. 31, 2019		244,838,786				1
Beginning balance at Mar. 31, 2019	9,391.7	$ 8,110.4	1,325.7	(13.2)	2,516.7	$ 1,563.1	948.6	5.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	144.6		139.7		59.4		59.4
Dividends declared on common stock	(115.8)		(115.8)		(65.0)		(65.0)
Derivative hedging activity, net of tax	(15.8)			(15.8)	(0.1)			(0.1)
Ending balance (in shares) at Jun. 30, 2019		235,465,848				1
Ending balance at Jun. 30, 2019	8,854.7	$ 7,563.0	1,349.1	(29.0)	2,511.0	$ 1,563.1	943.0	4.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	370.9		366.8		151.9		151.9
Dividends declared on common stock	(111.9)		(111.9)		(70.0)		(70.0)
Derivative hedging activity, net of tax	(21.7)			(21.7)	(0.1)
Ending balance (in shares) at Sep. 30, 2019		227,901,556				1
Ending balance at Sep. 30, 2019	$ 8,589.9	$ 7,066.9	$ 1,603.1	$ (50.7)	$ 2,592.9	$ 1,563.1	$ 1,024.9	$ 4.9

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

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+ Details

ORGANIZATION AND BASIS OF PRESENTATION

9 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

ORGANIZATION AND BASIS OF PRESENTATION

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. In September 2019, these wholly-owned direct subsidiaries were rebranded and renamed under the Evergy brand name.


•	Evergy Kansas Central Inc. (Evergy Kansas Central), formerly known as Westar Energy, Inc., 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), formerly known as Kansas Gas and Electric Company.


•	Evergy Metro, Inc. (Evergy Metro), formerly known as Kansas City Power & Light Company, 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), formerly known as KCP&L Greater Missouri Operations Company, is an integrated, regulated electric utility that provides electricity to customers in the state of Missouri.

•

Evergy Transmission Company, LLC (Evergy Transmission Company), formerly known as GPE Transmission Holding Company, LLC, 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 affiliates 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.

Since the rebranding in September 2019, Evergy Kansas Central, Evergy Kansas South, Evergy Metro and Evergy Missouri West have been conducting business in their respective service territories using the name Evergy. Collectively, the Evergy Companies have approximately 14,700 MWs of owned generating capacity and renewable purchased power 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.

Evergy was incorporated in 2017 as Monarch Energy Holding, Inc. (Monarch Energy), a wholly-owned subsidiary of Great Plains Energy Incorporated (Great Plains Energy). Prior to the closing of the merger transactions, Monarch Energy changed its name to Evergy and did not conduct any business activities other than those required for its formation and matters contemplated by the Amended and Restated Agreement and Plan of Merger, dated as of July 9, 2017, by and among Great Plains Energy, Evergy Kansas Central, Monarch Energy and King Energy, Inc. (King Energy), a wholly-owned subsidiary of Monarch Energy (Amended Merger Agreement). On June 4, 2018, in accordance with the Amended Merger Agreement, Great Plains Energy merged into Evergy, with Evergy surviving the merger and King Energy merged into Evergy Kansas Central, with Evergy Kansas Central surviving the merger. These merger transactions resulted in Evergy becoming the parent entity of Evergy Kansas Central and the direct subsidiaries of Great Plains Energy, including Evergy Metro and Evergy Missouri West. As a result of the closing of the merger transactions, each outstanding share of Great Plains Energy common stock was converted into 0.5981 shares of Evergy common stock, resulting in the issuance of 128.9 million shares. Additionally, each outstanding share of Evergy Kansas Central common stock was converted into 1 share of Evergy common stock.

Basis of Presentation

These unaudited consolidated financial statements have been prepared in accordance with generally accepted accounting principles (GAAP) for interim financial information and with the instructions to Form 10-Q and Regulation S-X. Accordingly, these unaudited consolidated financial statements do not include all of the information and notes required by GAAP for annual financial statements and should be read in conjunction with the consolidated financial statements in the Evergy Companies' combined 2018 Form 10-K.

These unaudited consolidated financial statements, in the opinion of management, reflect all normal recurring adjustments necessary to fairly present the unaudited consolidated financial statements for each of the Evergy Companies for these interim periods. In preparing financial statements that conform to GAAP, management must make estimates and assumptions that affect the reported amounts of assets and liabilities, the reported amounts of revenues and expenses, and the disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates.

Principles of Consolidation

Evergy Kansas Central was determined to be the accounting acquirer in the merger and thus, the predecessor of Evergy. Evergy had separate operations for the period beginning with the quarter ended June 30, 2018, and references to amounts for periods after the closing of the merger relate to Evergy. The results of Great Plains Energy's direct subsidiaries have been included in Evergy's results of operations from June 4, 2018, the date of the closing of the merger, and thereafter.

Each of Evergy's, Evergy Kansas Central's and Evergy Metro's unaudited 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).

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.



	September 30			December 31
		2019			2018
Evergy		(millions)
Fuel inventory		$	118.5		$	168.9
Supplies		335.9			342.1
Fuel inventory and supplies		$	454.4		$	511.0
Evergy Kansas Central
Fuel inventory		$	64.8		$	87.8
Supplies		182.9			189.0
Fuel inventory and supplies		$	247.7		$	276.8
Evergy Metro
Fuel inventory		$	37.1		$	57.8
Supplies		120.1			119.8
Fuel inventory and supplies		$	157.2		$	177.6

Property, Plant and Equipment

The following tables summarize the property, plant and equipment of Evergy, Evergy Kansas Central and Evergy Metro.



September 30, 2019	Evergy			Evergy Kansas Central			Evergy Metro
	(millions)
Electric plant in service	$	27,492.5		$	13,414.4		$	10,673.6
Electric plant acquisition adjustment	740.6			740.6			—
Accumulated depreciation	(10,136.6		)	(4,872.5		)	(4,208.5		)
Plant in service, net	18,096.5			9,282.5			6,465.1
Construction work in progress	747.2			404.9			244.4
Nuclear fuel, net	131.4			65.3			66.1
Plant to be retired, net^(a)	1.0			1.0			—
Property, plant and equipment, net	$	18,976.1		$	9,753.7		$	6,775.6

December 31, 2018	Evergy			Evergy Kansas Central			Evergy Metro
	(millions)
Electric plant in service	$	26,916.7		$	13,176.7		$	10,439.1
Electric plant acquisition adjustment	740.6			740.6			—
Accumulated depreciation	(9,694.1		)	(4,642.8		)	(4,022.4		)
Plant in service, net	17,963.2			9,274.5			6,416.7
Construction work in progress	685.2			376.7			204.4
Nuclear fuel, net	133.1			66.1			67.0
Plant to be retired, net^(a)	1.0			1.0			—
Property, plant and equipment, net	$	18,782.5		$	9,718.3		$	6,688.1

^(a) As of September 30, 2019, and December 31, 2018, represents the planned retirement of Evergy Kansas Central analog meters prior to the end of their remaining useful lives.

Other Income (Expense), Net

The table below shows the detail of other expense for each of the Evergy Companies.



	Three Months Ended September 30						Year to Date September 30
	2019			2018			2019			2018
Evergy	(millions)
Non-service cost component of net benefit cost	$	(13.7	)	$	(17.6	)	$	(40.9	)	$	(32.8	)
Other	(6.0		)	(13.2		)	(16.3		)	(22.4		)
Other expense	$	(19.7	)	$	(30.8	)	$	(57.2	)	$	(55.2	)
Evergy Kansas Central
Non-service cost component of net benefit cost	$	(4.9	)	$	(7.2	)	$	(14.5	)	$	(19.0	)
Other	(5.9		)	(8.0		)	(15.4		)	(17.1		)
Other expense	$	(10.8	)	$	(15.2	)	$	(29.9	)	$	(36.1	)
Evergy Metro^(a)
Non-service cost component of net benefit cost	$	(5.0	)	$	(6.7	)	$	(15.3	)	$	(19.7	)
Other	0.1			(2.3		)	(0.4		)	(3.2		)
Other expense	$	(4.9	)	$	(9.0	)	$	(15.7	)	$	(22.9	)

^(a)Evergy Metro amounts are included in consolidated Evergy from June 4, 2018, the date of the closing of the merger, and thereafter.

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), performance shares and restricted stock. Evergy computes the dilutive effects of potential issuances of common shares using the treasury stock method.

The following table reconciles Evergy's basic and diluted EPS.



	Three Months Ended September 30				Year to Date September 30
	2019		2018		2019		2018
Income	(millions, except per share amounts)
Net income	$	370.9	$	357.6	$	618.9	$	524.9
Less: net income attributable to noncontrolling interests	4.1		2.6		12.9		7.6
Net income attributable to Evergy, Inc.	$	366.8	$	355.0	$	606.0	$	517.3
Common Shares Outstanding
Weighted average number of common shares outstanding - basic	234.6		268.6		243.5		197.9
Add: effect of dilutive securities	0.4		0.2		0.3		0.1
Weighted average number of common shares outstanding - dilutive	235.0		268.8		243.8		198.0
Basic and Diluted EPS	$	1.56	$	1.32	$	2.49	$	2.61

There were no anti-dilutive securities for the three months ended and year to date September 30, 2019 and 2018.

Dividends Declared

In November 2019, Evergy's Board of Directors (Evergy Board) declared a quarterly dividend of $0.505 per share on Evergy's common stock. The common dividend is payable December 20, 2019, to shareholders of record as of November 27, 2019.

In November 2019, Evergy Metro's Board of Directors declared a cash dividend payable to Evergy of up to $40.0 million, payable no later than December 19, 2019.

Supplemental Cash Flow Information



Year to Date September 30	2019			2018
Evergy	(millions)
Cash paid for (received from):
Interest, net of amounts capitalized	$	240.8		$	148.7
Interest of VIEs	1.6			2.3
Income taxes, net of refunds	(13.1		)	0.6
Non-cash investing transactions:
Property, plant and equipment additions (reductions)	99.4			(24.8		)
Non-cash financing transactions:
Issuance of stock for compensation and reinvested dividends	(0.3		)	0.4
Evergy Kansas Central
Cash paid for (received from):
Interest, net of amounts capitalized	$	109.4		$	110.5
Interest of VIEs	1.6			2.3
Income taxes, net of refunds	1.8			—
Non-cash investing transactions:
Property, plant and equipment additions (reductions)	35.3			(42.0		)
Evergy Metro^(a)
Cash paid for (received from):
Interest, net of amounts capitalized	$	83.5		$	87.6
Income taxes, net of refunds	32.8			28.4
Non-cash investing transactions:
Property, plant and equipment additions	60.8			15.2

^(a)Evergy Metro amounts are included in consolidated Evergy from June 4, 2018, the date of the closing of the merger, and thereafter.

See Note 15 for supplemental cash flow information regarding the Evergy Companies' leases.

New Accounting Standards

Intangibles - Internal-Use Software

In August 2018, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2018-15, Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract, which aligns the requirements for recording implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. An entity in a hosting arrangement that is a service contract will need to determine to which project stage (that is, preliminary project stage, application development stage or post-implementation stage) an implementation activity relates. Costs for implementation activities in the application development stage are recorded as a prepaid asset depending on the nature of the costs, while costs incurred during the preliminary project and post-implementation stages are expensed as the activities occur. Costs that are recorded to a prepaid asset are to be expensed over the term of the hosting arrangement. The new guidance is effective for annual periods beginning after December 15, 2019, and interim periods within those fiscal years. The new guidance can be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. Early adoption is permitted. The Evergy Companies early adopted ASU No. 2018-15 prospectively as of January 1, 2019. The adoption of ASU No. 2018-15 did not have a material impact on the Evergy Companies.

Leases

In February 2016, the FASB issued ASU No. 2016-02, Leases, which requires an entity that is a lessee to record a right-of-use asset and a lease liability for lease payments on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of

expense recognition in the income statement. Lessor accounting remains largely unchanged. In January 2018, the FASB issued ASU No. 2018-01, Leases: Land Easement Practical Expedient for Transition to Topic 842, which permits entities to elect an optional transition practical expedient to not evaluate, under Topic 842, land easements that exist or expired before the entity's adoption of Topic 842 and that were not previously accounted for as leases under Topic 840. In July 2018, the FASB issued ASU No. 2018-10, Codification Improvements to Topic 842, Leases, which updates narrow aspects of the guidance issued in ASU No. 2016-02. Also in July 2018, the FASB issued ASU No. 2018-11, Leases: Targeted Improvements, which provides an optional transition method that allows entities to initially apply Topic 842 at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption without restating prior periods. In December 2018, the FASB issued ASU No. 2018-20, Leases: Narrow-Scope Improvements for Lessors, which is expected to reduce a lessor's implementation and ongoing costs associated with applying ASU No. 2016-02. In March 2019, the FASB issued ASU No. 2019-01, Leases: Codification Improvements, which clarifies certain lessor accounting and interim reporting requirements. ASU No. 2016-02 and the subsequent amendments are effective for interim and annual periods beginning after December 15, 2018, with early adoption permitted, and requires a modified retrospective transition approach with an option to either adjust or not adjust comparative periods.

The Evergy Companies adopted the new guidance on January 1, 2019, without adjusting comparative periods for all leases existing as of January 1, 2019, by electing the optional transition method permitted by ASU No. 2018-11. As a result, Evergy, Evergy Kansas Central and Evergy Metro recorded an increase to assets and liabilities of approximately $110 million, $40 million and $80 million, respectively, as of January 1, 2019. Evergy Kansas Central and Evergy Metro have certain lease transactions between them for which the related assets and liabilities are eliminated at consolidated Evergy. The adoption of Topic 842 did not have a material impact on the Evergy Companies' consolidated statements of income and comprehensive income and there was no cumulative-effect adjustment recorded to the opening balance of retained earnings. The Evergy Companies also elected a practical expedient to forgo reassessing existing or expired contracts as leases to determine whether each is in scope of Topic 842 and to forgo reassessing lease classification for existing and expired leases.

See Note 15 for additional disclosures about the Evergy Companies' leases.

MERGER OF GREAT PLAINS ENERGY AND EVERGY KANSAS CENTRAL

9 Months Ended

Sep. 30, 2019

Business Combinations [Abstract]

MERGER OF GREAT PLAINS ENERGY AND KANSAS CENTRAL

MERGER OF GREAT PLAINS ENERGY AND EVERGY KANSAS CENTRAL

Description of Merger Transaction

On June 4, 2018, Evergy completed the mergers contemplated by the Amended Merger Agreement. As a result of the mergers, Great Plains Energy merged into Evergy, with Evergy surviving the merger and King Energy merged into Evergy Kansas Central, with Evergy Kansas Central surviving the merger. Following the completion of these mergers, Evergy Kansas Central and the direct subsidiaries of Great Plains Energy, including Evergy Metro and Evergy Missouri West, became wholly-owned subsidiaries of Evergy.

The merger was structured as a merger of equals in a tax-free exchange of shares that involved no premium paid or received with respect to either Great Plains Energy or Evergy Kansas Central. As a result of the closing of the merger transaction, each outstanding share of Great Plains Energy common stock was converted into 0.5981 shares of Evergy common stock and each outstanding share of Evergy Kansas Central common stock was converted into 1 share of Evergy common stock.

Purchase Price Allocation

Based on an evaluation of the provisions of Accounting Standards Codification (ASC) 805, Business Combinations, Evergy Kansas Central was determined to be the accounting acquirer in the merger. Pursuant to the Amended Merger Agreement, Great Plains Energy's common stock shares were exchanged for Evergy common stock shares at the fixed exchange rate of 0.5981. The total consideration transferred of $6,975.7 million, including $12.5 million for the fair value of equity compensation awards, was based on the closing price of Evergy Kansas Central on June 4, 2018.

The fair value of Great Plains Energy's assets acquired and liabilities assumed as of June 4, 2018, was determined based on significant estimates and assumptions that are judgmental in nature. Third-party valuation specialists were engaged to assist in the valuation of these assets and liabilities.

The significant assets and liabilities recorded at fair values as of the merger date include long-term debt, asset retirement obligations, pension and post-retirement plans, accumulated deferred income tax liabilities and certain other long-term assets and liabilities.

The majority of Great Plains Energy's operations were subject to the rate-setting authority of the Public Service Commission of the State of Missouri (MPSC), the State Corporation Commission of the State of Kansas (KCC) and the Federal Energy Regulatory Commission (FERC) and were accounted for pursuant to GAAP, including the accounting guidance for regulated operations. The rate-setting and cost recovery provisions for Great Plains Energy's regulated operations provided revenue derived from costs including a return on investment of assets and liabilities included in rate base. Except for the significant assets and liabilities for which valuation adjustments were made as discussed above, the fair values of Great Plains Energy's tangible and intangible assets and liabilities subject to these rate-setting provisions approximated their carrying values and the assets and liabilities did not reflect any adjustments to these amounts other than for amounts not included in rate base. The difference between the fair value and pre-merger carrying amounts for Great Plains Energy's long-term debt, asset retirement obligations and pension and post-retirement plans that were related to regulated operations were recorded as a regulatory asset or liability. The excess of the purchase price over the estimated fair values of the assets acquired and liabilities assumed were recognized as goodwill as of the merger date.

The final purchase price allocation to Great Plains Energy's assets and liabilities as of June 4, 2018, is detailed in the following table.



	(millions)
Current assets	$	2,151.7
Property, plant and equipment, net	9,179.7
Goodwill	2,336.6
Other long-term assets, excluding goodwill	1,235.9
Total assets	$	14,903.9
Current liabilities	1,673.9
Long-term liabilities, excluding long-term debt	2,895.7
Long-term debt, net	3,358.6
Total liabilities	$	7,928.2
Total purchase price	$	6,975.7

The purchase price allocation in the table above reflects refinements made to the preliminary fair values of long-term liabilities, excluding long-term debt included in the Evergy Companies' combined 2018 Form 10-K. These refinements include adjustments associated with deferred income taxes that resulted in a decrease to goodwill of $2.3 million.

RECEIVABLES

9 Months Ended

Sep. 30, 2019

Receivables [Abstract]

RECEIVABLES

The Evergy Companies' receivables are detailed in the following table.



	September 30				December 31
		2019				2018
Evergy		(millions)
Customer accounts receivable - billed		$	19.5			$	16.7
Customer accounts receivable - unbilled		155.9				91.2
Other receivables		102.3				95.0
Allowance for doubtful accounts		(8.9		)		(9.2		)
Total		$	268.8			$	193.7
Evergy Kansas Central
Customer accounts receivable - billed		$	—			$	—
Customer accounts receivable - unbilled		60.7				16.6
Other receivables		83.4				71.6
Allowance for doubtful accounts		(3.4		)		(3.9		)
Total		$	140.7			$	84.3
Evergy Metro
Customer accounts receivable - billed		$	9.1			$	7.8
Customer accounts receivable - unbilled		65.0				42.9
Other receivables		14.0				15.8
Allowance for doubtful accounts		(3.9		)		(3.8		)
Total		$	84.2			$	62.7

Evergy's, Evergy Kansas Central's and Evergy Metro's other receivables at September 30, 2019 and December 31, 2018, consisted primarily of receivables from partners in jointly-owned electric utility plants and wholesale sales receivables. As of September 30, 2019, other receivables for Evergy, Evergy Kansas Central and Evergy Metro included receivables from contracts with customers of $45.3 million, $41.3 million and $0.8 million, respectively. As of December 31, 2018, other receivables for Evergy, Evergy Kansas Central and Evergy Metro included receivables from contracts with customers of $65.8 million, $55.9 million and $5.5 million, respectively.

The Evergy Companies recorded bad debt expense related to contracts with customers as summarized in the following table.



	Three Months Ended September 30				Year to Date September 30
	2019		2018		2019		2018
	(millions)
Evergy	$	11.4	$	4.5	$	22.0	$	10.6
Evergy Kansas Central	2.0		1.1		5.4		6.2
Evergy Metro ^(a)	6.8		3.9		11.6		7.5

^(a)Evergy Metro amounts are included in consolidated Evergy from June 4, 2018, the date of the closing of the merger, and thereafter.

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 of the undivided percentage ownership interests in accounts receivable to independent outside investors 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. At September 30, 2019 and December 31, 2018, Evergy's accounts receivable pledged as collateral and the corresponding short-term collateralized note payable were $395.0 million and $365.0 million, respectively. At September 30, 2019 and December 31, 2018, Evergy Kansas Central's accounts receivable pledged as collateral and the corresponding short-term collateralized note payable were $200.0 million and

$185.0 million, respectively. At September 30, 2019 and December 31, 2018, Evergy Metro's accounts receivable pledged as collateral and the corresponding short-term collateralized note payable were $130.0 million.

Each receivable sale facility expires in September 2020. 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	9 Months Ended
RATE MATTERS AND REGULATION	Sep. 30, 2019
Regulated Operations [Abstract]
RATE MATTERS AND REGULATION	RATE MATTERS AND REGULATION KCC Proceedings Evergy Kansas Central 2019 Transmission Delivery Charge (TDC) In March 2019, 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 2019 and are expected to decrease Evergy Kansas Central's annual retail revenues by $7.7 million. Evergy Metro 2019 TDC In April 2019, 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 2019 and are expected to decrease Evergy Metro's annual retail revenues by $8.3 million. Evergy Kansas Central Retail Energy Cost Adjustment (RECA) Recovery of 8% of Jeffrey Energy Center (JEC) As part of the non-unanimous stipulation and agreement approved by the KCC in September 2018 in Evergy Kansas Central's 2018 rate case, it was agreed that in the event that Evergy Kansas Central purchased the 8% ownership interest in JEC that it had historically leased from a trust it would be entitled to file a request with the KCC to recover operating and maintenance and capital costs associated with the 8% ownership through its RECA as these amounts were not reflected in Evergy Kansas Central's rates established as part of the 2018 rate case. In the first quarter of 2019, Evergy Kansas Central entered into an agreement with the trust to extend its lease of the 8% interest in JEC from the previous expiration date of January 2019 to August 2019 and to then purchase the 8% ownership interest from the trust at the time the lease expired. Pursuant to the agreement, Evergy Kansas Central's purchase of the 8% ownership interest of JEC closed in August 2019. In March 2019, Evergy Kansas Central filed an application with the KCC to request recovery through the RECA of deferred lease expense and operating and maintenance expense incurred during the lease extension and future operating and maintenance expense subsequent to the purchase of the 8% ownership interest in JEC. In September 2019, the KCC issued an order finding that the lease extension and subsequent purchase of the 8% ownership interest by Evergy Kansas Central were not prudent and disallowed the recovery from retail customers of all associated capital and operating costs that were incurred during the lease extension and will be incurred in the future. The KCC order also provided that Evergy Kansas Central be allowed to retain any wholesale electricity sales associated with the 8% ownership interest of JEC. As a result of the KCC order in September 2019, Evergy and Evergy Kansas Central recorded an $8.4 million pre-tax loss to operating and maintenance expense in their consolidated statements of income and comprehensive income for the three months ended and year to date September 30, 2019 associated with the write-off of a regulatory asset for the deferred lease expense and other operating expenses. 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 Evergy Kansas Central's and Evergy Metro's annual merger bill credits for the year being measured. As of September 30, 2019, Evergy Kansas Central and Evergy Metro estimate their 2019 annual earnings will not result in a refund obligation. Evergy Kansas Central and Evergy Metro expect to file their 2019 earnings calculations with the KCC in March 2020. The final refund obligation, if any, will be decided by the KCC and could vary from the current estimate. MPSC Proceedings 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 accounting authority order (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 to a regulatory liability the revenues discussed above for consideration in Evergy Missouri West's next rate case, which is expected to be completed no later than 2022. Depending on the MPSC's decision in this next 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 a result of the MPSC order, Evergy has recorded a regulatory liability of $6.5 million as of September 30, 2019 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 and Evergy expects that it will continue to defer such amounts as collected from customers until new rates become effective in Evergy Missouri West's next 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 next rate case based on the relevant facts and circumstances. While Evergy has determined these additional revenues to not be probable of refund, the ultimate resolution of this matter in Evergy Missouri West's next rate case is uncertain and could result in an estimated loss of up to approximately $15 million in excess of the amount accrued per year until Evergy Missouri West's new rates become effective. Evergy's regulatory liability for probable refunds as of September 30, 2019 and estimated loss in excess of the amount accrued represent estimates that could change significantly based on ongoing developments including as a result of an appeal of the MPSC order, decisions in other regulatory proceedings that establish precedent applicable to this matter and positions of parties on this issue in a future Evergy Missouri West rate case. Evergy Missouri West also expects that the MPSC's decision in its next rate case could impact the valuation of its $131.6 million regulatory asset as of September 30, 2019 for retired generation facilities. This regulatory asset is reduced by approximately $7 million of annual amortization expense which is an amount equal to the annual depreciation expense for the asset reflected in retail rates. See "Plant to be Retired, Net" within Note 1 to the consolidated financial statements of the Evergy Companies' 2018 Form 10-K for more information. FERC Proceedings Evergy Kansas Central TFR Evergy Kansas Central's TFR, effective in January 2019, includes projected 2019 transmission capital expenditures and operating costs and is expected to decrease annual transmission revenues by $11.2 million when compared to 2018. This updated rate provided the basis for Evergy Kansas Central's request with the KCC to adjust its retail prices to include updated transmission costs as discussed above. Evergy Kansas Central's TFR, effective in January 2020, includes projected 2020 transmission capital expenditures and operating costs and is expected to decrease annual transmission revenues by $13.6 million when compared to 2019. This updated rate will provide the basis for any subsequent requests by Evergy Kansas Central with the KCC to adjust its retail prices to include updated transmission costs. Evergy Metro TFR Evergy Metro's TFR, effective in January 2019, includes projected 2019 transmission capital expenditures and operating costs and is expected to decrease annual transmission revenues by $2.8 million when compared to 2018. This updated rate provided the basis for Evergy Metro's request with the KCC to adjust its retail prices to include updated transmission costs as discussed above. Evergy Metro's TFR, effective in January 2020, includes projected 2020 transmission capital expenditures and operating costs and is expected to decrease annual transmission revenues by $1.7 million when compared to 2019. This updated rate will provide the basis for any subsequent request by Evergy Metro with the KCC to adjust its retail prices to include updated transmission costs.

PENSION PLANS AND POST-RETIREMENT BENEFITS

9 Months Ended

Sep. 30, 2019

Retirement Benefits [Abstract]

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 94% ownership share of Wolf Creek Generating Station's (Wolf Creek) defined benefit plans, consisting of Evergy Kansas Central'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 the three months ended and year to date September 30, 2019, Evergy and Evergy Metro recorded pension settlement charges of $14.5 million and $20.8 million, respectively, as a result of accelerated pension distributions related to voluntary severance programs. Evergy and Evergy Metro deferred substantially all of the charges to a regulatory asset and expects to recover these amounts over future periods pursuant to regulatory agreements.

The following tables provide the components of net periodic benefit costs prior to the effects of capitalization and sharing with joint owners of power plants.



	Pension Benefits									Post-Retirement Benefits
Three Months Ended September 30, 2019	Evergy			Evergy Kansas Central			Evergy Metro			Evergy			Evergy Kansas Central			Evergy Metro
Components of net periodic benefit costs	(millions)
Service cost	$	19.1		$	7.3		$	11.8		$	0.6		$	0.2		$	0.4
Interest cost	27.5			13.4			14.1			2.6			1.4			1.2
Expected return on plan assets	(27.0		)	(13.7		)	(12.3		)	(2.5		)	(1.7		)	(0.8		)
Prior service cost	0.5			0.5			0.2			0.1			0.1			—
Recognized net actuarial (gain)/loss	6.9			6.2			12.2			(0.3		)	(0.1		)	(0.3		)
Settlement and special termination benefits	14.5			—			20.8			—			—			—
Net periodic benefit costs before regulatory adjustment and intercompany allocations	41.5			13.7			46.8			0.5			(0.1		)	0.5
Regulatory adjustment	4.9			0.5			(14.7		)	(0.8		)	(0.7		)	0.1
Intercompany allocations	—			—			(13.6		)	—			—			(0.2		)
Net periodic benefit costs (income)	$	46.4		$	14.2		$	18.5		$	(0.3	)	$	(0.8	)	$	0.4

	Pension Benefits									Post-Retirement Benefits
Year to Date September 30, 2019	Evergy			Evergy Kansas Central			Evergy Metro			Evergy			Evergy Kansas Central			Evergy Metro
Components of net periodic benefit costs	(millions)
Service cost	$	57.3		$	21.8		$	35.5		$	1.9		$	0.8		$	1.1
Interest cost	82.4			40.3			42.1			7.9			4.2			3.7
Expected return on plan assets	(80.9		)	(41.1		)	(36.9		)	(7.5		)	(5.0		)	(2.5		)
Prior service cost	1.5			1.3			0.7			0.3			0.3			—
Recognized net actuarial (gain)/loss	20.6			19.0			36.7			(0.9		)	(0.4		)	(1.1		)
Settlement and special termination benefits	14.5			—			20.8			—			—			—
Net periodic benefit costs before regulatory adjustment and intercompany allocations	95.4			41.3			98.9			1.7			(0.1		)	1.2
Regulatory adjustment	30.4			1.5			(15.9		)	(2.5		)	(2.2		)	0.3
Intercompany allocations	—			—			(27.6		)	—			—			(0.3		)
Net periodic benefit costs (income)	$	125.8		$	42.8		$	55.4		$	(0.8	)	$	(2.3	)	$	1.2



	Pension Benefits									Post-Retirement Benefits
Three Months Ended September 30, 2018	Evergy			Evergy Kansas Central			Evergy Metro			Evergy			Evergy Kansas Central			Evergy Metro
Components of net periodic benefit costs	(millions)
Service cost	$	20.2		$	8.0		$	12.2		$	0.7		$	0.4		$	0.5
Interest cost	26.3			12.7			12.0			2.5			1.2			1.2
Expected return on plan assets	(27.0		)	(13.9		)	(13.9		)	(2.5		)	(1.8		)	(0.7		)
Prior service cost	0.3			0.2			0.2			0.1			0.1			—
Recognized net actuarial (gain)/loss	8.1			8.1			10.9			(0.1		)	(0.1		)	—
Net periodic benefit costs before regulatory adjustment and intercompany allocations	27.9			15.1			21.4			0.7			(0.2		)	1.0
Regulatory adjustment	2.6			2.8			0.7			(0.4		)	(0.4		)	0.1
Intercompany allocations	—			—			(4.9		)	—			—			(0.2		)
Net periodic benefit costs (income)	$	30.5		$	17.9		$	17.2		$	0.3		$	(0.6	)	$	0.9

	Pension Benefits									Post-Retirement Benefits
Year to Date September 30, 2018	Evergy			Evergy Kansas Central			Evergy Metro^(a)			Evergy			Evergy Kansas Central			Evergy Metro^(a)
Components of net periodic benefit costs	(millions)
Service cost	$	40.4		$	24.1		$	36.5		$	1.5		$	1.0		$	1.5
Interest cost	56.2			38.1			37.4			5.4			3.7			3.6
Expected return on plan assets	(59.3		)	(41.9		)	(41.6		)	(6.2		)	(5.2		)	(2.1		)
Prior service cost	0.6			0.5			0.5			0.3			0.3			—
Recognized net actuarial (gain)/loss	24.4			24.4			33.8			(0.4		)	(0.4		)	(0.1		)
Net periodic benefit costs before regulatory adjustment and intercompany allocations	62.3			45.2			66.6			0.6			(0.6		)	2.9
Regulatory adjustment	8.4			8.4			2.1			(1.3		)	(1.3		)	(0.2		)
Intercompany allocations	—			—			(17.1		)	—			—			(0.8		)
Net periodic benefit costs (income)	$	70.7		$	53.6		$	51.6		$	(0.7	)	$	(1.9	)	$	1.9

^(a)Evergy Metro amounts are included in consolidated Evergy from June 4, 2018, the date of the closing of the merger, and thereafter.

The components of net periodic benefit costs other than the service cost component are included in other expense on the Evergy Companies' consolidated statements of income and comprehensive income.

Year to date September 30, 2019, Evergy, Evergy Kansas Central and Evergy Metro made pension contributions of $54.6 million, $36.0 million and $18.6 million, respectively. Evergy expects to make additional pension contributions of $73.7 million in 2019 to satisfy the Employee Retirement Income Security Act of 1974, as amended (ERISA) funding requirements and KCC and MPSC rate orders, of which $7.1 million is expected to be paid by Evergy Kansas Central and $66.6 million is expected to be paid by Evergy Metro.

Year to date September 30, 2019, Evergy, Evergy Kansas Central and Evergy Metro made post-retirement benefit contributions of $2.2 million, $1.1 million and $1.1 million, respectively. Evergy and Evergy Metro expect to make additional contributions of $1.4 million in 2019 to the post-retirement benefit plans.

FAIR VALUE MEASUREMENTS

9 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

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 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. Evergy entered into the interest rate swap agreement in December 2018. The $69.8 million pre-tax loss was recorded in other comprehensive loss on Evergy's consolidated statements of comprehensive income and is being reclassified from accumulated other comprehensive loss to interest expense over the ten-year term of the debt. For the three months ended and year to date September 30, 2019, a $0.2 million loss has been reclassified from accumulated other comprehensive loss to interest expense on Evergy's consolidated statements of comprehensive income. As of September 30, 2019, Evergy expects to amortize $5.2 million to earnings from accumulated other comprehensive loss over the next twelve months.

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.



	September 30, 2019				December 31, 2018
	Book Value		Fair Value		Book Value		Fair Value
Long-term debt^(a)	(millions)
Evergy^(b)	$	9,000.3	$	9,843.1	$	7,341.7	$	7,412.1
Evergy Kansas Central	3,685.6		4,139.0		3,689.8		3,771.3
Evergy Metro	2,524.6		2,962.7		2,530.1		2,637.5
Long-term debt of variable interest entities^(a)
Evergy	$	51.1	$	51.3	$	81.4	$	81.3
Evergy Kansas Central	51.1		51.3		81.4		81.3

^(a)Includes current maturities.

^(b)Book value as of September 30, 2019 and December 31, 2018, includes $129.2 million and $144.8 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	September 30, 2019			Level 1		Level 2			Level 3			NAV
Evergy Kansas Central		(millions)
Assets
Nuclear decommissioning trust^(a)
Domestic equity funds		$	84.0	$	77.5		$	—		$	—		$	6.5
International equity funds		46.7		46.7			—			—			—
Core bond fund		36.6		36.6			—			—			—
High-yield bond fund		21.3		21.3			—			—			—
Emerging markets bond fund		17.2		17.2			—			—			—
Combination debt/equity/other fund		15.4		15.4			—			—			—
Alternative investments fund		24.8		—			—			—			24.8
Real estate securities fund		12.4		—			—			—			12.4
Cash equivalents		0.1		0.1			—			—			—
Total nuclear decommissioning trust		258.5		214.8			—			—			43.7
Rabbi trust
Core bond fund		25.5		—			—			—			25.5
Combination debt/equity/other fund		6.1		—			—			—			6.1
Cash equivalents		0.2		0.2			—			—			—
Total rabbi trust		31.8		0.2			—			—			31.6
Total		$	290.3	$	215.0		$	—		$	—		$	75.3
Evergy Metro
Assets
Nuclear decommissioning trust^(a)
Equity securities		$	193.7	$	193.7		$	—		$	—		$	—
Debt securities
U.S. Treasury		50.1		50.1			—			—			—
U.S. Agency		0.4		—			0.4			—			—
State and local obligations		2.2		—			2.2			—			—
Corporate bonds		33.0		—			33.0			—			—
Foreign governments		0.1		—			0.1			—			—
Cash equivalents		2.6		2.6			—			—			—
Other		0.4		—			0.4			—			—
Total nuclear decommissioning trust		282.5		246.4			36.1			—			—
Self-insured health plan trust^(b)
Equity securities		0.5		0.5			—			—			—
Debt securities		6.1		1.3			4.8			—			—
Cash and cash equivalents		3.7		3.7			—			—			—
Total self-insured health plan trust		10.3		5.5			4.8			—			—
Total		$	292.8	$	251.9		$	40.9		$	—		$	—
Other Evergy
Assets
Rabbi trusts
Fixed income fund		$	13.3	$	—		$	—		$	—		$	13.3
Cash and cash equivalents		0.5		0.5			—			—			—
Total rabbi trusts		$	13.8	$	0.5		$	—		$	—		$	13.3
Evergy
Assets
Nuclear decommissioning trust^(a)		$	541.0	$	461.2		$	36.1		$	—		$	43.7
Rabbi trusts		45.6		0.7			—			—			44.9
Self-insured health plan trust^(b)		10.3		5.5			4.8			—			—
Total		$	596.9	$	467.4		$	40.9		$	—		$	88.6



Description	December 31, 2018			Level 1			Level 2			Level 3			NAV
Evergy Kansas Central		(millions)
Assets
Nuclear decommissioning trust^(a)
Domestic equity funds		$	70.6		$	63.9		$	—		$	—		$	6.7
International equity funds		36.2			36.2			—			—			—
Core bond fund		37.5			37.5			—			—			—
High-yield bond fund		18.9			18.9			—			—			—
Emerging markets bond fund		15.4			15.4			—			—			—
Combination debt/equity/other fund		12.9			12.9			—			—			—
Alternative investments fund		24.1			—			—			—			24.1
Real estate securities fund		11.8			—			—			—			11.8
Cash equivalents		0.1			0.1			—			—			—
Total nuclear decommissioning trust		227.5			184.9			—			—			42.6
Rabbi trust
Core bond fund		24.8			—			—			—			24.8
Combination debt/equity/other fund		5.6			—			—			—			5.6
Cash equivalents		0.2			0.2			—			—			—
Total rabbi trust		30.6			0.2			—			—			30.4
Total		$	258.1		$	185.1		$	—		$	—		$	73.0
Evergy Metro
Assets
Nuclear decommissioning trust^(a)
Equity securities		$	166.6		$	166.6		$	—		$	—		$	—
Debt securities
U.S. Treasury		42.1			42.1			—			—			—
U.S. Agency		0.4			—			0.4			—			—
State and local obligations		2.1			—			2.1			—			—
Corporate bonds		30.9			—			30.9			—			—
Foreign governments		0.1			—			0.1			—			—
Cash equivalents		1.7			1.7			—			—			—
Other		0.7			0.7			—			—			—
Total nuclear decommissioning trust		244.6			211.1			33.5			—			—
Self-insured health plan trust^(b)
Equity securities		0.5			0.5			—			—			—
Debt securities		3.9			0.3			3.6			—			—
Cash and cash equivalents		8.0			8.0			—			—			—
Total self-insured health plan trust		12.4			8.8			3.6			—			—
Total		$	257.0		$	219.9		$	37.1		$	—		$	—
Other Evergy
Assets
Rabbi trusts
Fixed income fund		$	13.2		$	—		$	—		$	—		$	13.2
Total rabbi trusts		$	13.2		$	—		$	—		$	—		$	13.2
Liabilities
Interest rate swaps^(c)		$	5.4		$	—		$	5.4		$	—		$	—
Total		$	5.4		$	—		$	5.4		$	—		$	—
Evergy
Assets
Nuclear decommissioning trust^(a)		$	472.1		$	396.0		$	33.5		$	—		$	42.6
Rabbi trust		43.8			0.2			—			—			43.6
Self-insured health plan trust^(b)		12.4			8.8			3.6			—			—
Total		$	528.3		$	405.0		$	37.1		$	—		$	86.2
Liabilities
Interest rate swaps^(c)		$	5.4		$	—		$	5.4		$	—		$	—
Total		$	5.4		$	—		$	5.4		$	—		$	—


^(a)	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)	The fair value of interest rate swaps are determined by calculating the net present value of expected payments and receipts under the interest rate swaps using observable market inputs including interest rates and LIBOR swap rates.

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.



	September 30, 2019				December 31, 2018				September 30, 2019
	Fair		Unfunded		Fair		Unfunded		Redemption	Length of
	Value		Commitments		Value		Commitments		Frequency	Settlement
Evergy Kansas Central	(millions)
Nuclear decommissioning trust:
Domestic equity funds	$	6.5	$	3.6	$	6.7	$	4.3	(a)	(a)
Alternative investments fund^(b)	24.8		—		24.1		—		Quarterly	65 days
Real estate securities fund^(b)	12.4		—		11.8		—		Quarterly	65 days
Total	$	43.7	$	3.6	$	42.6	$	4.3
Rabbi trust:
Core bond fund	$	25.5	$	—	$	24.8	$	—	(c)	(c)
Combination debt/equity/other fund	6.1		—		5.6		—		(c)	(c)
Total	$	31.6	$	—	$	30.4	$	—
Other Evergy
Rabbi trusts:
Fixed income fund	$	13.3	$	—	$	13.2	$	—	(c)	(c)
Total Evergy investments at NAV	$	88.6	$	3.6	$	86.2	$	4.3

^(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 fund occurred in the second quarter of 2016 and first quarter of 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 will be 15 years after the initial closing date, 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.



	Three Months Ended September 30						Year to Date September 30
	2019			2018			2019		2018
Evergy Kansas Central	(millions)
Nuclear decommissioning trust - equity securities	$	0.2		$	6.5		$	26.2	$	(6.4	)
Rabbi trust - equity securities	0.5			3.7			2.7		3.2
Total	$	0.7		$	10.2		$	28.9	$	(3.2	)
Evergy Metro^(a)
Nuclear decommissioning trust - equity securities	$	(0.5	)	$	8.6		$	24.7	$	9.1
Nuclear decommissioning trust - debt securities	1.5			(0.5		)	5.9		(2.8		)
Total	$	1.0		$	8.1		$	30.6	$	6.3
Evergy
Nuclear decommissioning trust - equity securities	$	(0.3	)	$	15.1		$	50.9	$	1.1
Nuclear decommissioning trust - debt securities	1.5			(0.5		)	5.9		(0.8		)
Rabbi trusts - equity securities	0.9			3.7			2.4		3.1
Total	$	2.1		$	18.3		$	59.2	$	3.4

^(a)Evergy Metro amounts are included in consolidated Evergy from June 4, 2018, the date of the closing of the merger, and thereafter.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

COMMITMENTS AND CONTINGENCIES	9 Months Ended
COMMITMENTS AND CONTINGENCIES	Sep. 30, 2019
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. 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. Cross-State Air Pollution Update Rule In September 2016, the Environmental Protection Agency (EPA) finalized the Cross-State Air Pollution Update Rule (CSAPR). The final rule addresses interstate transport of nitrogen oxides emissions in 22 states including Kansas, Missouri and Oklahoma during the ozone season and the impact from the formation of ozone on downwind states with respect to the 2008 ozone National Ambient Air Quality Standards (NAAQS). Starting with the 2017 ozone season, the final rule revised the existing ozone season allowance budgets for Missouri and Oklahoma and established an ozone season budget for Kansas. In December 2018, the EPA finalized the CSAPR Close-Out Rule, which determined that the existing CSAPR Update Rule fully addresses applicable states' interstate pollution transport obligations for the 2008 ozone NAAQS. Therefore, the EPA is proposing no additional reduction in the current ozone season allowance budgets in order to address obligations for the 2008 ozone NAAQS. Various states and others challenged the rule in the U.S. Court of Appeals for the D.C. Circuit (D.C. Circuit). In September 2019, the D.C. Circuit granted these petitions and remanded a portion of the CSAPR Update Rule back to EPA. The D.C. Circuit found that the rule does not establish deadlines for upwind states to eliminate emission impacts on downwind states' nonattainment areas. This is only applicable to those upwind states determined to have a significant impact on the applicable nonattainment areas. Due to the uncertainty in what the future CSAPR Update Rule will include, the Evergy Companies cannot determine the impact on their operations or consolidated financial results, but the impacts could be material. National Ambient Air Quality Standards Under the Clean Air Act Amendments of 1990 (CAA), the EPA set NAAQS for certain emissions known as the "criteria pollutants" considered harmful to public health and the environment, including two classes of particulate matter (PM), ozone, nitrogen dioxide (NO₂) (a precursor to ozone), carbon monoxide and sulfur dioxide (SO₂), which result from fossil fuel combustion. Areas meeting the NAAQS are designated attainment areas while those that do not meet the NAAQS are considered nonattainment areas. Each state must develop a plan to bring nonattainment areas into compliance with the NAAQS. NAAQS must be reviewed by the EPA at five-year intervals. In October 2015, the EPA strengthened the ozone NAAQS by lowering the standards from 75 ppb to 70 ppb. In November 2017, the EPA designated all counties in the State of Kansas as well as the Missouri counties in Evergy Metro's and Evergy Missouri West's service territories as attainment/unclassifiable. It is not expected that this change will have a material impact on the Evergy Companies' consolidated financial results. If areas surrounding the Evergy Companies' facilities are designated in the future as nonattainment and/or it is required to install additional equipment to control emissions at facilities of the Evergy Companies, it could have a material impact on the operations and consolidated financial results of the Evergy Companies. Greenhouse Gases Burning coal and other fossil fuels releases carbon dioxide (CO₂) and other gases referred to as greenhouse gases (GHG). Various regulations under the federal CAA limit CO₂ 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 October 2015, the EPA published a rule establishing new source performance standards (NSPS) for GHGs that limit CO₂ emissions for new, modified and reconstructed coal and natural gas fueled electric generating units to various levels per MWh depending on various characteristics of the units. Legal challenges to the GHG NSPS have been filed in the D.C. Circuit by various states and industry members. Also, in October 2015, the EPA published a rule establishing guidelines for states to regulate CO₂ emissions from existing power plants. The standards for existing plants are known as the Clean Power Plan (CPP). Under the CPP, achievement of interim emissions performance rates would have been required beginning in 2022 and final emissions performance rates would have been required by 2030. Legal challenges to the CPP were filed by groups of states and industry members, including Evergy Kansas Central, in the D.C. Circuit. The CPP was stayed by the Supreme Court in February 2016 and the D.C. Circuit has subsequently held the litigation in abeyance. Accordingly, the CPP was not implemented by the states. In April 2017, the EPA published in the Federal Register a notice of withdrawal of the proposed CPP federal plan, proposed model trading rules and proposed Clean Energy Incentive Program design details. Also, in April 2017, the EPA published a notice in the Federal Register that it was initiating administrative reviews of the CPP and the GHG NSPS. In October 2017, the EPA issued a proposed rule to repeal the CPP. The proposed rule indicates the CPP exceeds the EPA’s authority. The EPA solicited comments on the legal interpretations contained in this rulemaking. In August 2018, the EPA published in the Federal Register proposed regulations, which contained (1) emission guidelines for GHG emissions from existing electric utility generating units (EGUs), (2) revisions to emission guideline implementing regulations and (3) revisions to the new source review (NSR) program. These emission guidelines are better known as the Affordable Clean Energy (ACE) Rule. In July 2019, the EPA published in the Federal Register the final ACE Rule with one significant change from the proposal. The NSR program revisions were not included in the final version and are expected to be addressed in a future rulemaking. The ACE Rule establishes emission guidelines for states to use in the development of plans to reduce GHG emissions from existing coal-fired EGUs. This rule defines the "best system of emission reduction" (BSER) for GHG emissions from existing coal-fired EGUs as on-site, heat-rate efficiency improvements. The final rule also provides states with a list of candidate technologies that can be used to establish standards of performance and incorporate these performance standards into state plans. In order for the states to be able to effectively implement the emission guidelines contained in the ACE Rule, the EPA is finalizing new regulations under 111(d) of the CAA to help clarify this process. The ACE Rule became effective in September 2019. In conjunction with the finalization of the ACE Rule, the EPA also repealed the CPP. Also in September 2019, the D.C. Circuit granted motions to dismiss challenges to the CPP and challenges to EPA's denial of reconsideration of the CPP. In December 2018, the EPA released a proposed rule to revise the existing GHG NSPS for new, modified and reconstructed fossil fuel-fired EGUs, which was issued in October 2015. This proposed rule would determine that BSER for new EGUs is "the most efficient demonstrated steam cycle (e.g., supercritical steam conditions for large units and subcritical steam conditions for small units) in combination with the best operating practices." This replaces the current determination that BSER for these units is the use of partial carbon capture and sequestration technology. The EPA is also proposing to address, in potential future rule making, existing operational limitations imposed by the rule on aero-derivative simple cycle combustion turbines. Due to uncertainty regarding what future state implementation plans will require for compliance with the ACE Rule as well as legal challenges that have been filed, the Evergy Companies cannot determine the impact on their operations or consolidated financial results, but the cost to comply with the ACE Rule, should it be upheld and implemented in its current or a substantially similar form could be material. Water The Evergy Companies discharge some of the water used in generation and other operations. This water may contain substances deemed to be pollutants. A November 2015 EPA rule 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 2017, the EPA announced it is reconsidering the ELG rule. In September 2017, the EPA finalized a rule to postpone the compliance dates for the new, more stringent, effluent limitations and pretreatment standards for bottom ash transport water and flue gas desulfurization wastewater. These compliance dates have been postponed for two years while the EPA completes its administrative reconsideration of the ELG rule. In April 2019, the U.S. Court of Appeals for the 5th Circuit (5th Circuit) issued a ruling that vacates and remands portions of the ELG rule. The 5th Circuit ruled in favor of environmental groups who argued that EPA did not set appropriate limits for the best available technology economically achievable for legacy waste water and leachate. The Evergy Companies are evaluating the 5th Circuit ruling, the existing ELG rule and related developments and cannot predict the resulting impact on their operations or consolidated financial results but believe costs to comply could be material if the rule is implemented in its current or substantially similar form. On November 4, 2019, the EPA released a pre-publication version of a proposed modification to the ELG rule. The proposed rule modifies 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 also delayed by two years to December 31, 2025. The Evergy Companies are in the process of reviewing the proposed rule and the costs to comply with these changes could be material. In October 2014, the EPA's final standards for cooling intake structures at power plants to protect aquatic life took effect. The standards, based on Section 316(b) of the federal Clean Water Act (CWA), require subject facilities to choose among seven best available technology options to reduce fish impingement. In addition, some facilities must conduct studies to assist permitting authorities to determine whether and what site-specific controls, if any, would be required to reduce entrainment of aquatic organisms. The Evergy Companies' current analysis indicates this rule will not have a significant impact on their coal plants that employ cooling towers or cooling lakes that can be classified as closed cycle cooling and do not expect the impact from this rule to be material. Plants without closed cycle cooling are under evaluation for compliance with these standards and may require additional controls that could be material. Evergy Metro holds a permit from the Missouri Department of Natural Resources (MDNR) covering water discharge from its Hawthorn Station. The permit authorizes Evergy Metro to, among other things, withdraw water from the Missouri River for cooling purposes and return the heated water to the Missouri River. Evergy Metro has applied for a renewal of this permit and the EPA has submitted an interim objection letter regarding the allowable amount of heat that can be contained in the returned water. Until this matter is resolved, Evergy Metro continues to operate under its current permit. Evergy and Evergy Metro cannot predict the outcome of this matter; however, while less significant outcomes are possible, this matter may require a reduction in generation, installation of cooling towers or other technology to cool the water, or both, any of which could have a material impact on Evergy's and Evergy Metro's operations and consolidated financial results. In June 2015, the EPA along with the U.S. Army Corps of Engineers issued a final rule, effective August 2015, defining the Waters of the United States (WOTUS) for purposes of the CWA. Various states and others filed lawsuits challenging the WOTUS rule. In February 2018, the EPA and the U.S. Army Corps of Engineers finalized a rule adding an applicability date to the 2015 rule, which made the implementation date of the rule February 2020. In October 2019, the EPA and the U.S. Army Corps of Engineers issued a final rule that will repeal the 2015 rule effective in December 2019. This new rule recodifies the regulatory definition of WOTUS that existed before the 2015 rule. Regulation of Coal Combustion Residuals In the course of operating their coal generation plants, the Evergy Companies produce coal combustion residuals (CCRs), including fly ash, gypsum and bottom ash. Some of this ash production is recycled, principally by selling to the aggregate industry. The EPA published a rule to regulate CCRs in April 2015, which will require additional CCR handling, processing and storage equipment and closure of certain ash disposal units. The Water Infrastructure Improvements for the Nation (WIIN) Act allows states to achieve delegated authority for CCR rules from the EPA. The Kansas Department of Health and Environment (KDHE) and MDNR have both determined that they will wait before proceeding with plans to regulate CCRs until current legal action associated with the CCR rule is final and planned upcoming modifications to the CCR rule are complete. On July 30, 2018, the EPA published in the Federal Register a final rule called the Phase I, Part I CCR Remand Rule in order to modify portions of the 2015 rulemaking. The Phase I, Part I rule provides a timeline extension for unlined impoundments and landfills that must close due to groundwater impacts or location restriction and sets risk-based limits for certain groundwater constituents where a maximum contaminant level did not previously exist. On August 21, 2018, the D.C. Circuit issued a ruling in the CCR rule litigation between the Utility Solid Waste Activities Group, the EPA and environmental organizations. Portions of the rule were vacated and were remanded back to the EPA for modification. Potential revisions to remanded sections will force all unlined surface impoundments to close regardless of groundwater conditions. Any changes to the rule based on this court decision will require additional rulemaking from the EPA. In October 2018, a coalition of environmental groups (including Sierra Club) filed a petition for review in the D.C. Circuit challenging the Phase I, Part I revisions to the CCR Rule. In November 2018, this coalition requested the EPA to stay the October 31, 2020, deadline extension for initiating closure for unlined impoundments and landfills that must close due to groundwater impacts or location restrictions. The EPA rejected this request and the coalition filed a petition with the D.C. Circuit for a similar stay. In response, the EPA filed a motion with the D.C. Circuit to voluntarily remand the Part I, Phase I rule. In March 2019, the D.C. Circuit issued a ruling to grant EPA's motion to remand the rule. This ruling maintains the current October 31, 2020, deadline extension. As the EPA works on a rule modification, it is possible that this October 31, 2020, deadline will be modified. If the date is accelerated, some CCR units in the Evergy Companies' fleet could have to initiate closure on an earlier timeline than currently planned, the results of which could be material. On August 14, 2019, the EPA published in the Federal Register a proposed rule called the Phase II CCR Rule. This rule modifies the current CCR rule in response to court remands and EPA settlements stemming from litigation involving the original rule. This proposed rule, in its current form, is not expected to have a material impact on the Evergy Companies' operations or consolidated financial results. On November 4, 2019, the EPA released a pre-publication version of a proposed rule modification called the "Phase A CCR Rule." This proposal addresses the D.C. Circuit-ruled vacatur from August 2018 along with the voluntary remand that occurred in March 2019. The proposal requires a deadline of August 31, 2020 for unlined and clay-lined surface impoundments to stop receiving waste and to initiate closure compared with the existing deadline of October 31, 2020. There is also an option for a 90-day extension on a case-by-case basis. The proposal also allows these surface impoundments to continue operating until October 2028 if there is a commitment to retire the associated coal-fired boiler(s). The Evergy Companies are in the process of reviewing the proposed rule and the costs to comply with these changes could be material. The Evergy Companies have recorded asset retirement obligations (AROs) for their current estimates for the closure of ash disposal ponds, 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. If revisions to these AROs are necessary, the impact on the Evergy Companies' operations or consolidated financial results could be material.

RELATED PARTY TRANSACTIONS AND RELATIONSHIPS

9 Months Ended

Sep. 30, 2019

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. Transactions between Evergy Kansas Central and either Evergy Metro or Evergy Missouri West prior to June 4, 2018, the date of the merger, are not reflected below.

Jointly-Owned Plants and Shared Services

Evergy Metro employees 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. The operating expenses and capital costs billed from Evergy Metro to Evergy Missouri West were $41.6 million and $125.8 million for the three months ended and year to date September 30, 2019, respectively. These costs totaled $43.4 million and $139.6 million for the three months ended and year to date September 30, 2018, respectively.

Evergy Kansas Central employees manage JEC and operate its facilities at cost, including Evergy Missouri West's 8% ownership interest in JEC. The operating expenses and capital costs billed from Evergy Kansas Central to Evergy Missouri West for JEC and other various business activities were $4.5 million and $17.2 million for the three months ended and year to date September 30, 2019, respectively. These costs totaled $0.8 million and $4.5 million for the three months ended and year to date September 30, 2018, respectively.

Evergy Metro employees manage La Cygne Station and operate its facilities at cost, including Evergy Kansas Central's 50% interest in La Cygne Station. Evergy Metro and Evergy Kansas Central employees 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 from Evergy Metro to Evergy Kansas Central were $33.0 million and $108.8 million for the three months ended and year to date September 30, 2019, respectively. These costs totaled $35.5 million and $50.8 million for the three months and year to date September 30, 2018, respectively. The operating and capital costs billed from Evergy Kansas Central to Evergy Metro were $9.7 million and $26.0 million for the three months ended and year to date September 30, 2019, respectively. These costs totaled $4.8 million and $10.8 million for the three months ended and year to date September 30, 2018, respectively.

Money Pool

Evergy Metro and Evergy Missouri West are also authorized to participate in the Evergy, Inc. money pool, an internal financing arrangement in which funds may be lent on a short-term basis to Evergy Metro and Evergy

Missouri West from Evergy, Inc. and between Evergy Metro and Evergy Missouri West. At September 30, 2019 and December 31, 2018, Evergy Metro had no outstanding receivables or payables 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.



	September 30			December 31
	2019			2018
Evergy Kansas Central	(millions)
Net receivable from Evergy Missouri West	$	1.7		$	2.6
Net payable to Evergy Metro	(6.9		)	(13.5		)
Net payable to Evergy	(0.3		)	(1.4		)

Evergy Metro
Net receivable from Evergy Missouri West	$	66.7		$	72.6
Net receivable from Evergy Kansas Central	6.9			13.5
Net receivable from Evergy	16.7			15.7

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. As of September 30, 2019 and December 31, 2018, Evergy Kansas Central had income taxes receivable from Evergy of $6.1 million and $42.7 million, respectively. As of September 30, 2019 and December 31, 2018, Evergy Metro had income taxes payable to Evergy of $10.6 million and $2.0 million, respectively.

Leases

Evergy Metro leases certain transmission equipment from Evergy Kansas Central. This lease was entered into prior to the merger in an arms-length transaction and is accounted for as an operating lease. As of September 30, 2019, Evergy Metro had a right-of-use asset of $29.6 million recorded within other long-term assets, $0.6 million of lease liability recorded in other current liabilities and $29.0 million of lease liability recorded in other long-term liabilities on its consolidated balance sheet related to this lease. The assets and liabilities related to this lease between Evergy Kansas Central and Evergy Metro are eliminated at consolidated Evergy.

SHAREHOLDERS' EQUITY	9 Months Ended
SHAREHOLDERS' EQUITY	Sep. 30, 2019
Stockholders' Equity Note [Abstract]
SHAREHOLDERS' EQUITY	SHAREHOLDERS' EQUITY Common Stock Repurchase Program In July 2018, the Evergy Board authorized the repurchase of up to 60 million shares of Evergy's common stock. Although this repurchase authorization has no expiration date, Evergy expects to repurchase approximately 60 million shares by mid-2020. Evergy is utilizing and plans to continue to utilize various methods to effectuate the share repurchase program, including but not limited to, a series of transactions that may include accelerated share repurchases (ASRs), open market transactions or other means, subject to market conditions and applicable legal requirements. The repurchase program may be suspended, discontinued or resumed at any time. Year to date September 30, 2019, Evergy had total repurchases of common stock of $1,628.7 million and had repurchased 27.5 million shares under the repurchase program. Since its inception, Evergy has made total repurchases of common stock of approximately $2.7 billion and has repurchased 43.9 million shares under the repurchase program. These repurchase totals include shares repurchased under ASR agreements, one of which had not reached final settlement as of September 30, 2019, and are discussed further below. In November 2018, Evergy entered into an ASR agreement with a financial institution to purchase $475.0 million of Evergy common stock. In December 2018, the financial institution delivered to Evergy 6.4 million shares of common stock, representing a partial settlement of the contract, based on then-current market prices and Evergy paid a total of $475.0 million. The ASR agreement reached final settlement in February 2019 and resulted in the delivery of an additional 1.9 million shares to Evergy based on the average daily volume weighted-average price of Evergy common stock during the term of the ASR agreement, less a negotiated discount. In March 2019, Evergy entered into an ASR agreement with a financial institution to purchase $450.0 million of Evergy common stock. In March 2019, the financial institution delivered to Evergy 6.3 million shares of common stock, representing a partial settlement of the contract, based on then-current market prices and Evergy paid a total of $450.0 million. The ASR agreement reached final settlement in June 2019 and resulted in the delivery of an additional 1.5 million shares to Evergy based on the average daily volume weighted-average price of Evergy common stock during the term of the ASR agreement, less a negotiated discount. In June 2019, Evergy entered into an ASR agreement with a financial institution to purchase $500.0 million of Evergy common stock. In June 2019, the financial institution delivered to Evergy 7.1 million shares of common stock, representing a partial settlement of the contract, based on then-current market prices and Evergy paid a total of $500.0 million. The ASR agreement reached final settlement in September 2019 and resulted in the delivery of an additional 1.0 million shares to Evergy based on the average daily volume weighted-average price of Evergy common stock during the term of the ASR agreement, less a negotiated discount. In September 2019, Evergy entered into an ASR agreement with a financial institution to purchase $500.0 million of Evergy common stock. In September 2019, the financial institution delivered to Evergy 6.6 million shares of common stock, representing a partial settlement of the contract, based on then-current market prices and Evergy paid a total of $500.0 million. The final number of shares of Evergy common stock that Evergy may receive or be required to remit upon settlement of the ASR agreement will be based on the average daily volume weighted-average price of Evergy common stock during the term of the ASR agreement, less a negotiated discount. Final settlement of the ASR agreement will occur by December 2019, but may occur earlier at the option of the financial institution. Evergy expects that the final settlement of the ASR agreement will result in the delivery of additional shares of common stock to Evergy at no additional cost. Evergy reflects ASRs as a repurchase of common stock in the period the shares are delivered for purposes of calculating earnings per share and as forward contracts indexed to its own common stock. Evergy's ASRs have met all of the applicable criteria for equity classification and therefore are not accounted for as derivative instruments. 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 September 30, 2019, 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 $120.0 million. Evergy's subsidiaries had restricted net assets of approximately $5.0 billion as of September 30, 2019. These restrictions are not expected to affect the Evergy Companies' ability to pay dividends at the current level for the foreseeable future.

TAXES

9 Months Ended

Sep. 30, 2019

Income Tax Disclosure [Abstract]

TAXES

Components of income tax expense are detailed in the following tables.



Evergy
	Three Months Ended September 30						Year to Date September 30
	2019			2018			2019			2018
Current income taxes	(millions)
Federal	$	(31.2	)	$	(30.3	)	$	(10.6	)	$	(21.5	)
State	(0.8		)	1.5			(1.6		)	1.9
Total	(32.0		)	(28.8		)	(12.2		)	(19.6		)
Deferred income taxes
Federal	75.5			70.6			78.0			86.0
State	23.0			23.3			36.5			(35.7		)
Total	98.5			93.9			114.5			50.3
Investment tax credit amortization	(1.0		)	(1.0		)	(3.1		)	(2.4		)
Income tax expense	$	65.5		$	64.1		$	99.2		$	28.3



Evergy Kansas Central
	Three Months Ended September 30						Year to Date September 30
	2019			2018			2019			2018
Current income taxes	(millions)
Federal	$	11.2		$	8.0		$	39.1		$	18.9
State	(1.2		)	(9.2		)	(2.4		)	(6.7		)
Total	10.0			(1.2		)	36.7			12.2
Deferred income taxes
Federal	4.6			12.3			(9.3		)	15.4
State	12.0			12.0			21.1			(47.6		)
Total	16.6			24.3			11.8			(32.2		)
Investment tax credit amortization	(0.8		)	(0.7		)	(2.3		)	(2.0		)
Income tax expense (benefit)	$	25.8		$	22.4		$	46.2		$	(22.0	)



Evergy Metro^(a)
	Three Months Ended September 30						Year to Date September 30
	2019			2018			2019			2018
Current income taxes	(millions)
Federal	$	(2.2	)	$	20.7		$	32.1		$	43.5
State	3.9			6.8			9.3			11.6
Total	1.7			27.5			41.4			55.1
Deferred income taxes
Federal	26.3			(1.9		)	1.4			(23.4		)
State	4.5			2.7			1.9			49.4
Total	30.8			0.8			3.3			26.0
Investment tax credit amortization	(0.3		)	(0.3		)	(0.8		)	(0.8		)
Income tax expense	$	32.2		$	28.0		$	43.9		$	80.3

^(a)Evergy Metro amounts are included in consolidated Evergy from June 4, 2018, the date of the closing of the merger, and thereafter.

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
	Three Months Ended September 30				Year to Date September 30
	2019		2018		2019		2018
Federal statutory income tax rate	21.0	%	21.0	%	21.0	%	21.0	%
Effect of:
COLI policies	(1.6	)	(2.4	)	(1.7	)	(2.4	)
State income taxes	4.0		4.6		3.9		4.7
Flow through depreciation for plant-related differences	(3.1	)	(1.5	)	(3.2	)	(1.6	)
Federal tax credits	(3.9	)	(7.5	)	(3.9	)	(7.5	)
Non-controlling interest	(0.4	)	(0.4	)	(0.4	)	(0.4	)
AFUDC equity	—		(0.1	)	—		(0.1	)
Amortization of federal investment tax credits	(0.5	)	(0.6	)	(0.5	)	(0.6	)
Changes in uncertain tax positions, net	(0.4	)	—		(0.3	)	—
State tax rate change	—		0.1		—		(9.5	)
Valuation allowance	—		—		(1.1	)	0.4
Stock compensation	0.3		—		0.2		(0.5	)
Officer compensation limitation	0.1		1.2		0.1		1.2
Other	(0.5	)	0.8		(0.3	)	0.4
Effective income tax rate	15.0	%	15.2	%	13.8	%	5.1	%

Evergy's state tax rate change for year to date September 30, 2018, is due to the revaluation of Evergy Kansas Central's state deferred income tax assets and liabilities based on the Evergy composite tax rate as a result of the merger.



Evergy Kansas Central
	Three Months Ended September 30				Year to Date September 30
	2019		2018		2019		2018
Federal statutory income tax rate	21.0	%	21.0	%	21.0	%	21.0	%
Effect of:
COLI policies	(2.8	)	(4.0	)	(3.0	)	(4.0	)
State income taxes	4.4		1.1		4.2		3.3
Flow through depreciation for plant-related differences	0.8		1.5		0.5		0.3
Federal tax credits	(6.2	)	(11.8	)	(6.1	)	(11.7	)
Non-controlling interest	(0.8	)	(0.6	)	(0.8	)	(0.7	)
AFUDC equity	(0.1	)	(0.1	)	(0.1	)	(0.1	)
Amortization of federal investment tax credits	(0.7	)	(0.8	)	(0.7	)	(0.8	)
Changes in uncertain tax positions, net	(0.9	)	0.1		(0.5	)	0.1
State tax rate change	—		—		—		(17.7	)
Valuation allowance	—		—		(0.5	)	0.6
Stock compensation	—		—		(0.1	)	(0.9	)
Officer compensation limitation	—		1.9		—		1.9
Other	(1.4	)	2.9		(0.7	)	1.3
Effective income tax rate	13.3	%	11.2	%	13.2	%	(7.4	)%

Evergy Kansas Central's state tax rate change for year to date September 30, 2018, is due to the revaluation of Evergy Kansas Central's state deferred income tax assets and liabilities based on the Evergy composite tax rate as a result of the merger.



Evergy Metro
	Three Months Ended September 30				Year to Date September 30
	2019		2018		2019		2018
Federal statutory income tax rate	21.0	%	21.0	%	21.0	%	21.0	%
Effect of:
COLI policies	(0.1	)	(0.2	)	(0.1	)	(0.2	)
State income taxes	3.6		5.0		3.2		5.1
Flow through depreciation for plant-related differences	(6.1	)	(4.9	)	(6.1	)	(4.9	)
Federal tax credits	(1.3	)	(1.9	)	(1.4	)	(1.8	)
AFUDC equity	—		—		—		(0.1	)
Amortization of federal investment tax credits	(0.3	)	(0.4	)	(0.3	)	(0.4	)
State tax rate change	—		—		—		14.5
Officer compensation limitation	0.3		0.7		0.3		0.5
Other	0.4		(0.4	)	(0.4	)	(1.0	)
Effective income tax rate	17.5	%	18.9	%	16.2	%	32.7	%

Evergy Metro's state tax rate change for year to date September 30, 2018, is due to the revaluation of Evergy Metro's state deferred income tax assets and liabilities based on the Evergy composite tax rate as a result of the merger, partially offset by a revaluation of Evergy Metro's state deferred income tax assets and liabilities as a result of the enactment of Missouri state income tax reform in June 2018.

LEASES

9 Months Ended

Sep. 30, 2019

Leases [Abstract]

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 several agreements to purchase energy through renewable purchase power agreements accounted for as leases that commenced prior to the application of Topic 842. 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 20 years, 1 to 20 years and 2 to 27 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.



Three Months Ended September 30, 2019	Evergy		Evergy Kansas Central		Evergy Metro
Finance lease costs	(millions)
Amortization of right-of-use assets	$	2.3	$	2.4	$	—
Interest on lease liabilities	1.0		0.9		—
Operating lease costs	4.8		2.0		2.4
Short-term lease costs	0.8		0.3		0.5
Variable lease costs for renewable purchase power agreements	71.3		30.3		29.0
Total lease costs	$	80.2	$	35.9	$	31.9

Year to Date September 30, 2019	Evergy		Evergy Kansas Central		Evergy Metro
Finance lease costs	(millions)
Amortization of right-of-use assets	$	4.0	$	3.9	$	0.1
Interest on lease liabilities	2.3		2.1		0.1
Operating lease costs	17.9		9.9		6.9
Short-term lease costs	2.3		0.6		1.6
Variable lease costs for renewable purchase power agreements	222.1		94.3		91.0
Total lease costs	$	248.6	$	110.8	$	99.7

Supplemental cash flow information related to the Evergy Companies' leases is detailed in the following table.



Year to Date September 30, 2019	Evergy		Evergy Kansas Central		Evergy Metro
Cash paid for amounts included in the measurement of lease liabilities:	(millions)
Operating cash flows from operating leases	$	17.4	$	10.2	$	7.2
Operating cash flows from finance leases	2.0		1.9		0.1
Financing cash flows from finance leases	3.3		3.2		0.1
Right-of-use assets obtained in exchange for new operating lease liabilities	3.0		0.6		2.4
Right-of-use assets obtained in exchange for new finance lease liabilities	2.3		2.3		—

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 for finance leases as of September 30, 2019, are detailed in the following table.



	Evergy			Evergy Kansas Central			Evergy Metro
	(millions)
October 2019 through December 2019	$	1.8		$	1.7		$	0.1
2020	7.0			6.6			0.2
2021	6.5			6.0			0.2
2022	5.7			5.2			0.2
2023	4.8			4.4			0.2
After 2023	48.4			46.4			1.0
Total finance lease payments	74.2			70.3			1.9
Amounts representing imputed interest	(25.9		)	(24.8		)	(0.5		)
Present value of lease payments	48.3			45.5			1.4
Less: current portion	(4.8		)	(4.6		)	(0.1		)
Total long-term obligations under finance leases	$	43.5		$	40.9		$	1.3

Weighted-average remaining lease term (years)	15.3			15.7			8.9
Weighted-average discount rate	5.8		%	5.7		%	7.6		%

Estimated future commitments under finance leases as of December 31, 2018, are detailed in the following table.



	Evergy			Evergy Kansas Central			Evergy Metro
	(millions)
2019	$	6.4		$	6.0		$	0.2
2020	5.8			5.4			0.2
2021	5.3			4.9			0.2
2022	4.7			4.3			0.2
2023	4.0			3.6			0.2
After 2023	48.6			46.4			1.1
Total finance lease payments	74.8			70.6			2.1
Amounts representing imputed interest	(25.8		)	(24.6		)	(0.6		)
Present value of net minimum lease payments under finance leases	49.0			46.0			1.5
Less: current portion	(3.9		)	(3.7		)	(0.1		)
Total long-term obligations under finance leases	$	45.1		$	42.3		$	1.4

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 for operating leases as of September 30, 2019, are detailed in the following table.



	Evergy			Evergy Kansas Central			Evergy Metro
	(millions)
October 2019 through December 2019	$	5.0		$	2.8		$	2.7
2020	18.9			10.3			10.7
2021	15.4			7.4			10.1
2022	12.4			5.2			9.3
2023	9.4			2.7			8.8
After 2023	52.5			2.8			91.3
Total operating lease payments	113.6			31.2			132.9
Amounts representing imputed interest	(18.9		)	(2.1		)	(36.5		)
Present value of lease payments	94.7			29.1			96.4
Less: current portion	(15.2		)	(9.2		)	(6.8		)
Total long-term obligations under operating leases	$	79.5		$	19.9		$	89.6

Weighted-average remaining lease term (years)	9.1			3.7			15.9
Weighted-average discount rate	3.9		%	3.4		%	4.2		%

Estimated future commitments under operating leases as of December 31, 2018, are detailed in the following table.



	Evergy		Evergy Kansas Central		Evergy Metro
	(millions)
2019	$	24.2	$	14.0	$	10.2
2020	20.7		10.1		10.6
2021	18.4		8.1		10.3
2022	15.2		5.2		10.0
2023	12.4		2.8		9.6
After 2023	95.0		3.1		91.8
Total operating lease payments	$	185.9	$	43.3	$	142.5

LEASES

The Evergy Companies’ lease expense is detailed in the following table.



Three Months Ended September 30, 2019	Evergy		Evergy Kansas Central		Evergy Metro
Finance lease costs	(millions)
Amortization of right-of-use assets	$	2.3	$	2.4	$	—
Interest on lease liabilities	1.0		0.9		—
Operating lease costs	4.8		2.0		2.4
Short-term lease costs	0.8		0.3		0.5
Variable lease costs for renewable purchase power agreements	71.3		30.3		29.0
Total lease costs	$	80.2	$	35.9	$	31.9

Year to Date September 30, 2019	Evergy		Evergy Kansas Central		Evergy Metro
Finance lease costs	(millions)
Amortization of right-of-use assets	$	4.0	$	3.9	$	0.1
Interest on lease liabilities	2.3		2.1		0.1
Operating lease costs	17.9		9.9		6.9
Short-term lease costs	2.3		0.6		1.6
Variable lease costs for renewable purchase power agreements	222.1		94.3		91.0
Total lease costs	$	248.6	$	110.8	$	99.7

Supplemental cash flow information related to the Evergy Companies' leases is detailed in the following table.



Year to Date September 30, 2019	Evergy		Evergy Kansas Central		Evergy Metro
Cash paid for amounts included in the measurement of lease liabilities:	(millions)
Operating cash flows from operating leases	$	17.4	$	10.2	$	7.2
Operating cash flows from finance leases	2.0		1.9		0.1
Financing cash flows from finance leases	3.3		3.2		0.1
Right-of-use assets obtained in exchange for new operating lease liabilities	3.0		0.6		2.4
Right-of-use assets obtained in exchange for new finance lease liabilities	2.3		2.3		—

Finance Leases



	Evergy			Evergy Kansas Central			Evergy Metro
	(millions)
October 2019 through December 2019	$	1.8		$	1.7		$	0.1
2020	7.0			6.6			0.2
2021	6.5			6.0			0.2
2022	5.7			5.2			0.2
2023	4.8			4.4			0.2
After 2023	48.4			46.4			1.0
Total finance lease payments	74.2			70.3			1.9
Amounts representing imputed interest	(25.9		)	(24.8		)	(0.5		)
Present value of lease payments	48.3			45.5			1.4
Less: current portion	(4.8		)	(4.6		)	(0.1		)
Total long-term obligations under finance leases	$	43.5		$	40.9		$	1.3

Weighted-average remaining lease term (years)	15.3			15.7			8.9
Weighted-average discount rate	5.8		%	5.7		%	7.6		%

Estimated future commitments under finance leases as of December 31, 2018, are detailed in the following table.



	Evergy			Evergy Kansas Central			Evergy Metro
	(millions)
2019	$	6.4		$	6.0		$	0.2
2020	5.8			5.4			0.2
2021	5.3			4.9			0.2
2022	4.7			4.3			0.2
2023	4.0			3.6			0.2
After 2023	48.6			46.4			1.1
Total finance lease payments	74.8			70.6			2.1
Amounts representing imputed interest	(25.8		)	(24.6		)	(0.6		)
Present value of net minimum lease payments under finance leases	49.0			46.0			1.5
Less: current portion	(3.9		)	(3.7		)	(0.1		)
Total long-term obligations under finance leases	$	45.1		$	42.3		$	1.4

Operating Leases



	Evergy			Evergy Kansas Central			Evergy Metro
	(millions)
October 2019 through December 2019	$	5.0		$	2.8		$	2.7
2020	18.9			10.3			10.7
2021	15.4			7.4			10.1
2022	12.4			5.2			9.3
2023	9.4			2.7			8.8
After 2023	52.5			2.8			91.3
Total operating lease payments	113.6			31.2			132.9
Amounts representing imputed interest	(18.9		)	(2.1		)	(36.5		)
Present value of lease payments	94.7			29.1			96.4
Less: current portion	(15.2		)	(9.2		)	(6.8		)
Total long-term obligations under operating leases	$	79.5		$	19.9		$	89.6

Weighted-average remaining lease term (years)	9.1			3.7			15.9
Weighted-average discount rate	3.9		%	3.4		%	4.2		%

Estimated future commitments under operating leases as of December 31, 2018, are detailed in the following table.



	Evergy		Evergy Kansas Central		Evergy Metro
	(millions)
2019	$	24.2	$	14.0	$	10.2
2020	20.7		10.1		10.6
2021	18.4		8.1		10.3
2022	15.2		5.2		10.0
2023	12.4		2.8		9.6
After 2023	95.0		3.1		91.8
Total operating lease payments	$	185.9	$	43.3	$	142.5

ORGANIZATION AND BASIS OF PRESENTATION (Policies)	9 Months Ended
ORGANIZATION AND BASIS OF PRESENTATION (Policies)	Sep. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation These unaudited consolidated financial statements have been prepared in accordance with generally accepted accounting principles (GAAP) for interim financial information and with the instructions to Form 10-Q and Regulation S-X. Accordingly, these unaudited consolidated financial statements do not include all of the information and notes required by GAAP for annual financial statements and should be read in conjunction with the consolidated financial statements in the Evergy Companies' combined 2018 Form 10-K. These unaudited consolidated financial statements, in the opinion of management, reflect all normal recurring adjustments necessary to fairly present the unaudited consolidated financial statements for each of the Evergy Companies for these interim periods. In preparing financial statements that conform to GAAP, management must make estimates and assumptions that affect the reported amounts of assets and liabilities, the reported amounts of revenues and expenses, and the disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates.
Principles of Consolidation	Principles of Consolidation Evergy Kansas Central was determined to be the accounting acquirer in the merger and thus, the predecessor of Evergy. Evergy had separate operations for the period beginning with the quarter ended June 30, 2018, and references to amounts for periods after the closing of the merger relate to Evergy. The results of Great Plains Energy's direct subsidiaries have been included in Evergy's results of operations from June 4, 2018, the date of the closing of the merger, and thereafter. Each of Evergy's, Evergy Kansas Central's and Evergy Metro's unaudited 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).
Fuel Inventory and Supplies	The Evergy Companies record fuel inventory and supplies at average cost.
Earnings Per Share	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), performance shares and restricted stock. Evergy computes the dilutive effects of potential issuances of common shares using the treasury stock method.
New Accounting Standards	New Accounting Standards Intangibles - Internal-Use Software In August 2018, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2018-15, Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract, which aligns the requirements for recording implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. An entity in a hosting arrangement that is a service contract will need to determine to which project stage (that is, preliminary project stage, application development stage or post-implementation stage) an implementation activity relates. Costs for implementation activities in the application development stage are recorded as a prepaid asset depending on the nature of the costs, while costs incurred during the preliminary project and post-implementation stages are expensed as the activities occur. Costs that are recorded to a prepaid asset are to be expensed over the term of the hosting arrangement. The new guidance is effective for annual periods beginning after December 15, 2019, and interim periods within those fiscal years. The new guidance can be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. Early adoption is permitted. The Evergy Companies early adopted ASU No. 2018-15 prospectively as of January 1, 2019. The adoption of ASU No. 2018-15 did not have a material impact on the Evergy Companies. Leases In February 2016, the FASB issued ASU No. 2016-02, Leases, which requires an entity that is a lessee to record a right-of-use asset and a lease liability for lease payments on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. Lessor accounting remains largely unchanged. In January 2018, the FASB issued ASU No. 2018-01, Leases: Land Easement Practical Expedient for Transition to Topic 842, which permits entities to elect an optional transition practical expedient to not evaluate, under Topic 842, land easements that exist or expired before the entity's adoption of Topic 842 and that were not previously accounted for as leases under Topic 840. In July 2018, the FASB issued ASU No. 2018-10, Codification Improvements to Topic 842, Leases, which updates narrow aspects of the guidance issued in ASU No. 2016-02. Also in July 2018, the FASB issued ASU No. 2018-11, Leases: Targeted Improvements, which provides an optional transition method that allows entities to initially apply Topic 842 at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption without restating prior periods. In December 2018, the FASB issued ASU No. 2018-20, Leases: Narrow-Scope Improvements for Lessors, which is expected to reduce a lessor's implementation and ongoing costs associated with applying ASU No. 2016-02. In March 2019, the FASB issued ASU No. 2019-01, Leases: Codification Improvements, which clarifies certain lessor accounting and interim reporting requirements. ASU No. 2016-02 and the subsequent amendments are effective for interim and annual periods beginning after December 15, 2018, with early adoption permitted, and requires a modified retrospective transition approach with an option to either adjust or not adjust comparative periods. The Evergy Companies adopted the new guidance on January 1, 2019, without adjusting comparative periods for all leases existing as of January 1, 2019, by electing the optional transition method permitted by ASU No. 2018-11. As a result, Evergy, Evergy Kansas Central and Evergy Metro recorded an increase to assets and liabilities of approximately $110 million, $40 million and $80 million, respectively, as of January 1, 2019. Evergy Kansas Central and Evergy Metro have certain lease transactions between them for which the related assets and liabilities are eliminated at consolidated Evergy. The adoption of Topic 842 did not have a material impact on the Evergy Companies' consolidated statements of income and comprehensive income and there was no cumulative-effect adjustment recorded to the opening balance of retained earnings. The Evergy Companies also elected a practical expedient to forgo reassessing existing or expired contracts as leases to determine whether each is in scope of Topic 842 and to forgo reassessing lease classification for existing and expired leases.

ORGANIZATION AND BASIS OF PRESENTATION (Tables)

9 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

Schedule of Fuel Inventory and Supplies

The following table separately states the balances for fuel inventory and supplies.



	September 30			December 31
		2019			2018
Evergy		(millions)
Fuel inventory		$	118.5		$	168.9
Supplies		335.9			342.1
Fuel inventory and supplies		$	454.4		$	511.0
Evergy Kansas Central
Fuel inventory		$	64.8		$	87.8
Supplies		182.9			189.0
Fuel inventory and supplies		$	247.7		$	276.8
Evergy Metro
Fuel inventory		$	37.1		$	57.8
Supplies		120.1			119.8
Fuel inventory and supplies		$	157.2		$	177.6

Summary of Property, Plant and Equipment

The following tables summarize the property, plant and equipment of Evergy, Evergy Kansas Central and Evergy Metro.



September 30, 2019	Evergy			Evergy Kansas Central			Evergy Metro
	(millions)
Electric plant in service	$	27,492.5		$	13,414.4		$	10,673.6
Electric plant acquisition adjustment	740.6			740.6			—
Accumulated depreciation	(10,136.6		)	(4,872.5		)	(4,208.5		)
Plant in service, net	18,096.5			9,282.5			6,465.1
Construction work in progress	747.2			404.9			244.4
Nuclear fuel, net	131.4			65.3			66.1
Plant to be retired, net^(a)	1.0			1.0			—
Property, plant and equipment, net	$	18,976.1		$	9,753.7		$	6,775.6

December 31, 2018	Evergy			Evergy Kansas Central			Evergy Metro
	(millions)
Electric plant in service	$	26,916.7		$	13,176.7		$	10,439.1
Electric plant acquisition adjustment	740.6			740.6			—
Accumulated depreciation	(9,694.1		)	(4,642.8		)	(4,022.4		)
Plant in service, net	17,963.2			9,274.5			6,416.7
Construction work in progress	685.2			376.7			204.4
Nuclear fuel, net	133.1			66.1			67.0
Plant to be retired, net^(a)	1.0			1.0			—
Property, plant and equipment, net	$	18,782.5		$	9,718.3		$	6,688.1

^(a) As of September 30, 2019, and December 31, 2018, represents the planned retirement of Evergy Kansas Central analog meters prior to the end of their remaining useful lives.

Schedule of Other Nonoperating Income (Expense)

The table below shows the detail of other expense for each of the Evergy Companies.



	Three Months Ended September 30						Year to Date September 30
	2019			2018			2019			2018
Evergy	(millions)
Non-service cost component of net benefit cost	$	(13.7	)	$	(17.6	)	$	(40.9	)	$	(32.8	)
Other	(6.0		)	(13.2		)	(16.3		)	(22.4		)
Other expense	$	(19.7	)	$	(30.8	)	$	(57.2	)	$	(55.2	)
Evergy Kansas Central
Non-service cost component of net benefit cost	$	(4.9	)	$	(7.2	)	$	(14.5	)	$	(19.0	)
Other	(5.9		)	(8.0		)	(15.4		)	(17.1		)
Other expense	$	(10.8	)	$	(15.2	)	$	(29.9	)	$	(36.1	)
Evergy Metro^(a)
Non-service cost component of net benefit cost	$	(5.0	)	$	(6.7	)	$	(15.3	)	$	(19.7	)
Other	0.1			(2.3		)	(0.4		)	(3.2		)
Other expense	$	(4.9	)	$	(9.0	)	$	(15.7	)	$	(22.9	)

^(a)Evergy Metro amounts are included in consolidated Evergy from June 4, 2018, the date of the closing of the merger, and thereafter.

Schedule of Earnings Per Share, Basic and Diluted

The following table reconciles Evergy's basic and diluted EPS.



	Three Months Ended September 30				Year to Date September 30
	2019		2018		2019		2018
Income	(millions, except per share amounts)
Net income	$	370.9	$	357.6	$	618.9	$	524.9
Less: net income attributable to noncontrolling interests	4.1		2.6		12.9		7.6
Net income attributable to Evergy, Inc.	$	366.8	$	355.0	$	606.0	$	517.3
Common Shares Outstanding
Weighted average number of common shares outstanding - basic	234.6		268.6		243.5		197.9
Add: effect of dilutive securities	0.4		0.2		0.3		0.1
Weighted average number of common shares outstanding - dilutive	235.0		268.8		243.8		198.0
Basic and Diluted EPS	$	1.56	$	1.32	$	2.49	$	2.61

Supplemental Cash Flow Information



Year to Date September 30	2019			2018
Evergy	(millions)
Cash paid for (received from):
Interest, net of amounts capitalized	$	240.8		$	148.7
Interest of VIEs	1.6			2.3
Income taxes, net of refunds	(13.1		)	0.6
Non-cash investing transactions:
Property, plant and equipment additions (reductions)	99.4			(24.8		)
Non-cash financing transactions:
Issuance of stock for compensation and reinvested dividends	(0.3		)	0.4
Evergy Kansas Central
Cash paid for (received from):
Interest, net of amounts capitalized	$	109.4		$	110.5
Interest of VIEs	1.6			2.3
Income taxes, net of refunds	1.8			—
Non-cash investing transactions:
Property, plant and equipment additions (reductions)	35.3			(42.0		)
Evergy Metro^(a)
Cash paid for (received from):
Interest, net of amounts capitalized	$	83.5		$	87.6
Income taxes, net of refunds	32.8			28.4
Non-cash investing transactions:
Property, plant and equipment additions	60.8			15.2

^(a)Evergy Metro amounts are included in consolidated Evergy from June 4, 2018, the date of the closing of the merger, and thereafter.

PENSION PLANS AND POST-RETIREMENT BENEFITS (Tables)

9 Months Ended

Sep. 30, 2019

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs

The following tables provide the components of net periodic benefit costs prior to the effects of capitalization and sharing with joint owners of power plants.



	Pension Benefits									Post-Retirement Benefits
Three Months Ended September 30, 2019	Evergy			Evergy Kansas Central			Evergy Metro			Evergy			Evergy Kansas Central			Evergy Metro
Components of net periodic benefit costs	(millions)
Service cost	$	19.1		$	7.3		$	11.8		$	0.6		$	0.2		$	0.4
Interest cost	27.5			13.4			14.1			2.6			1.4			1.2
Expected return on plan assets	(27.0		)	(13.7		)	(12.3		)	(2.5		)	(1.7		)	(0.8		)
Prior service cost	0.5			0.5			0.2			0.1			0.1			—
Recognized net actuarial (gain)/loss	6.9			6.2			12.2			(0.3		)	(0.1		)	(0.3		)
Settlement and special termination benefits	14.5			—			20.8			—			—			—
Net periodic benefit costs before regulatory adjustment and intercompany allocations	41.5			13.7			46.8			0.5			(0.1		)	0.5
Regulatory adjustment	4.9			0.5			(14.7		)	(0.8		)	(0.7		)	0.1
Intercompany allocations	—			—			(13.6		)	—			—			(0.2		)
Net periodic benefit costs (income)	$	46.4		$	14.2		$	18.5		$	(0.3	)	$	(0.8	)	$	0.4

	Pension Benefits									Post-Retirement Benefits
Year to Date September 30, 2019	Evergy			Evergy Kansas Central			Evergy Metro			Evergy			Evergy Kansas Central			Evergy Metro
Components of net periodic benefit costs	(millions)
Service cost	$	57.3		$	21.8		$	35.5		$	1.9		$	0.8		$	1.1
Interest cost	82.4			40.3			42.1			7.9			4.2			3.7
Expected return on plan assets	(80.9		)	(41.1		)	(36.9		)	(7.5		)	(5.0		)	(2.5		)
Prior service cost	1.5			1.3			0.7			0.3			0.3			—
Recognized net actuarial (gain)/loss	20.6			19.0			36.7			(0.9		)	(0.4		)	(1.1		)
Settlement and special termination benefits	14.5			—			20.8			—			—			—
Net periodic benefit costs before regulatory adjustment and intercompany allocations	95.4			41.3			98.9			1.7			(0.1		)	1.2
Regulatory adjustment	30.4			1.5			(15.9		)	(2.5		)	(2.2		)	0.3
Intercompany allocations	—			—			(27.6		)	—			—			(0.3		)
Net periodic benefit costs (income)	$	125.8		$	42.8		$	55.4		$	(0.8	)	$	(2.3	)	$	1.2



	Pension Benefits									Post-Retirement Benefits
Three Months Ended September 30, 2018	Evergy			Evergy Kansas Central			Evergy Metro			Evergy			Evergy Kansas Central			Evergy Metro
Components of net periodic benefit costs	(millions)
Service cost	$	20.2		$	8.0		$	12.2		$	0.7		$	0.4		$	0.5
Interest cost	26.3			12.7			12.0			2.5			1.2			1.2
Expected return on plan assets	(27.0		)	(13.9		)	(13.9		)	(2.5		)	(1.8		)	(0.7		)
Prior service cost	0.3			0.2			0.2			0.1			0.1			—
Recognized net actuarial (gain)/loss	8.1			8.1			10.9			(0.1		)	(0.1		)	—
Net periodic benefit costs before regulatory adjustment and intercompany allocations	27.9			15.1			21.4			0.7			(0.2		)	1.0
Regulatory adjustment	2.6			2.8			0.7			(0.4		)	(0.4		)	0.1
Intercompany allocations	—			—			(4.9		)	—			—			(0.2		)
Net periodic benefit costs (income)	$	30.5		$	17.9		$	17.2		$	0.3		$	(0.6	)	$	0.9

	Pension Benefits									Post-Retirement Benefits
Year to Date September 30, 2018	Evergy			Evergy Kansas Central			Evergy Metro^(a)			Evergy			Evergy Kansas Central			Evergy Metro^(a)
Components of net periodic benefit costs	(millions)
Service cost	$	40.4		$	24.1		$	36.5		$	1.5		$	1.0		$	1.5
Interest cost	56.2			38.1			37.4			5.4			3.7			3.6
Expected return on plan assets	(59.3		)	(41.9		)	(41.6		)	(6.2		)	(5.2		)	(2.1		)
Prior service cost	0.6			0.5			0.5			0.3			0.3			—
Recognized net actuarial (gain)/loss	24.4			24.4			33.8			(0.4		)	(0.4		)	(0.1		)
Net periodic benefit costs before regulatory adjustment and intercompany allocations	62.3			45.2			66.6			0.6			(0.6		)	2.9
Regulatory adjustment	8.4			8.4			2.1			(1.3		)	(1.3		)	(0.2		)
Intercompany allocations	—			—			(17.1		)	—			—			(0.8		)
Net periodic benefit costs (income)	$	70.7		$	53.6		$	51.6		$	(0.7	)	$	(1.9	)	$	1.9

^(a)Evergy Metro amounts are included in consolidated Evergy from June 4, 2018, the date of the closing of the merger, and thereafter.

FAIR VALUE MEASUREMENTS (Tables)

9 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

Carrying Value and Fair Value of Debt Instruments



	September 30, 2019				December 31, 2018
	Book Value		Fair Value		Book Value		Fair Value
Long-term debt^(a)	(millions)
Evergy^(b)	$	9,000.3	$	9,843.1	$	7,341.7	$	7,412.1
Evergy Kansas Central	3,685.6		4,139.0		3,689.8		3,771.3
Evergy Metro	2,524.6		2,962.7		2,530.1		2,637.5
Long-term debt of variable interest entities^(a)
Evergy	$	51.1	$	51.3	$	81.4	$	81.3
Evergy Kansas Central	51.1		51.3		81.4		81.3

^(a)Includes current maturities.

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	September 30, 2019			Level 1		Level 2			Level 3			NAV
Evergy Kansas Central		(millions)
Assets
Nuclear decommissioning trust^(a)
Domestic equity funds		$	84.0	$	77.5		$	—		$	—		$	6.5
International equity funds		46.7		46.7			—			—			—
Core bond fund		36.6		36.6			—			—			—
High-yield bond fund		21.3		21.3			—			—			—
Emerging markets bond fund		17.2		17.2			—			—			—
Combination debt/equity/other fund		15.4		15.4			—			—			—
Alternative investments fund		24.8		—			—			—			24.8
Real estate securities fund		12.4		—			—			—			12.4
Cash equivalents		0.1		0.1			—			—			—
Total nuclear decommissioning trust		258.5		214.8			—			—			43.7
Rabbi trust
Core bond fund		25.5		—			—			—			25.5
Combination debt/equity/other fund		6.1		—			—			—			6.1
Cash equivalents		0.2		0.2			—			—			—
Total rabbi trust		31.8		0.2			—			—			31.6
Total		$	290.3	$	215.0		$	—		$	—		$	75.3
Evergy Metro
Assets
Nuclear decommissioning trust^(a)
Equity securities		$	193.7	$	193.7		$	—		$	—		$	—
Debt securities
U.S. Treasury		50.1		50.1			—			—			—
U.S. Agency		0.4		—			0.4			—			—
State and local obligations		2.2		—			2.2			—			—
Corporate bonds		33.0		—			33.0			—			—
Foreign governments		0.1		—			0.1			—			—
Cash equivalents		2.6		2.6			—			—			—
Other		0.4		—			0.4			—			—
Total nuclear decommissioning trust		282.5		246.4			36.1			—			—
Self-insured health plan trust^(b)
Equity securities		0.5		0.5			—			—			—
Debt securities		6.1		1.3			4.8			—			—
Cash and cash equivalents		3.7		3.7			—			—			—
Total self-insured health plan trust		10.3		5.5			4.8			—			—
Total		$	292.8	$	251.9		$	40.9		$	—		$	—
Other Evergy
Assets
Rabbi trusts
Fixed income fund		$	13.3	$	—		$	—		$	—		$	13.3
Cash and cash equivalents		0.5		0.5			—			—			—
Total rabbi trusts		$	13.8	$	0.5		$	—		$	—		$	13.3
Evergy
Assets
Nuclear decommissioning trust^(a)		$	541.0	$	461.2		$	36.1		$	—		$	43.7
Rabbi trusts		45.6		0.7			—			—			44.9
Self-insured health plan trust^(b)		10.3		5.5			4.8			—			—
Total		$	596.9	$	467.4		$	40.9		$	—		$	88.6



Description	December 31, 2018			Level 1			Level 2			Level 3			NAV
Evergy Kansas Central		(millions)
Assets
Nuclear decommissioning trust^(a)
Domestic equity funds		$	70.6		$	63.9		$	—		$	—		$	6.7
International equity funds		36.2			36.2			—			—			—
Core bond fund		37.5			37.5			—			—			—
High-yield bond fund		18.9			18.9			—			—			—
Emerging markets bond fund		15.4			15.4			—			—			—
Combination debt/equity/other fund		12.9			12.9			—			—			—
Alternative investments fund		24.1			—			—			—			24.1
Real estate securities fund		11.8			—			—			—			11.8
Cash equivalents		0.1			0.1			—			—			—
Total nuclear decommissioning trust		227.5			184.9			—			—			42.6
Rabbi trust
Core bond fund		24.8			—			—			—			24.8
Combination debt/equity/other fund		5.6			—			—			—			5.6
Cash equivalents		0.2			0.2			—			—			—
Total rabbi trust		30.6			0.2			—			—			30.4
Total		$	258.1		$	185.1		$	—		$	—		$	73.0
Evergy Metro
Assets
Nuclear decommissioning trust^(a)
Equity securities		$	166.6		$	166.6		$	—		$	—		$	—
Debt securities
U.S. Treasury		42.1			42.1			—			—			—
U.S. Agency		0.4			—			0.4			—			—
State and local obligations		2.1			—			2.1			—			—
Corporate bonds		30.9			—			30.9			—			—
Foreign governments		0.1			—			0.1			—			—
Cash equivalents		1.7			1.7			—			—			—
Other		0.7			0.7			—			—			—
Total nuclear decommissioning trust		244.6			211.1			33.5			—			—
Self-insured health plan trust^(b)
Equity securities		0.5			0.5			—			—			—
Debt securities		3.9			0.3			3.6			—			—
Cash and cash equivalents		8.0			8.0			—			—			—
Total self-insured health plan trust		12.4			8.8			3.6			—			—
Total		$	257.0		$	219.9		$	37.1		$	—		$	—
Other Evergy
Assets
Rabbi trusts
Fixed income fund		$	13.2		$	—		$	—		$	—		$	13.2
Total rabbi trusts		$	13.2		$	—		$	—		$	—		$	13.2
Liabilities
Interest rate swaps^(c)		$	5.4		$	—		$	5.4		$	—		$	—
Total		$	5.4		$	—		$	5.4		$	—		$	—
Evergy
Assets
Nuclear decommissioning trust^(a)		$	472.1		$	396.0		$	33.5		$	—		$	42.6
Rabbi trust		43.8			0.2			—			—			43.6
Self-insured health plan trust^(b)		12.4			8.8			3.6			—			—
Total		$	528.3		$	405.0		$	37.1		$	—		$	86.2
Liabilities
Interest rate swaps^(c)		$	5.4		$	—		$	5.4		$	—		$	—
Total		$	5.4		$	—		$	5.4		$	—		$	—


^(a)	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)

The fair value of interest rate swaps are determined by calculating the net present value of expected payments and receipts under the interest rate swaps using observable market inputs including interest rates and LIBOR swap rates.

Fair Value Investments, Entities that Calculate NAV

The following table provides additional information on these Evergy and Evergy Kansas Central investments.



	September 30, 2019				December 31, 2018				September 30, 2019
	Fair		Unfunded		Fair		Unfunded		Redemption	Length of
	Value		Commitments		Value		Commitments		Frequency	Settlement
Evergy Kansas Central	(millions)
Nuclear decommissioning trust:
Domestic equity funds	$	6.5	$	3.6	$	6.7	$	4.3	(a)	(a)
Alternative investments fund^(b)	24.8		—		24.1		—		Quarterly	65 days
Real estate securities fund^(b)	12.4		—		11.8		—		Quarterly	65 days
Total	$	43.7	$	3.6	$	42.6	$	4.3
Rabbi trust:
Core bond fund	$	25.5	$	—	$	24.8	$	—	(c)	(c)
Combination debt/equity/other fund	6.1		—		5.6		—		(c)	(c)
Total	$	31.6	$	—	$	30.4	$	—
Other Evergy
Rabbi trusts:
Fixed income fund	$	13.3	$	—	$	13.2	$	—	(c)	(c)
Total Evergy investments at NAV	$	88.6	$	3.6	$	86.2	$	4.3

^(a)


^(b)	There is a holdback on final redemptions.

^(c)

This investment can be redeemed immediately and is not subject to any restrictions on redemptions.

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.



	Three Months Ended September 30						Year to Date September 30
	2019			2018			2019		2018
Evergy Kansas Central	(millions)
Nuclear decommissioning trust - equity securities	$	0.2		$	6.5		$	26.2	$	(6.4	)
Rabbi trust - equity securities	0.5			3.7			2.7		3.2
Total	$	0.7		$	10.2		$	28.9	$	(3.2	)
Evergy Metro^(a)
Nuclear decommissioning trust - equity securities	$	(0.5	)	$	8.6		$	24.7	$	9.1
Nuclear decommissioning trust - debt securities	1.5			(0.5		)	5.9		(2.8		)
Total	$	1.0		$	8.1		$	30.6	$	6.3
Evergy
Nuclear decommissioning trust - equity securities	$	(0.3	)	$	15.1		$	50.9	$	1.1
Nuclear decommissioning trust - debt securities	1.5			(0.5		)	5.9		(0.8		)
Rabbi trusts - equity securities	0.9			3.7			2.4		3.1
Total	$	2.1		$	18.3		$	59.2	$	3.4

^(a)Evergy Metro amounts are included in consolidated Evergy from June 4, 2018, the date of the closing of the merger, and thereafter.

TAXES (Tables)

9 Months Ended

Sep. 30, 2019

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit)

Components of income tax expense are detailed in the following tables.



Evergy
	Three Months Ended September 30						Year to Date September 30
	2019			2018			2019			2018
Current income taxes	(millions)
Federal	$	(31.2	)	$	(30.3	)	$	(10.6	)	$	(21.5	)
State	(0.8		)	1.5			(1.6		)	1.9
Total	(32.0		)	(28.8		)	(12.2		)	(19.6		)
Deferred income taxes
Federal	75.5			70.6			78.0			86.0
State	23.0			23.3			36.5			(35.7		)
Total	98.5			93.9			114.5			50.3
Investment tax credit amortization	(1.0		)	(1.0		)	(3.1		)	(2.4		)
Income tax expense	$	65.5		$	64.1		$	99.2		$	28.3



Evergy Kansas Central
	Three Months Ended September 30						Year to Date September 30
	2019			2018			2019			2018
Current income taxes	(millions)
Federal	$	11.2		$	8.0		$	39.1		$	18.9
State	(1.2		)	(9.2		)	(2.4		)	(6.7		)
Total	10.0			(1.2		)	36.7			12.2
Deferred income taxes
Federal	4.6			12.3			(9.3		)	15.4
State	12.0			12.0			21.1			(47.6		)
Total	16.6			24.3			11.8			(32.2		)
Investment tax credit amortization	(0.8		)	(0.7		)	(2.3		)	(2.0		)
Income tax expense (benefit)	$	25.8		$	22.4		$	46.2		$	(22.0	)



Evergy Metro^(a)
	Three Months Ended September 30						Year to Date September 30
	2019			2018			2019			2018
Current income taxes	(millions)
Federal	$	(2.2	)	$	20.7		$	32.1		$	43.5
State	3.9			6.8			9.3			11.6
Total	1.7			27.5			41.4			55.1
Deferred income taxes
Federal	26.3			(1.9		)	1.4			(23.4		)
State	4.5			2.7			1.9			49.4
Total	30.8			0.8			3.3			26.0
Investment tax credit amortization	(0.3		)	(0.3		)	(0.8		)	(0.8		)
Income tax expense	$	32.2		$	28.0		$	43.9		$	80.3

^(a)Evergy Metro amounts are included in consolidated Evergy from June 4, 2018, the date of the closing of the merger, and thereafter.

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
	Three Months Ended September 30				Year to Date September 30
	2019		2018		2019		2018
Federal statutory income tax rate	21.0	%	21.0	%	21.0	%	21.0	%
Effect of:
COLI policies	(1.6	)	(2.4	)	(1.7	)	(2.4	)
State income taxes	4.0		4.6		3.9		4.7
Flow through depreciation for plant-related differences	(3.1	)	(1.5	)	(3.2	)	(1.6	)
Federal tax credits	(3.9	)	(7.5	)	(3.9	)	(7.5	)
Non-controlling interest	(0.4	)	(0.4	)	(0.4	)	(0.4	)
AFUDC equity	—		(0.1	)	—		(0.1	)
Amortization of federal investment tax credits	(0.5	)	(0.6	)	(0.5	)	(0.6	)
Changes in uncertain tax positions, net	(0.4	)	—		(0.3	)	—
State tax rate change	—		0.1		—		(9.5	)
Valuation allowance	—		—		(1.1	)	0.4
Stock compensation	0.3		—		0.2		(0.5	)
Officer compensation limitation	0.1		1.2		0.1		1.2
Other	(0.5	)	0.8		(0.3	)	0.4
Effective income tax rate	15.0	%	15.2	%	13.8	%	5.1	%



Evergy Kansas Central
	Three Months Ended September 30				Year to Date September 30
	2019		2018		2019		2018
Federal statutory income tax rate	21.0	%	21.0	%	21.0	%	21.0	%
Effect of:
COLI policies	(2.8	)	(4.0	)	(3.0	)	(4.0	)
State income taxes	4.4		1.1		4.2		3.3
Flow through depreciation for plant-related differences	0.8		1.5		0.5		0.3
Federal tax credits	(6.2	)	(11.8	)	(6.1	)	(11.7	)
Non-controlling interest	(0.8	)	(0.6	)	(0.8	)	(0.7	)
AFUDC equity	(0.1	)	(0.1	)	(0.1	)	(0.1	)
Amortization of federal investment tax credits	(0.7	)	(0.8	)	(0.7	)	(0.8	)
Changes in uncertain tax positions, net	(0.9	)	0.1		(0.5	)	0.1
State tax rate change	—		—		—		(17.7	)
Valuation allowance	—		—		(0.5	)	0.6
Stock compensation	—		—		(0.1	)	(0.9	)
Officer compensation limitation	—		1.9		—		1.9
Other	(1.4	)	2.9		(0.7	)	1.3
Effective income tax rate	13.3	%	11.2	%	13.2	%	(7.4	)%



Evergy Metro
	Three Months Ended September 30				Year to Date September 30
	2019		2018		2019		2018
Federal statutory income tax rate	21.0	%	21.0	%	21.0	%	21.0	%
Effect of:
COLI policies	(0.1	)	(0.2	)	(0.1	)	(0.2	)
State income taxes	3.6		5.0		3.2		5.1
Flow through depreciation for plant-related differences	(6.1	)	(4.9	)	(6.1	)	(4.9	)
Federal tax credits	(1.3	)	(1.9	)	(1.4	)	(1.8	)
AFUDC equity	—		—		—		(0.1	)
Amortization of federal investment tax credits	(0.3	)	(0.4	)	(0.3	)	(0.4	)
State tax rate change	—		—		—		14.5
Officer compensation limitation	0.3		0.7		0.3		0.5
Other	0.4		(0.4	)	(0.4	)	(1.0	)
Effective income tax rate	17.5	%	18.9	%	16.2	%	32.7	%

LEASES (Tables)

9 Months Ended

Sep. 30, 2019

Leases [Abstract]

Schedule of Lease Expense

The Evergy Companies’ lease expense is detailed in the following table.



Three Months Ended September 30, 2019	Evergy		Evergy Kansas Central		Evergy Metro
Finance lease costs	(millions)
Amortization of right-of-use assets	$	2.3	$	2.4	$	—
Interest on lease liabilities	1.0		0.9		—
Operating lease costs	4.8		2.0		2.4
Short-term lease costs	0.8		0.3		0.5
Variable lease costs for renewable purchase power agreements	71.3		30.3		29.0
Total lease costs	$	80.2	$	35.9	$	31.9

Year to Date September 30, 2019	Evergy		Evergy Kansas Central		Evergy Metro
Finance lease costs	(millions)
Amortization of right-of-use assets	$	4.0	$	3.9	$	0.1
Interest on lease liabilities	2.3		2.1		0.1
Operating lease costs	17.9		9.9		6.9
Short-term lease costs	2.3		0.6		1.6
Variable lease costs for renewable purchase power agreements	222.1		94.3		91.0
Total lease costs	$	248.6	$	110.8	$	99.7

Supplemental cash flow information related to the Evergy Companies' leases is detailed in the following table.



Year to Date September 30, 2019	Evergy		Evergy Kansas Central		Evergy Metro
Cash paid for amounts included in the measurement of lease liabilities:	(millions)
Operating cash flows from operating leases	$	17.4	$	10.2	$	7.2
Operating cash flows from finance leases	2.0		1.9		0.1
Financing cash flows from finance leases	3.3		3.2		0.1
Right-of-use assets obtained in exchange for new operating lease liabilities	3.0		0.6		2.4
Right-of-use assets obtained in exchange for new finance lease liabilities	2.3		2.3		—

Schedule of Payments for Finance Leases

Payments for finance leases as of September 30, 2019, are detailed in the following table.



	Evergy			Evergy Kansas Central			Evergy Metro
	(millions)
October 2019 through December 2019	$	1.8		$	1.7		$	0.1
2020	7.0			6.6			0.2
2021	6.5			6.0			0.2
2022	5.7			5.2			0.2
2023	4.8			4.4			0.2
After 2023	48.4			46.4			1.0
Total finance lease payments	74.2			70.3			1.9
Amounts representing imputed interest	(25.9		)	(24.8		)	(0.5		)
Present value of lease payments	48.3			45.5			1.4
Less: current portion	(4.8		)	(4.6		)	(0.1		)
Total long-term obligations under finance leases	$	43.5		$	40.9		$	1.3

Weighted-average remaining lease term (years)	15.3			15.7			8.9
Weighted-average discount rate	5.8		%	5.7		%	7.6		%

Schedule of Future Commitments Under Finance Leases

Estimated future commitments under finance leases as of December 31, 2018, are detailed in the following table.



	Evergy			Evergy Kansas Central			Evergy Metro
	(millions)
2019	$	6.4		$	6.0		$	0.2
2020	5.8			5.4			0.2
2021	5.3			4.9			0.2
2022	4.7			4.3			0.2
2023	4.0			3.6			0.2
After 2023	48.6			46.4			1.1
Total finance lease payments	74.8			70.6			2.1
Amounts representing imputed interest	(25.8		)	(24.6		)	(0.6		)
Present value of net minimum lease payments under finance leases	49.0			46.0			1.5
Less: current portion	(3.9		)	(3.7		)	(0.1		)
Total long-term obligations under finance leases	$	45.1		$	42.3		$	1.4

Schedule of Lease Payments for Operating Leases

Lease payments for operating leases as of September 30, 2019, are detailed in the following table.



	Evergy			Evergy Kansas Central			Evergy Metro
	(millions)
October 2019 through December 2019	$	5.0		$	2.8		$	2.7
2020	18.9			10.3			10.7
2021	15.4			7.4			10.1
2022	12.4			5.2			9.3
2023	9.4			2.7			8.8
After 2023	52.5			2.8			91.3
Total operating lease payments	113.6			31.2			132.9
Amounts representing imputed interest	(18.9		)	(2.1		)	(36.5		)
Present value of lease payments	94.7			29.1			96.4
Less: current portion	(15.2		)	(9.2		)	(6.8		)
Total long-term obligations under operating leases	$	79.5		$	19.9		$	89.6

Weighted-average remaining lease term (years)	9.1			3.7			15.9
Weighted-average discount rate	3.9		%	3.4		%	4.2		%

Schedule of Future Commitments Under Operating Leases

Estimated future commitments under operating leases as of December 31, 2018, are detailed in the following table.



	Evergy		Evergy Kansas Central		Evergy Metro
	(millions)
2019	$	24.2	$	14.0	$	10.2
2020	20.7		10.1		10.6
2021	18.4		8.1		10.3
2022	15.2		5.2		10.0
2023	12.4		2.8		9.6
After 2023	95.0		3.1		91.8
Total operating lease payments	$	185.9	$	43.3	$	142.5

ORGANIZATION AND BASIS OF PRESENTATION - Organization (Details) shares in Millions, customer in Millions		9 Months Ended
	Jun. 04, 2018 shares	Sep. 30, 2019 kV subsidiary customer segment mi MW
Summary Of Accounting Policies [Line Items]
Owned generating capacity and renewable purchased power \| MW		14,700
Number of customers served \| customer		1.6
Number of segments \| segment		1
Prairie Wind Transmission, LLC
Summary Of Accounting Policies [Line Items]
Transmission line length \| mi		108
Transmission line electrical potential \| kV		345
Evergy Kansas South Inc [Member] \| Evergy Kansas Central Inc [Member]
Summary Of Accounting Policies [Line Items]
Number of active wholly owned subsidiaries \| subsidiary		1
Transource Energy, LLC \| EvergyTransmissionCompanyLLC [Member]
Summary Of Accounting Policies [Line Items]
Ownership percentage		13.50%
Transource Energy, LLC \| AEP Transmission Holding Company, LLC
Summary Of Accounting Policies [Line Items]
Ownership interest		86.50%
Prairie Wind Transmission, LLC \| Evergy Kansas Central Inc [Member]
Summary Of Accounting Policies [Line Items]
Ownership percentage		50.00%
Evergy Kansas Central Inc [Member]
Summary Of Accounting Policies [Line Items]
Conversion ratio	1
Great Plains Energy
Summary Of Accounting Policies [Line Items]
Conversion ratio	0.5981
Number of shares issued (in shares) \| shares	128.9

ORGANIZATION AND BASIS OF PRESENTATION - Summary of Property, Plant and Equipment (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 18,976.1	$ 18,782.5
Electric plant in service
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	27,492.5	26,916.7
Property, plant and equipment, adjustment	740.6	740.6
Accumulated depreciation	(10,136.6)	(9,694.1)
Property, plant and equipment, net	18,096.5	17,963.2
Construction work in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	747.2	685.2
Nuclear fuel, net
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	131.4	133.1
Plant to be retired, net
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	1.0	1.0
Evergy Kansas Central Inc [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	9,753.7	9,718.3
Evergy Kansas Central Inc [Member] \| Electric plant in service
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	13,414.4	13,176.7
Property, plant and equipment, adjustment	740.6	740.6
Accumulated depreciation	(4,872.5)	(4,642.8)
Property, plant and equipment, net	9,282.5	9,274.5
Evergy Kansas Central Inc [Member] \| Construction work in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	404.9	376.7
Evergy Kansas Central Inc [Member] \| Nuclear fuel, net
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	65.3	66.1
Evergy Kansas Central Inc [Member] \| Plant to be retired, net
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	1.0	1.0
Evergy Metro Inc [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	6,775.6	6,688.1
Evergy Metro Inc [Member] \| Electric plant in service
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	10,673.6	10,439.1
Property, plant and equipment, adjustment	0.0	0.0
Accumulated depreciation	(4,208.5)	(4,022.4)
Property, plant and equipment, net	6,465.1	6,416.7
Evergy Metro Inc [Member] \| Construction work in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	244.4	204.4
Evergy Metro Inc [Member] \| Nuclear fuel, net
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	66.1	67.0
Evergy Metro Inc [Member] \| Plant to be retired, net
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 0.0	$ 0.0

ORGANIZATION AND BASIS OF PRESENTATION - Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Income
Net income	$ 370.9	$ 144.6	$ 103.4	$ 357.6	$ 104.4	$ 62.9	$ 618.9	$ 524.9
Less: Net income attributable to noncontrolling interests	4.1			2.6			12.9	7.6
Net income attributable to Evergy, Inc.	$ 366.8			$ 355.0			$ 606.0	$ 517.3
Common Shares Outstanding
Weighted average equivalent common shares outstanding - basic (in shares)	234.6			268.6			243.5	197.9
Add: effect of dilutive securities (in shares)	0.4			0.2			0.3	0.1
Diluted average number of common shares outstanding (in shares)	235.0			268.8			243.8	198.0
Earnings Per Share, Basic	$ 1.56			$ 1.32			$ 2.49	$ 2.61
Earnings Per Share, Diluted	1.56			1.32			2.49	2.61
Earnings Per Share, Basic and Diluted	$ 1.56			$ 1.32			$ 2.49	$ 2.61

ORGANIZATION AND BASIS OF PRESENTATION - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash paid for (received from):
Income taxes, net of refunds	$ (13.1)	$ 0.6
Interest Paid, Excluding Capitalized Interest, Operating Activities	240.8	148.7
Non-cash investing transactions:
Property, plant and equipment additions (reductions)	99.4	(24.8)
Non-cash financing transactions:
Issuance of stock for compensation and reinvested dividends	(0.3)	0.4
Variable Interest Entities
Cash paid for (received from):
Interest Paid, Including Capitalized Interest, Operating and Investing Activities	1.6	2.3
Evergy Kansas Central Inc [Member]
Cash paid for (received from):
Income taxes, net of refunds	1.8	0.0
Interest Paid, Excluding Capitalized Interest, Operating Activities	109.4	110.5
Non-cash investing transactions:
Property, plant and equipment additions (reductions)	35.3	(42.0)
Evergy Kansas Central Inc [Member] \| Variable Interest Entities
Cash paid for (received from):
Interest Paid, Including Capitalized Interest, Operating and Investing Activities	1.6	2.3
Evergy Metro Inc [Member]
Cash paid for (received from):
Income taxes, net of refunds	32.8	28.4
Interest Paid, Excluding Capitalized Interest, Operating Activities	83.5	87.6
Non-cash investing transactions:
Property, plant and equipment additions (reductions)	$ 60.8	$ 15.2

MERGER OF GREAT PLAINS ENERGY AND EVERGY KANSAS CENTRAL - Narrative (Details) $ in Millions		9 Months Ended
	Jun. 04, 2018 USD ($)	Sep. 30, 2019 USD ($)
Great Plains Energy
Anticipated Merger With Westar Energy, Inc. [Line Items]
Conversion ratio	0.5981
Purchase price	$ 6,975.7
Goodwill decrease from recognition of deferred tax assets		$ 2.3
Great Plains Energy \| Share-based Payment Arrangement
Anticipated Merger With Westar Energy, Inc. [Line Items]
Fair value of shares issued	$ 12.5
Evergy Kansas Central Inc [Member]
Anticipated Merger With Westar Energy, Inc. [Line Items]
Conversion ratio	1

Merger of Great Plains Energy and Evergy Kansas Central - Schedule Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018	Jun. 04, 2018
Business Acquisition [Line Items]
Goodwill	$ 2,336.6	$ 2,338.9
Great Plains Energy
Business Acquisition [Line Items]
Current assets			$ 2,151.7
Property, plant and equipment, net			9,179.7
Goodwill			2,336.6
Other long-term assets, excluding goodwill			1,235.9
Total assets			14,903.9
Current liabilities			1,673.9
Long-term liabilities, excluding long-term debt			2,895.7
Long-term debt, net			3,358.6
Total liabilities			7,928.2
Total purchase price			$ 6,975.7

RECEIVABLES (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Other receivables	$ 102.3	$ 95.0
Allowance for doubtful accounts	(8.9)	(9.2)
Total	268.8	193.7
Evergy Kansas Central Inc [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Other receivables	83.4	71.6
Allowance for doubtful accounts	(3.4)	(3.9)
Total	140.7	84.3
Evergy Metro Inc [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Other receivables	14.0	15.8
Allowance for doubtful accounts	(3.9)	(3.8)
Total	84.2	62.7
Customer accounts receivable \| Billed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customer accounts receivable	19.5	16.7
Customer accounts receivable \| Billed \| Evergy Kansas Central Inc [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customer accounts receivable	0.0	0.0
Customer accounts receivable \| Billed \| Evergy Metro Inc [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customer accounts receivable	9.1	7.8
Customer accounts receivable \| Unbilled
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customer accounts receivable	155.9	91.2
Customer accounts receivable \| Unbilled \| Evergy Kansas Central Inc [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customer accounts receivable	60.7	16.6
Customer accounts receivable \| Unbilled \| Evergy Metro Inc [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customer accounts receivable	$ 65.0	$ 42.9

REVENUE (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
REVENUE (Details) - USD ($) $ in Millions	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 1,566.3	$ 1,567.0	$ 3,945.8	$ 3,051.4
Other	11.3	15.5	70.4	24.7
Revenues	1,577.6	1,582.5	4,016.2	3,076.1
Evergy Kansas Central Inc [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	742.2	761.3	1,913.7	2,011.8
Other	6.8	3.5	17.6	4.1
Revenues	749.0	764.8	1,931.3	2,015.9
Evergy Metro Inc [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	563.0	550.8	1,379.0	1,360.2
Other	5.8	8.8	52.2	48.7
Revenues	568.8	559.6	1,431.2	1,408.9
Residential
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	653.0	647.1	1,536.3	1,169.4
Residential \| Evergy Kansas Central Inc [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	268.9	270.5	640.4	671.9
Residential \| Evergy Metro Inc [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	249.2	243.5	575.5	585.4
Commercial
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	539.1	530.5	1,391.2	945.0
Commercial \| Evergy Kansas Central Inc [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	219.3	217.4	556.4	542.8
Commercial \| Evergy Metro Inc [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	234.1	231.1	613.5	609.2
Industrial
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	175.3	173.4	478.9	375.5
Industrial \| Evergy Kansas Central Inc [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	111.3	111.9	308.5	297.2
Industrial \| Evergy Metro Inc [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	40.8	39.1	106.7	105.4
Other retail
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	16.0	10.9	35.3	21.5
Other retail \| Evergy Kansas Central Inc [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	5.6	5.4	15.8	15.3
Other retail \| Evergy Metro Inc [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	7.0	2.7	12.3	7.7
Total electric retail
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	1,383.4	1,361.9	3,441.7	2,511.4
Total electric retail \| Evergy Kansas Central Inc [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	605.1	605.2	1,521.1	1,527.2
Total electric retail \| Evergy Metro Inc [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	531.1	516.4	1,308.0	1,307.7
Wholesale
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	96.3	118.5	251.7	302.4
Wholesale \| Evergy Kansas Central Inc [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	67.7	82.4	182.5	263.7
Wholesale \| Evergy Metro Inc [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	23.5	29.9	54.7	38.5
Transmission
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	80.4	80.6	233.5	227.6
Transmission \| Evergy Kansas Central Inc [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	67.7	72.2	205.5	216.3
Transmission \| Evergy Metro Inc [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	7.8	3.8	14.0	11.0
Industrial steam and other
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	6.2	6.0	18.9	10.0
Industrial steam and other \| Evergy Kansas Central Inc [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	1.7	1.5	4.6	4.6
Industrial steam and other \| Evergy Metro Inc [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 0.6	$ 0.7	$ 2.3	$ 3.0

RECEIVABLES - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Entity Information [Line Items]
Other receivables, contracts with customers	$ 45.3	$ 65.8
Sale Of Accounts Receivable - KCPL and GMO
Accounts receivable pledged as collateral	395.0	365.0
Evergy Kansas Central Inc [Member]
Entity Information [Line Items]
Other receivables, contracts with customers	41.3	55.9
Sale Of Accounts Receivable - KCPL and GMO
Accounts receivable pledged as collateral	200.0	185.0
Evergy Metro Inc [Member]
Entity Information [Line Items]
Other receivables, contracts with customers	0.8	5.5
Sale Of Accounts Receivable - KCPL and GMO
Accounts receivable pledged as collateral	130.0	$ 130.0
Maximum amount of outstanding principal under receivables agreement	130.0
Borrowings From Mid November Through Mid June \| Evergy Missouri West Inc [Member]
Sale Of Accounts Receivable - KCPL and GMO
Maximum amount of outstanding principal under receivables agreement	50.0
Borrowings From Mid June Through Mid November [Member] \| Evergy Missouri West Inc [Member]
Sale Of Accounts Receivable - KCPL and GMO
Maximum amount of outstanding principal under receivables agreement	65.0
Borrowings From Mid June Through Mid October [Member] \| Evergy Kansas Central Inc [Member]
Sale Of Accounts Receivable - KCPL and GMO
Maximum amount of outstanding principal under receivables agreement	200.0
Borrowings From Mid October Through Mid June [Member] \| Evergy Kansas Central Inc [Member]
Sale Of Accounts Receivable - KCPL and GMO
Maximum amount of outstanding principal under receivables agreement	$ 185.0

RATE MATTERS AND REGULATION - Proceedings (Details) $ in Millions	1 Months Ended		9 Months Ended
	May 31, 2019 USD ($)	Apr. 30, 2019 USD ($)	Sep. 30, 2019 USD ($) Rate
Evergy Kansas Central Inc [Member] \| Jeffrey Energy Center
Regulatory Proceedings [Line Items]
Jointly owned utility plant, proportionate ownership share \| Rate			8.00%
Transmission Delivery Charge \| Evergy Kansas Central Inc [Member] \| Kansas Corporation Commission
Regulatory Proceedings [Line Items]
Annual revenue decrease approved		$ 7.7
Transmission Delivery Charge \| Evergy Metro Inc [Member] \| Kansas Corporation Commission
Regulatory Proceedings [Line Items]
Annual revenue decrease approved	$ 8.3
2018 Rate Case Proceedings \| Evergy Kansas Central Inc [Member] \| 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%
2018 Rate Case Proceedings \| Evergy Metro Inc [Member] \| Kansas Corporation Commission
Regulatory Proceedings [Line Items]
Refund percent on earnings over approved return on equity			0.5
Approved return on equity, percentage			9.30%
2018 MPSC OPC MECG Petition [Member]
Regulatory Proceedings [Line Items]
Annual Estimated Loss Contingency Portion Not Accrued			$ 15.0
2018 MPSC OPC MECG Petition [Member] \| Retired Generation Facility [Member]
Regulatory Proceedings [Line Items]
Regulatory Assets			131.6
Annual Amortization Of Regulatory Asset			7.0
FERC 2019 TFR Proceeding \| Evergy Kansas Central Inc [Member] \| Federal Energy Regulatory Commission
Regulatory Proceedings [Line Items]
Annual transmissions revenue estimated amount of decrease over prior year			11.2
FERC 2019 TFR Proceeding \| Evergy Metro Inc [Member] \| Federal Energy Regulatory Commission
Regulatory Proceedings [Line Items]
Annual transmissions revenue estimated amount of decrease over prior year			2.8
FERC 2020 TFR Proceeding [Member] \| Evergy Kansas Central Inc [Member] \| Federal Energy Regulatory Commission
Regulatory Proceedings [Line Items]
Annual transmissions revenue estimated amount of decrease over prior year			13.6
FERC 2020 TFR Proceeding [Member] \| Evergy Metro Inc [Member] \| Federal Energy Regulatory Commission
Regulatory Proceedings [Line Items]
Annual transmissions revenue estimated amount of decrease over prior year			1.7
2019 RECA Recovery Request [Member] \| Kansas Corporation Commission
Regulatory Proceedings [Line Items]
Pre Tax Loss To Operating And Maintenance Expense			8.4
2019 RECA Recovery Request [Member] \| Evergy Kansas Central Inc [Member] \| Kansas Corporation Commission
Regulatory Proceedings [Line Items]
Pre Tax Loss To Operating And Maintenance Expense			8.4
Revenues Probable Of Refund [Member] \| 2018 MPSC OPC MECG Petition [Member]
Regulatory Proceedings [Line Items]
Regulatory Liabilities			$ 6.5

PENSION PLANS AND POST-RETIREMENT BENEFITS (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Pension Benefits
Components of net periodic benefit costs
Service cost	$ 19.1	$ 20.2	$ 57.3	$ 40.4
Interest cost	27.5	26.3	82.4	56.2
Expected return on plan assets	(27.0)	(27.0)	(80.9)	(59.3)
Prior service cost	0.5	0.3	1.5	0.6
Recognized net actuarial (gain)/loss	6.9	8.1	20.6	24.4
Settlement and special termination benefits	14.5		14.5
Net periodic benefit costs before regulatory adjustment and intercompany allocations	41.5	27.9	95.4	62.3
Regulatory adjustment	4.9	2.6	30.4	8.4
Intercompany allocations	0.0	0.0	0.0	0.0
Net periodic benefit costs (income)	46.4	30.5	125.8	70.7
Contributions by employer			54.6
Contributions by employer, remainder of fiscal year	73.7		73.7
Pension Benefits \| Evergy Kansas Central Inc [Member]
Components of net periodic benefit costs
Service cost	7.3	8.0	21.8	24.1
Interest cost	13.4	12.7	40.3	38.1
Expected return on plan assets	(13.7)	(13.9)	(41.1)	(41.9)
Prior service cost	0.5	0.2	1.3	0.5
Recognized net actuarial (gain)/loss	6.2	8.1	19.0	24.4
Settlement and special termination benefits	0.0		0.0
Net periodic benefit costs before regulatory adjustment and intercompany allocations	13.7	15.1	41.3	45.2
Regulatory adjustment	0.5	2.8	1.5	8.4
Intercompany allocations	0.0	0.0	0.0	0.0
Net periodic benefit costs (income)	14.2	17.9	42.8	53.6
Contributions by employer			36.0
Contributions by employer, remainder of fiscal year	7.1		7.1
Pension Benefits \| Evergy Metro Inc [Member]
Components of net periodic benefit costs
Service cost	11.8	12.2	35.5	36.5
Interest cost	14.1	12.0	42.1	37.4
Expected return on plan assets	(12.3)	(13.9)	(36.9)	(41.6)
Prior service cost	0.2	0.2	0.7	0.5
Recognized net actuarial (gain)/loss	12.2	10.9	36.7	33.8
Settlement and special termination benefits	20.8		20.8
Net periodic benefit costs before regulatory adjustment and intercompany allocations	46.8	21.4	98.9	66.6
Regulatory adjustment	(14.7)	0.7	(15.9)	2.1
Intercompany allocations	(13.6)	(4.9)	(27.6)	(17.1)
Net periodic benefit costs (income)	18.5	17.2	55.4	51.6
Contributions by employer			18.6
Contributions by employer, remainder of fiscal year	66.6		66.6
Post-Retirement Benefits
Components of net periodic benefit costs
Service cost	0.6	0.7	1.9	1.5
Interest cost	2.6	2.5	7.9	5.4
Expected return on plan assets	(2.5)	(2.5)	(7.5)	(6.2)
Prior service cost	0.1	0.1	0.3	0.3
Recognized net actuarial (gain)/loss	(0.3)	(0.1)	(0.9)	(0.4)
Settlement and special termination benefits	0.0		0.0
Net periodic benefit costs before regulatory adjustment and intercompany allocations	0.5	0.7	1.7	0.6
Regulatory adjustment	(0.8)	(0.4)	(2.5)	(1.3)
Intercompany allocations	0.0	0.0	0.0	0.0
Net periodic benefit costs (income)	(0.3)	0.3	(0.8)	(0.7)
Contributions by employer			2.2
Contributions by employer, remainder of fiscal year	1.4		1.4
Post-Retirement Benefits \| Evergy Kansas Central Inc [Member]
Components of net periodic benefit costs
Service cost	0.2	0.4	0.8	1.0
Interest cost	1.4	1.2	4.2	3.7
Expected return on plan assets	(1.7)	(1.8)	(5.0)	(5.2)
Prior service cost	0.1	0.1	0.3	0.3
Recognized net actuarial (gain)/loss	(0.1)	(0.1)	(0.4)	(0.4)
Settlement and special termination benefits	0.0		0.0
Net periodic benefit costs before regulatory adjustment and intercompany allocations	(0.1)	(0.2)	(0.1)	(0.6)
Regulatory adjustment	(0.7)	(0.4)	(2.2)	(1.3)
Intercompany allocations	0.0	0.0	0.0	0.0
Net periodic benefit costs (income)	(0.8)	(0.6)	(2.3)	(1.9)
Contributions by employer			1.1
Post-Retirement Benefits \| Evergy Metro Inc [Member]
Components of net periodic benefit costs
Service cost	0.4	0.5	1.1	1.5
Interest cost	1.2	1.2	3.7	3.6
Expected return on plan assets	(0.8)	(0.7)	(2.5)	(2.1)
Prior service cost	0.0	0.0	0.0	0.0
Recognized net actuarial (gain)/loss	(0.3)	0.0	(1.1)	(0.1)
Settlement and special termination benefits	0.0		0.0
Net periodic benefit costs before regulatory adjustment and intercompany allocations	0.5	1.0	1.2	2.9
Regulatory adjustment	0.1	0.1	0.3	(0.2)
Intercompany allocations	(0.2)	(0.2)	(0.3)	(0.8)
Net periodic benefit costs (income)	0.4	$ 0.9	1.2	$ 1.9
Contributions by employer			1.1
Contributions by employer, remainder of fiscal year	$ 1.4		$ 1.4
Wolf Creek
Defined Benefit Plan Disclosure [Line Items]
Jointly owned utility plant, proportionate ownership share	94.00%		94.00%
Wolf Creek \| Evergy Kansas Central Inc [Member]
Defined Benefit Plan Disclosure [Line Items]
Jointly owned utility plant, proportionate ownership share	47.00%		47.00%
Wolf Creek \| Evergy Metro Inc [Member]
Defined Benefit Plan Disclosure [Line Items]
Jointly owned utility plant, proportionate ownership share	47.00%		47.00%

SHORT-TERM BORROWINGS AND SHORT-TERM BANK LINES OF CREDIT (Details)	1 Months Ended
	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($) loan	Dec. 31, 2018 USD ($)
Short-term Debt [Line Items]
Available borrowings	$ 2,127,100,000			$ 1,737,300,000
Line of Credit
Short-term Debt [Line Items]
Line of credit, maximum borrowing capacity			$ 1,000,000,000.0
Debt instrument, term			6 months
Number of loans \| loan			2
Proceeds from lines of credit		$ 500,000,000.0	$ 500,000,000.0
Number of remaining loans \| loan			1
Available borrowings			$ 500,000,000.0
Repayments of Lines of Credit	1,000,000,000.0
Cash Borrowings
Short-term Debt [Line Items]
Line of credit, maximum borrowing capacity	2,500,000,000
Debt instrument, debt default, threshold	$ 100,000,000.0
Debt Instrument, debt to capitalization ratio (no more than)	65.00%
Evergy Kansas Central Inc [Member]
Short-term Debt [Line Items]
Available borrowings	$ 808,400,000			570,000,000.0
Evergy Kansas Central Inc [Member] \| Cash Borrowings
Short-term Debt [Line Items]
Debt instrument, debt default, threshold	$ 100,000,000.0
Debt Instrument, debt to capitalization ratio (no more than)	65.00%
Evergy Metro Inc [Member]
Short-term Debt [Line Items]
Available borrowings	$ 525,100,000			420,400,000
Evergy Metro Inc [Member] \| Cash Borrowings
Short-term Debt [Line Items]
Debt instrument, debt default, threshold	$ 100,000,000.0
Debt Instrument, debt to capitalization ratio (no more than)	65.00%
Evergy Missouri West Inc [Member]
Short-term Debt [Line Items]
Available borrowings	$ 344,600,000			$ 297,900,000
Evergy Missouri West Inc [Member] \| Cash Borrowings
Short-term Debt [Line Items]
Debt instrument, debt default, threshold	$ 100,000,000.0
Debt Instrument, debt to capitalization ratio (no more than)	65.00%

SHORT-TERM BORROWINGS AND SHORT-TERM BANK LINES OF CREDIT - Schedule of Short Term Debt (Details) - USD ($) $ in Millions	1 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Short-term Debt [Line Items]
Credit Facility	$ 2,500.0	$ 2,500.0
Available Borrowings	2,127.1	1,737.3
Evergy, Inc.
Short-term Debt [Line Items]
Credit Facility	450.0	450.0
Available Borrowings	$ 449.0	$ 449.0
Weighted Average Interest Rate on Short-Term Borrowings	0.00%	0.00%
Evergy Kansas Central Inc [Member]
Short-term Debt [Line Items]
Credit Facility	$ 1,000.0	$ 1,000.0
Available Borrowings	$ 808.4	$ 570.0
Weighted Average Interest Rate on Short-Term Borrowings	2.29%	3.08%
Evergy Metro Inc [Member]
Short-term Debt [Line Items]
Credit Facility	$ 600.0	$ 600.0
Available Borrowings	$ 525.1	$ 420.4
Weighted Average Interest Rate on Short-Term Borrowings	2.28%	2.95%
Evergy Missouri West Inc [Member]
Short-term Debt [Line Items]
Credit Facility	$ 450.0	$ 450.0
Available Borrowings	$ 344.6	$ 297.9
Weighted Average Interest Rate on Short-Term Borrowings	2.30%	3.00%
Commercial Paper
Short-term Debt [Line Items]
Long-term line of credit	$ 360.6	$ 738.6
Commercial Paper \| Evergy Kansas Central Inc [Member]
Short-term Debt [Line Items]
Long-term line of credit	182.4	411.7
Commercial Paper \| Evergy Metro Inc [Member]
Short-term Debt [Line Items]
Long-term line of credit	74.9	176.9
Commercial Paper \| Evergy Missouri West Inc [Member]
Short-term Debt [Line Items]
Long-term line of credit	103.3	150.0
Letters of Credit
Short-term Debt [Line Items]
Letters of Credit	12.3	24.1
Letters of Credit \| Evergy, Inc.
Short-term Debt [Line Items]
Letters of Credit	1.0	1.0
Letters of Credit \| Evergy Kansas Central Inc [Member]
Short-term Debt [Line Items]
Letters of Credit	9.2	18.3
Letters of Credit \| Evergy Metro Inc [Member]
Short-term Debt [Line Items]
Letters of Credit	0.0	2.7
Letters of Credit \| Evergy Missouri West Inc [Member]
Short-term Debt [Line Items]
Letters of Credit	2.1	2.1
Cash Borrowings
Short-term Debt [Line Items]
Long-term line of credit	0.0	0.0
Cash Borrowings \| Evergy, Inc.
Short-term Debt [Line Items]
Long-term line of credit	0.0	0.0
Cash Borrowings \| Evergy Kansas Central Inc [Member]
Short-term Debt [Line Items]
Long-term line of credit	0.0	0.0
Cash Borrowings \| Evergy Metro Inc [Member]
Short-term Debt [Line Items]
Long-term line of credit	0.0	0.0
Cash Borrowings \| Evergy Missouri West Inc [Member]
Short-term Debt [Line Items]
Long-term line of credit	0.0	$ 0.0
Senior Notes [Member]
Short-term Debt [Line Items]
Proceeds from Issuance of Debt	$ 1,600.0

LONG-TERM DEBT (Details) - USD ($) $ in Millions	1 Months Ended
LONG-TERM DEBT (Details) - USD ($) $ in Millions	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2019	Aug. 31, 2019
Senior Notes [Member] \| Senior Notes Due 2024 Evergy [Member]
Debt Instrument [Line Items]
Long-term debt gross			$ 800.0
Interest rates (in hundredths)			2.45%
Senior Notes [Member] \| Senior Notes Due 2029 Evergy [Member]
Debt Instrument [Line Items]
Long-term debt gross			$ 800.0
Interest rates (in hundredths)			2.90%
Evergy Kansas Central Inc [Member] \| Secured Debt [Member] \| Mortgage Bonds Due 2049 KS Central [Member]
Debt Instrument [Line Items]
Long-term debt gross				$ 300.0
Interest rates (in hundredths)				3.25%
Evergy Metro Inc [Member] \| Unsecured Debt \| Senior Notes Due 2023 Evergy Metro [Member]
Debt Instrument [Line Items]
Long-term debt gross			$ 300.0
Interest rates (in hundredths)			3.15%
Evergy Metro Inc [Member] \| Unsecured Debt \| Senior Notes Due 2025 Evergy Metro [Member]
Debt Instrument [Line Items]
Long-term debt gross			$ 350.0
Interest rates (in hundredths)			3.65%
Evergy Metro Inc [Member] \| Unsecured Debt \| Senior Notes Due 2035 Evergy Metro [Member]
Debt Instrument [Line Items]
Long-term debt gross			$ 250.0
Interest rates (in hundredths)			6.05%
Evergy Metro Inc [Member] \| Unsecured Debt \| Senior Notes Due 2041 Evergy Metro [Member]
Debt Instrument [Line Items]
Long-term debt gross			$ 400.0
Interest rates (in hundredths)			5.30%
Evergy Metro Inc [Member] \| Unsecured Debt \| Senior Notes Due 2047 Evergy Metro [Member]
Debt Instrument [Line Items]
Long-term debt gross			$ 300.0
Interest rates (in hundredths)			4.20%
Evergy Metro Inc [Member] \| Unsecured Debt \| Senior Notes Due 2048 Evergy Metro [Member]
Debt Instrument [Line Items]
Long-term debt gross			$ 300.0
Interest rates (in hundredths)			4.20%
Evergy Metro Inc [Member] \| Secured Debt [Member] \| Mortgage Bonds Due 2049 Evergy Metro [Member]
Debt Instrument [Line Items]
Long-term debt gross		$ 400.0
Interest rates (in hundredths)		4.125%
Evergy Metro Inc [Member] \| Secured Debt [Member] \| Mortgage Bonds Due 2019 Evergy Metro [Member]
Debt Instrument [Line Items]
Interest rates (in hundredths)		7.15%
Repayments of long-term debt		$ 400.0
Evergy Missouri West Inc [Member] \| Senior Notes [Member] \| Senior Notes Due 2022 Evergy MO West [Member]
Debt Instrument [Line Items]
Long-term debt gross		$ 100.0
Interest rates (in hundredths)		3.74%
Evergy Kansas South Inc [Member] \| Secured Debt [Member] \| Mortgage Bonds Due 2019 Evergy KS South [Member]
Debt Instrument [Line Items]
Interest rates (in hundredths)	6.70%
Repayments of long-term debt	$ 300.0

FAIR VALUE MEASUREMENTS - Debt (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended		10 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, Notional Amount							$ 500.0
Gain (Loss) on Contract Termination				$ 69.8	$ 0.0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax		$ 29.4	$ 0.0	64.4	0.0	$ 69.8
Reclassification to expenses, net of tax		0.2	0.0	0.2	0.0
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	$ 5.2	5.2		5.2		5.2
Book Value \| Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	9,000.3	9,000.3		9,000.3		9,000.3	7,341.7
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	51.1	51.1		51.1		51.1	81.4
Fair Value \| Fair Value, Measurements, Recurring \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	9,843.1	9,843.1		9,843.1		9,843.1	7,412.1
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	51.3	51.3		51.3		51.3	81.3
Evergy Kansas Central Inc [Member] \| Book Value \| Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	3,685.6	3,685.6		3,685.6		3,685.6	3,689.8
Evergy Kansas Central Inc [Member] \| 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	51.1	51.1		51.1		51.1	81.4
Evergy Kansas Central Inc [Member] \| Fair Value \| Fair Value, Measurements, Recurring \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	4,139.0	4,139.0		4,139.0		4,139.0	3,771.3
Evergy Kansas Central Inc [Member] \| 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	51.3	51.3		51.3		51.3	81.3
Evergy Metro Inc [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Reclassification to expenses, net of tax		(0.1)	$ 0.8	0.7	$ 2.7
Evergy Metro Inc [Member] \| Book Value \| Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	2,524.6	2,524.6		2,524.6		2,524.6	2,530.1
Evergy Metro Inc [Member] \| Fair Value \| Fair Value, Measurements, Recurring \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	2,962.7	2,962.7		2,962.7		2,962.7	2,637.5
Long-Term debt fair value adjustment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt gross	129.2	129.2		129.2		129.2	$ 144.8
Senior Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Proceeds from Issuance of Debt	1,600.0
Senior Notes [Member] \| Senior Notes Due 2029 Evergy [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt gross	$ 800.0	$ 800.0		$ 800.0		$ 800.0
Debt Instrument, Interest Rate, Stated Percentage	2.90%	2.90%		2.90%		2.90%

FAIR VALUE MEASUREMENTS - NAV (Details) $ in Millions	9 Months Ended
FAIR VALUE MEASUREMENTS - NAV (Details) $ in Millions	Sep. 30, 2019 USD ($) fund extension	Dec. 31, 2018 USD ($)
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Commitments	$ 3.6	$ 4.3
Evergy Kansas Central Inc [Member] \| Alternative investments fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Commitments	$ 0.0	0.0
Length of Settlement	65 days
Evergy Kansas Central Inc [Member] \| Real estate securities fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Commitments	$ 0.0	0.0
Length of Settlement	65 days
Evergy Kansas Central Inc [Member] \| Nuclear decommissioning trust:
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust	$ 43.7
Unfunded Commitments	3.6	4.3
Evergy Kansas Central Inc [Member] \| Core bond fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Commitments	0.0	0.0
Evergy Kansas Central Inc [Member] \| Combination debt/equity/other fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Commitments	0.0	0.0
Evergy Kansas Central Inc [Member] \| Rabbi trust:
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Commitments	0.0	0.0
Other Evergy
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Commitments	0.0	0.0
Domestic \| Evergy Kansas Central Inc [Member] \| Equity securities
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Commitments	$ 3.6	4.3
NAV, Number of funds \| fund	5
NAV, Number of funds making distributions \| fund	3
Domestic \| Evergy Kansas Central Inc [Member] \| 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 Inc [Member] \| 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	$ 541.0	472.1
Total rabbi trust	45.6	43.8
Total Assets	596.9	528.3
Fair Value, Measurements, Recurring \| Evergy Kansas Central Inc [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust	258.5	227.5
Total rabbi trust	31.8	30.6
Total Assets	290.3	258.1
Fair Value, Measurements, Recurring \| Evergy Kansas Central Inc [Member] \| Alternative investments fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust	24.8	24.1
Fair Value, Measurements, Recurring \| Evergy Kansas Central Inc [Member] \| Real estate securities fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust	12.4	11.8
Fair Value, Measurements, Recurring \| Evergy Kansas Central Inc [Member] \| Core bond fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust	36.6	37.5
Total rabbi trust	25.5	24.8
Fair Value, Measurements, Recurring \| Evergy Kansas Central Inc [Member] \| Combination debt/equity/other fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust	15.4	12.9
Total rabbi trust	6.1	5.6
Fair Value, Measurements, Recurring \| Other Evergy
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total rabbi trust	13.8	13.2
Fair Value, Measurements, Recurring \| Domestic \| Evergy Kansas Central Inc [Member] \| Equity securities
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust	84.0	70.6
NAV \| Fair Value, Measurements, Recurring
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust	43.7	42.6
Total rabbi trust	44.9	43.6
Total Assets	88.6	86.2
NAV \| Fair Value, Measurements, Recurring \| Evergy Kansas Central Inc [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust	43.7	42.6
Total rabbi trust	31.6	30.4
Total Assets	75.3	73.0
NAV \| Fair Value, Measurements, Recurring \| Evergy Kansas Central Inc [Member] \| Alternative investments fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust	24.8	24.1
NAV \| Fair Value, Measurements, Recurring \| Evergy Kansas Central Inc [Member] \| Real estate securities fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust	12.4	11.8
NAV \| Fair Value, Measurements, Recurring \| Evergy Kansas Central Inc [Member] \| Nuclear decommissioning trust:
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust		42.6
NAV \| Fair Value, Measurements, Recurring \| Evergy Kansas Central Inc [Member] \| Core bond fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust	0.0	0.0
Total rabbi trust	25.5	24.8
NAV \| Fair Value, Measurements, Recurring \| Evergy Kansas Central Inc [Member] \| Combination debt/equity/other fund
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust	0.0	0.0
Total rabbi trust	6.1	5.6
NAV \| Fair Value, Measurements, Recurring \| Evergy Kansas Central Inc [Member] \| Rabbi trust:
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total rabbi trust	31.6	30.4
NAV \| Fair Value, Measurements, Recurring \| Other Evergy
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total rabbi trust	13.3	13.2
NAV \| Fair Value, Measurements, Recurring \| Domestic \| Evergy Kansas Central Inc [Member] \| Equity securities
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Total nuclear decommissioning trust	$ 6.5	$ 6.7

FAIR VALUE MEASUREMENTS - Gain (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Unrealized gain (losses)	$ 2.1	$ 18.3	$ 59.2	$ 3.4
Nuclear decommissioning trust - equity securities
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Unrealized gain (losses)	(0.3)	15.1	50.9	1.1
Rabbi trusts
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Unrealized gain (losses)	0.9	3.7	2.4	3.1
Nuclear decommissioning trust - debt securities
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Unrealized gain (losses)	1.5	(0.5)	5.9	(0.8)
Evergy Kansas Central Inc [Member]
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Unrealized gain (losses)	0.7	10.2	28.9	(3.2)
Evergy Kansas Central Inc [Member] \| Nuclear decommissioning trust - equity securities
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Unrealized gain (losses)	0.2	6.5	26.2	(6.4)
Evergy Kansas Central Inc [Member] \| Rabbi trusts
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Unrealized gain (losses)	0.5	3.7	2.7	3.2
Evergy Metro Inc [Member]
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Unrealized gain (losses)	1.0	8.1	30.6	6.3
Evergy Metro Inc [Member] \| Nuclear decommissioning trust - equity securities
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Unrealized gain (losses)	(0.5)	8.6	24.7	9.1
Evergy Metro Inc [Member] \| Nuclear decommissioning trust - debt securities
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Unrealized gain (losses)	$ 1.5	$ (0.5)	$ 5.9	$ (2.8)

RELATED PARTY TRANSACTIONS AND RELATIONSHIPS (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Related Party Transaction [Line Items]
Less: current portion	$ 15.2		$ 15.2
Total long-term obligations under operating leases	79.5		79.5
Evergy Kansas Central Inc [Member]
Related Party Transaction [Line Items]
Less: current portion	9.2		9.2
Total long-term obligations under operating leases	19.9		19.9
Evergy Kansas Central Inc [Member] \| Evergy Metro Inc [Member]
Related Party Transaction [Line Items]
Due from (to) related parties	(6.9)		(6.9)		$ (13.5)
Evergy Kansas Central Inc [Member] \| Evergy Metro Inc [Member] \| Operating Expenses and Capital Costs Billed
Related Party Transaction [Line Items]
Related party transaction	9.7	$ 4.8	26.0	$ 10.8
Evergy Kansas Central Inc [Member] \| Evergy Missouri West Inc [Member]
Related Party Transaction [Line Items]
Due from (to) related parties	1.7		1.7		2.6
Evergy Kansas Central Inc [Member] \| Evergy
Related Party Transaction [Line Items]
Due from (to) related parties	(0.3)		(0.3)		(1.4)
Evergy Kansas Central Inc [Member] \| Evergy \| Income Tax Receivable
Related Party Transaction [Line Items]
Due from (to) related parties	6.1		6.1		42.7
Evergy Metro Inc [Member]
Related Party Transaction [Line Items]
Less: current portion	6.8		6.8
Total long-term obligations under operating leases	89.6		89.6
Evergy Metro Inc [Member] \| Money Pool
Related Party Transaction [Line Items]
Due from (to) related parties	0.0		0.0		0.0
Evergy Metro Inc [Member] \| Evergy Kansas Central Inc [Member]
Related Party Transaction [Line Items]
Due from (to) related parties	6.9		6.9		13.5
Evergy Metro Inc [Member] \| Evergy Missouri West Inc [Member]
Related Party Transaction [Line Items]
Due from (to) related parties	66.7		66.7		72.6
Evergy Metro Inc [Member] \| Evergy
Related Party Transaction [Line Items]
Due from (to) related parties	16.7		16.7		15.7
Evergy Metro Inc [Member] \| Evergy \| Income Taxes Payable
Related Party Transaction [Line Items]
Due from (to) related parties	(10.6)		(10.6)		$ (2.0)
Jointly Owned Electricity Generation Plant Iatan No 1 And 2 \| Evergy Metro Inc [Member] \| Evergy Missouri West Inc [Member] \| Operating Expenses and Capital Costs Billed
Related Party Transaction [Line Items]
Related party transaction	$ 41.6	43.4	$ 125.8	139.6
Jointly Owned Electricity Generation Plant Iatan No 1 And 2 \| Evergy Missouri West Inc [Member]
Related Party Transaction [Line Items]
Jointly owned utility plant, proportionate ownership share	18.00%		18.00%
Jeffrey Energy Center \| Evergy Kansas Central Inc [Member]
Related Party Transaction [Line Items]
Jointly owned utility plant, proportionate ownership share	8.00%		8.00%
Jeffrey Energy Center \| Evergy Kansas Central Inc [Member] \| Evergy Missouri West Inc [Member] \| Operating Expenses and Capital Costs Billed
Related Party Transaction [Line Items]
Related party transaction	$ 4.5	0.8	$ 17.2	4.5
Jeffrey Energy Center \| Evergy Missouri West Inc [Member]
Related Party Transaction [Line Items]
Jointly owned utility plant, proportionate ownership share	8.00%		8.00%
La Cygne Station \| Evergy Kansas Central Inc [Member]
Related Party Transaction [Line Items]
Jointly owned utility plant, proportionate ownership share	50.00%		50.00%
La Cygne Station \| Evergy Metro Inc [Member] \| Evergy Kansas Central Inc [Member] \| Operating Expenses and Capital Costs Billed
Related Party Transaction [Line Items]
Related party transaction	$ 33.0	$ 35.5	$ 108.8	$ 50.8
Evergy Kansas Central Inc [Member] \| Evergy Metro Inc [Member] \| Subsidiary of Common Parent
Related Party Transaction [Line Items]
Operating lease, right-of-use asset	29.6		29.6
Less: current portion	0.6		0.6
Total long-term obligations under operating leases	$ 29.0		$ 29.0

SHAREHOLDERS' EQUITY (Details) - USD ($)	9 Months Ended	15 Months Ended
SHAREHOLDERS' EQUITY (Details) - USD ($)	Sep. 30, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Feb. 28, 2019	Dec. 31, 2018	Nov. 30, 2018	Jul. 31, 2018
Line of Credit Facility [Line Items]
Number of shares authorized to be repurchased (in shares)								60,000,000
Stock repurchased and retired during period under repurchase plan, value	$ 1,628,700,000	$ 2,700,000,000
Stock repurchased and retired during period (in shares)	27,500,000	43,900,000
Restriction on payment of dividends, minimum ratio of total capitalization	35.00%	35.00%
Restricted net assets of subsidiaries	$ 5,000,000,000.0	$ 5,000,000,000.0
Cash Borrowings
Line of Credit Facility [Line Items]
Debt instrument, debt to capitalization ratio (no more than)	65.00%	65.00%
Evergy Kansas Central Inc [Member]
Line of Credit Facility [Line Items]
Restriction on payment of dividends, minimum ratio of total capitalization	40.00%	40.00%
Evergy Kansas Central Inc [Member] \| Cash Borrowings
Line of Credit Facility [Line Items]
Debt instrument, debt to capitalization ratio (no more than)	65.00%	65.00%
Evergy Metro Inc [Member]
Line of Credit Facility [Line Items]
Restriction on payment of dividends, minimum ratio of total capitalization	40.00%	40.00%
Retained earnings restrictions	$ 120,000,000.0	$ 120,000,000.0
Evergy Metro Inc [Member] \| Cash Borrowings
Line of Credit Facility [Line Items]
Debt instrument, debt to capitalization ratio (no more than)	65.00%	65.00%
Evergy Missouri West Inc [Member] \| Cash Borrowings
Line of Credit Facility [Line Items]
Debt instrument, debt to capitalization ratio (no more than)	65.00%	65.00%
November 2018 ASR Agreement
Line of Credit Facility [Line Items]
Stock repurchase program, authorized amount							$ 475,000,000.0
Partial settlement of accelerated share repurchase agreement (in shares)					1,900,000	6,400,000
Accelerated share repurchases, payment						$ 475,000,000.0
March 2019 ASR Agreement
Line of Credit Facility [Line Items]
Stock repurchase program, authorized amount				$ 450,000,000.0
Partial settlement of accelerated share repurchase agreement (in shares)			1,500,000	6,300,000
Accelerated share repurchases, payment				$ 450,000,000.0
June 2019 ASR Agreement
Line of Credit Facility [Line Items]
Stock repurchase program, authorized amount			$ 500,000,000.0
Partial settlement of accelerated share repurchase agreement (in shares)	1,000,000.0	1,000,000.0	7,100,000
Accelerated share repurchases, payment			$ 500,000,000.0
September 2019 ASR Agreement [Member]
Line of Credit Facility [Line Items]
Stock repurchase program, authorized amount	$ 500,000,000.0	$ 500,000,000.0
Partial settlement of accelerated share repurchase agreement (in shares)	6,600,000	6,600,000
Accelerated share repurchases, payment	$ 500,000,000.0	$ 500,000,000.0

TAXES - Income Tax Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Current income taxes
Federal	$ (31.2)	$ (30.3)	$ (10.6)	$ (21.5)
State	(0.8)	1.5	(1.6)	1.9
Total	(32.0)	(28.8)	(12.2)	(19.6)
Deferred income taxes
Federal	75.5	70.6	78.0	86.0
State	23.0	23.3	36.5	(35.7)
Total	98.5	93.9	114.5	50.3
Investment tax credit amortization	(1.0)	(1.0)	(3.1)	(2.4)
Income tax expense	$ 65.5	$ 64.1	$ 99.2	$ 28.3
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Federal statutory income tax rate	21.00%	21.00%	21.00%	21.00%
Effect of:
COLI policies	(1.60%)	(2.40%)	(1.70%)	(2.40%)
State income taxes	4.00%	4.60%	3.90%	4.70%
Flow through depreciation for plant-related differences	(3.10%)	(1.50%)	(3.20%)	(1.60%)
Federal tax credits	(3.90%)	(7.50%)	(3.90%)	(7.50%)
Non-controlling interest	(0.40%)	(0.40%)	(0.40%)	(0.40%)
AFUDC equity	0.00%	(0.10%)	0.00%	(0.10%)
Amortization of federal investment tax credits	(0.50%)	(0.60%)	(0.50%)	(0.60%)
State tax rate change	0.00%	0.10%	0.00%	(9.50%)
Changes In Uncertain Tax Positions, Net	(0.40%)	0.00%	(0.30%)	0.00%
Valuation allowance	0.00%	0.00%	(1.10%)	0.40%
Stock compensation	0.30%	0.00%	0.20%	(0.50%)
Officer compensation limitation	0.10%	1.20%	0.10%	1.20%
Other	(0.50%)	0.80%	(0.30%)	0.40%
Effective income tax rate	15.00%	15.20%	13.80%	5.10%
Evergy Kansas Central Inc [Member]
Current income taxes
Federal	$ 11.2	$ 8.0	$ 39.1	$ 18.9
State	(1.2)	(9.2)	(2.4)	(6.7)
Total	10.0	(1.2)	36.7	12.2
Deferred income taxes
Federal	4.6	12.3	(9.3)	15.4
State	12.0	12.0	21.1	(47.6)
Total	16.6	24.3	11.8	(32.2)
Investment tax credit amortization	(0.8)	(0.7)	(2.3)	(2.0)
Income tax expense	$ 25.8	$ 22.4	$ 46.2	$ (22.0)
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Federal statutory income tax rate	21.00%	21.00%	21.00%	21.00%
Effect of:
COLI policies	(2.80%)	(4.00%)	(3.00%)	(4.00%)
State income taxes	4.40%	1.10%	4.20%	3.30%
Flow through depreciation for plant-related differences	0.80%	1.50%	0.50%	0.30%
Federal tax credits	(6.20%)	(11.80%)	(6.10%)	(11.70%)
Non-controlling interest	(0.80%)	(0.60%)	(0.80%)	(0.70%)
AFUDC equity	(0.10%)	(0.10%)	(0.10%)	(0.10%)
Amortization of federal investment tax credits	(0.70%)	(0.80%)	(0.70%)	(0.80%)
State tax rate change	0.00%	0.00%	0.00%	(17.70%)
Changes In Uncertain Tax Positions, Net	(0.90%)	0.10%	(0.50%)	0.10%
Valuation allowance	0.00%	0.00%	(0.50%)	0.60%
Stock compensation	0.00%	0.00%	(0.10%)	(0.90%)
Officer compensation limitation	0.00%	1.90%	0.00%	1.90%
Other	(1.40%)	2.90%	(0.70%)	1.30%
Effective income tax rate	13.30%	11.20%	13.20%	(7.40%)
Evergy Metro Inc [Member]
Current income taxes
Federal	$ (2.2)	$ 20.7	$ 32.1	$ 43.5
State	3.9	6.8	9.3	11.6
Total	1.7	27.5	41.4	55.1
Deferred income taxes
Federal	26.3	(1.9)	1.4	(23.4)
State	4.5	2.7	1.9	49.4
Total	30.8	0.8	3.3	26.0
Investment tax credit amortization	(0.3)	(0.3)	(0.8)	(0.8)
Income tax expense	$ 32.2	$ 28.0	$ 43.9	$ 80.3
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Federal statutory income tax rate	21.00%	21.00%	21.00%	21.00%
Effect of:
COLI policies	(0.10%)	(0.20%)	(0.10%)	(0.20%)
State income taxes	3.60%	5.00%	3.20%	5.10%
Flow through depreciation for plant-related differences	(6.10%)	(4.90%)	(6.10%)	(4.90%)
Federal tax credits	(1.30%)	(1.90%)	(1.40%)	(1.80%)
AFUDC equity	0.00%	0.00%	0.00%	(0.10%)
Amortization of federal investment tax credits	(0.30%)	(0.40%)	(0.30%)	(0.40%)
State tax rate change	0.00%	0.00%	0.00%	14.50%
Officer compensation limitation	0.30%	0.70%	0.30%	0.50%
Other	0.40%	(0.40%)	(0.40%)	(1.00%)
Effective income tax rate	17.50%	18.90%	16.20%	32.70%

LEASES - Schedule of Lease Expense (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Finance lease costs
Amortization of right-of-use assets	$ 2.3	$ 4.0
Interest on lease liabilities	1.0	2.3
Operating lease costs	4.8	17.9
Short-term lease costs	0.8	2.3
Variable lease costs for renewable purchase power agreements	71.3	222.1
Total lease costs	80.2	248.6
Evergy Kansas Central Inc [Member]
Finance lease costs
Amortization of right-of-use assets	2.4	3.9
Interest on lease liabilities	0.9	2.1
Operating lease costs	2.0	9.9
Short-term lease costs	0.3	0.6
Variable lease costs for renewable purchase power agreements	30.3	94.3
Total lease costs	35.9	110.8
Evergy Metro Inc [Member]
Finance lease costs
Amortization of right-of-use assets	0.0	0.1
Interest on lease liabilities	0.0	0.1
Operating lease costs	2.4	6.9
Short-term lease costs	0.5	1.6
Variable lease costs for renewable purchase power agreements	29.0	91.0
Total lease costs	$ 31.9	$ 99.7

LEASES - Supplemental Cash Flow Information (Details) $ in Millions	9 Months Ended
	Sep. 30, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 17.4
Operating cash flows from finance leases	2.0
Financing cash flows from finance leases	3.3
Right-of-use assets obtained in exchange for new operating lease liabilities	3.0
Right-of-use assets obtained in exchange for new finance lease liabilities	2.3
Evergy Kansas Central Inc [Member]
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	10.2
Operating cash flows from finance leases	1.9
Financing cash flows from finance leases	3.2
Right-of-use assets obtained in exchange for new operating lease liabilities	0.6
Right-of-use assets obtained in exchange for new finance lease liabilities	2.3
Evergy Metro Inc [Member]
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	7.2
Operating cash flows from finance leases	0.1
Financing cash flows from finance leases	0.1
Right-of-use assets obtained in exchange for new operating lease liabilities	2.4
Right-of-use assets obtained in exchange for new finance lease liabilities	$ 0.0

LEASES - Schedule of Future Payments for Finance Leases (Details) $ in Millions	Sep. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
October 2019 through December 2019	$ 1.8
2020	7.0
2021	6.5
2022	5.7
2023	4.8
After 2023	48.4
Total finance lease payments	74.2
Amounts representing imputed interest	(25.9)
Present value of lease payments	48.3
Less: current portion	(4.8)
Total long-term obligations under finance leases	$ 43.5
Weighted-average remaining lease term (years)	15 years 3 months 18 days
Weighted-average discount rate	5.80%
Evergy Kansas Central Inc [Member]
Lessee, Lease, Description [Line Items]
October 2019 through December 2019	$ 1.7
2020	6.6
2021	6.0
2022	5.2
2023	4.4
After 2023	46.4
Total finance lease payments	70.3
Amounts representing imputed interest	(24.8)
Present value of lease payments	45.5
Less: current portion	(4.6)
Total long-term obligations under finance leases	$ 40.9
Weighted-average remaining lease term (years)	15 years 8 months 12 days
Weighted-average discount rate	5.70%
Evergy Metro Inc [Member]
Lessee, Lease, Description [Line Items]
October 2019 through December 2019	$ 0.1
2020	0.2
2021	0.2
2022	0.2
2023	0.2
After 2023	1.0
Total finance lease payments	1.9
Amounts representing imputed interest	(0.5)
Present value of lease payments	1.4
Less: current portion	(0.1)
Total long-term obligations under finance leases	$ 1.3
Weighted-average remaining lease term (years)	8 years 10 months 24 days
Weighted-average discount rate	7.60%

LEASES - Estimated Future Commitments Under Finance Leases (Details) $ in Millions	Dec. 31, 2018 USD ($)
Lessee, Lease, Description [Line Items]
2019	$ 6.4
2020	5.8
2021	5.3
2022	4.7
2023	4.0
After 2023	48.6
Total finance lease payments	74.8
Amounts representing imputed interest	(25.8)
Present value of net minimum lease payments under finance leases	49.0
Less: current portion	(3.9)
Total long-term obligations under finance leases	45.1
Evergy Kansas Central Inc [Member]
Lessee, Lease, Description [Line Items]
2019	6.0
2020	5.4
2021	4.9
2022	4.3
2023	3.6
After 2023	46.4
Total finance lease payments	70.6
Amounts representing imputed interest	(24.6)
Present value of net minimum lease payments under finance leases	46.0
Less: current portion	(3.7)
Total long-term obligations under finance leases	42.3
Evergy Metro Inc [Member]
Lessee, Lease, Description [Line Items]
2019	0.2
2020	0.2
2021	0.2
2022	0.2
2023	0.2
After 2023	1.1
Total finance lease payments	2.1
Amounts representing imputed interest	(0.6)
Present value of net minimum lease payments under finance leases	1.5
Less: current portion	(0.1)
Total long-term obligations under finance leases	$ 1.4

LEASES - Lease Payments for Operating Leases (Details) $ in Millions	Sep. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
October 2019 through December 2019	$ 5.0
2020	18.9
2021	15.4
2022	12.4
2023	9.4
After 2023	52.5
Total operating lease payments	113.6
Amounts representing imputed interest	(18.9)
Present value of lease payments	94.7
Less: current portion	(15.2)
Total long-term obligations under operating leases	$ 79.5
Weighted-average remaining lease term (years)	9 years 1 month 6 days
Weighted-average discount rate	3.90%
Evergy Kansas Central Inc [Member]
Lessee, Lease, Description [Line Items]
October 2019 through December 2019	$ 2.8
2020	10.3
2021	7.4
2022	5.2
2023	2.7
After 2023	2.8
Total operating lease payments	31.2
Amounts representing imputed interest	(2.1)
Present value of lease payments	29.1
Less: current portion	(9.2)
Total long-term obligations under operating leases	$ 19.9
Weighted-average remaining lease term (years)	3 years 8 months 12 days
Weighted-average discount rate	3.40%
Evergy Metro Inc [Member]
Lessee, Lease, Description [Line Items]
October 2019 through December 2019	$ 2.7
2020	10.7
2021	10.1
2022	9.3
2023	8.8
After 2023	91.3
Total operating lease payments	132.9
Amounts representing imputed interest	(36.5)
Present value of lease payments	96.4
Less: current portion	(6.8)
Total long-term obligations under operating leases	$ 89.6
Weighted-average remaining lease term (years)	15 years 10 months 24 days
Weighted-average discount rate	4.20%

LEASES - Estimated Future Commitments Under Operating Leases (Details) $ in Millions	Dec. 31, 2018 USD ($)
Lessee, Lease, Description [Line Items]
2019	$ 24.2
2020	20.7
2021	18.4
2022	15.2
2023	12.4
After 2023	95.0
Total operating lease payments	185.9
Evergy Kansas Central Inc [Member]
Lessee, Lease, Description [Line Items]
2019	14.0
2020	10.1
2021	8.1
2022	5.2
2023	2.8
After 2023	3.1
Total operating lease payments	43.3
Evergy Metro Inc [Member]
Lessee, Lease, Description [Line Items]
2019	10.2
2020	10.6
2021	10.3
2022	10.0
2023	9.6
After 2023	91.8
Total operating lease payments	$ 142.5

Consolidated Balance Sheets (Parenthetical) - shares	Sep. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Common stock - shares authorized (in shares)	600,000,000	600,000,000
Common stock - shares issued (in shares)	227,901,556	255,326,252

Consolidated Balance Sheets - Evergy Kansas Central, Inc (Parenthetical) - $ / shares	Sep. 30, 2019	Dec. 31, 2018
Common stock - shares authorized (in shares)	600,000,000	600,000,000
Common stock - shares issued (in shares)	227,901,556	255,326,252
Evergy Kansas Central Inc [Member]
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

GOODWILL	9 Months Ended
GOODWILL	Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL	GOODWILL Accounting rules require 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, 2019. 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.

ORGANIZATION AND BASIS OF PRESENTATION - Dividends Declared (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended
	Nov. 06, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Nov. 01, 2019
Dividends Payable [Line Items]
Dividends declared on common stock (in dollars per share)		$ 0.475	$ 0.475	$ 0.475	$ 0.46	$ 0.4	$ 0.4
Subsequent Event \| Evergy Metro Inc [Member]
Dividends Payable [Line Items]
Dividends payable								$ 40.0
Common Stock \| Subsequent Event
Dividends Payable [Line Items]
Dividends declared on common stock (in dollars per share)	$ 0.505

GOODWILL (Details) $ in Millions	9 Months Ended
GOODWILL (Details) $ in Millions	Sep. 30, 2019 USD ($) reporting_unit	Dec. 31, 2018 USD ($)
Goodwill [Line Items]
Goodwill \| $	$ 2,336.6	$ 2,338.9
Number of reporting units \| reporting_unit	1

Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Statement of Cash Flows [Abstract]
Restricted cash	$ 0.0	$ 0.0	$ 0.1	$ 0.1

ORGANIZATION AND BASIS OF PRESENTATION - Fuel Inventory and Supplies (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Inventory [Line Items]
Fuel inventory	$ 118.5	$ 168.9
Supplies	335.9	342.1
Fuel inventory and supplies	454.4	511.0
Evergy Kansas Central Inc [Member]
Inventory [Line Items]
Fuel inventory	64.8	87.8
Supplies	182.9	189.0
Fuel inventory and supplies	247.7	276.8
Evergy Metro Inc [Member]
Inventory [Line Items]
Fuel inventory	37.1	57.8
Supplies	120.1	119.8
Fuel inventory and supplies	$ 157.2	$ 177.6

ORGANIZATION AND BASIS OF PRESENTATION - New Accounting Pronouncements (Details) - ASU 2016-02 $ in Millions	Jan. 01, 2019 USD ($)
Entity Information [Line Items]
Lease asset	$ 110
Lease liability	110
Evergy Kansas Central Inc [Member]
Entity Information [Line Items]
Lease asset	40
Lease liability	40
Evergy Metro Inc [Member]
Entity Information [Line Items]
Lease asset	80
Lease liability	$ 80

FAIR VALUE MEASUREMENTS - Recurring (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Assets
Total nuclear decommissioning trust	$ 541.0	$ 472.1
Total rabbi trust	45.6	43.8
Total self-insured health plan trust	10.3	12.4
Total Assets	596.9	528.3
Liabilities
Total		5.4
Interest rate swaps
Liabilities
Interest rate swaps		5.4
Level 1
Assets
Total nuclear decommissioning trust	461.2	396.0
Total rabbi trust	0.7	0.2
Total self-insured health plan trust	5.5	8.8
Total Assets	467.4	405.0
Liabilities
Total		0.0
Level 1 \| Interest rate swaps
Liabilities
Interest rate swaps		0.0
Level 2
Assets
Total nuclear decommissioning trust	36.1	33.5
Total rabbi trust	0.0	0.0
Total self-insured health plan trust	4.8	3.6
Total Assets	40.9	37.1
Liabilities
Total		5.4
Level 2 \| Interest rate swaps
Liabilities
Interest rate swaps		5.4
Level 3
Assets
Total nuclear decommissioning trust	0.0	0.0
Total rabbi trust	0.0	0.0
Total self-insured health plan trust	0.0	0.0
Total Assets	0.0	0.0
Liabilities
Total		0.0
Level 3 \| Interest rate swaps
Liabilities
Interest rate swaps		0.0
NAV
Assets
Total nuclear decommissioning trust	43.7	42.6
Total rabbi trust	44.9	43.6
Total self-insured health plan trust	0.0	0.0
Total Assets	88.6	86.2
Liabilities
Total		0.0
NAV \| Interest rate swaps
Liabilities
Interest rate swaps		0.0
Evergy Kansas Central Inc [Member]
Assets
Total nuclear decommissioning trust	258.5	227.5
Total rabbi trust	31.8	30.6
Total Assets	290.3	258.1
Evergy Kansas Central Inc [Member] \| Core bond fund
Assets
Total nuclear decommissioning trust	36.6	37.5
Total rabbi trust	25.5	24.8
Evergy Kansas Central Inc [Member] \| High-yield bond fund
Assets
Total nuclear decommissioning trust	21.3	18.9
Evergy Kansas Central Inc [Member] \| Emerging markets bond fund
Assets
Total nuclear decommissioning trust	17.2	15.4
Evergy Kansas Central Inc [Member] \| Combination debt/equity/other fund
Assets
Total nuclear decommissioning trust	15.4	12.9
Total rabbi trust	6.1	5.6
Evergy Kansas Central Inc [Member] \| Alternative investments fund
Assets
Total nuclear decommissioning trust	24.8	24.1
Evergy Kansas Central Inc [Member] \| Real estate securities fund
Assets
Total nuclear decommissioning trust	12.4	11.8
Evergy Kansas Central Inc [Member] \| Cash equivalents
Assets
Total nuclear decommissioning trust	0.1	0.1
Total rabbi trust	0.2	0.2
Evergy Kansas Central Inc [Member] \| Level 1
Assets
Total nuclear decommissioning trust	214.8	184.9
Total rabbi trust	0.2	0.2
Total Assets	215.0	185.1
Evergy Kansas Central Inc [Member] \| Level 1 \| Core bond fund
Assets
Total nuclear decommissioning trust	36.6	37.5
Total rabbi trust	0.0	0.0
Evergy Kansas Central Inc [Member] \| Level 1 \| High-yield bond fund
Assets
Total nuclear decommissioning trust	21.3	18.9
Evergy Kansas Central Inc [Member] \| Level 1 \| Emerging markets bond fund
Assets
Total nuclear decommissioning trust	17.2	15.4
Evergy Kansas Central Inc [Member] \| Level 1 \| Combination debt/equity/other fund
Assets
Total nuclear decommissioning trust	15.4	12.9
Total rabbi trust	0.0	0.0
Evergy Kansas Central Inc [Member] \| Level 1 \| Alternative investments fund
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Kansas Central Inc [Member] \| Level 1 \| Real estate securities fund
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Kansas Central Inc [Member] \| Level 1 \| Cash equivalents
Assets
Total nuclear decommissioning trust	0.1	0.1
Total rabbi trust	0.2	0.2
Evergy Kansas Central Inc [Member] \| Level 2
Assets
Total nuclear decommissioning trust	0.0	0.0
Total rabbi trust	0.0	0.0
Total Assets	0.0	0.0
Evergy Kansas Central Inc [Member] \| Level 2 \| Core bond fund
Assets
Total nuclear decommissioning trust	0.0	0.0
Total rabbi trust	0.0	0.0
Evergy Kansas Central Inc [Member] \| Level 2 \| High-yield bond fund
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Kansas Central Inc [Member] \| Level 2 \| Emerging markets bond fund
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Kansas Central Inc [Member] \| Level 2 \| Combination debt/equity/other fund
Assets
Total nuclear decommissioning trust	0.0	0.0
Total rabbi trust	0.0	0.0
Evergy Kansas Central Inc [Member] \| Level 2 \| Alternative investments fund
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Kansas Central Inc [Member] \| Level 2 \| Real estate securities fund
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Kansas Central Inc [Member] \| Level 2 \| Cash equivalents
Assets
Total nuclear decommissioning trust	0.0	0.0
Total rabbi trust	0.0	0.0
Evergy Kansas Central Inc [Member] \| Level 3
Assets
Total nuclear decommissioning trust	0.0	0.0
Total rabbi trust	0.0	0.0
Total Assets	0.0	0.0
Evergy Kansas Central Inc [Member] \| Level 3 \| Core bond fund
Assets
Total nuclear decommissioning trust	0.0	0.0
Total rabbi trust	0.0	0.0
Evergy Kansas Central Inc [Member] \| Level 3 \| High-yield bond fund
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Kansas Central Inc [Member] \| Level 3 \| Emerging markets bond fund
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Kansas Central Inc [Member] \| Level 3 \| Combination debt/equity/other fund
Assets
Total nuclear decommissioning trust	0.0	0.0
Total rabbi trust	0.0	0.0
Evergy Kansas Central Inc [Member] \| Level 3 \| Alternative investments fund
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Kansas Central Inc [Member] \| Level 3 \| Real estate securities fund
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Kansas Central Inc [Member] \| Level 3 \| Cash equivalents
Assets
Total nuclear decommissioning trust	0.0	0.0
Total rabbi trust	0.0	0.0
Evergy Kansas Central Inc [Member] \| NAV
Assets
Total nuclear decommissioning trust	43.7	42.6
Total rabbi trust	31.6	30.4
Total Assets	75.3	73.0
Evergy Kansas Central Inc [Member] \| NAV \| Core bond fund
Assets
Total nuclear decommissioning trust	0.0	0.0
Total rabbi trust	25.5	24.8
Evergy Kansas Central Inc [Member] \| NAV \| High-yield bond fund
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Kansas Central Inc [Member] \| NAV \| Emerging markets bond fund
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Kansas Central Inc [Member] \| NAV \| Combination debt/equity/other fund
Assets
Total nuclear decommissioning trust	0.0	0.0
Total rabbi trust	6.1	5.6
Evergy Kansas Central Inc [Member] \| NAV \| Alternative investments fund
Assets
Total nuclear decommissioning trust	24.8	24.1
Evergy Kansas Central Inc [Member] \| NAV \| Real estate securities fund
Assets
Total nuclear decommissioning trust	12.4	11.8
Evergy Kansas Central Inc [Member] \| NAV \| Cash equivalents
Assets
Total nuclear decommissioning trust	0.0	0.0
Total rabbi trust	0.0	0.0
Evergy Kansas Central Inc [Member] \| Domestic \| Equity securities
Assets
Total nuclear decommissioning trust	84.0	70.6
Evergy Kansas Central Inc [Member] \| Domestic \| Level 1 \| Equity securities
Assets
Total nuclear decommissioning trust	77.5	63.9
Evergy Kansas Central Inc [Member] \| Domestic \| Level 2 \| Equity securities
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Kansas Central Inc [Member] \| Domestic \| Level 3 \| Equity securities
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Kansas Central Inc [Member] \| Domestic \| NAV \| Equity securities
Assets
Total nuclear decommissioning trust	6.5	6.7
Evergy Kansas Central Inc [Member] \| International \| Equity securities
Assets
Total nuclear decommissioning trust	46.7	36.2
Evergy Kansas Central Inc [Member] \| International \| Level 1 \| Equity securities
Assets
Total nuclear decommissioning trust	46.7	36.2
Evergy Kansas Central Inc [Member] \| International \| Level 2 \| Equity securities
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Kansas Central Inc [Member] \| International \| Level 3 \| Equity securities
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Kansas Central Inc [Member] \| International \| NAV \| Equity securities
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Metro Inc [Member]
Assets
Total nuclear decommissioning trust	282.5	244.6
Total self-insured health plan trust	10.3	12.4
Total Assets	292.8	257.0
Evergy Metro Inc [Member] \| Equity securities
Assets
Total nuclear decommissioning trust	193.7	166.6
Total self-insured health plan trust	0.5	0.5
Evergy Metro Inc [Member] \| Cash equivalents
Assets
Total nuclear decommissioning trust	2.6	1.7
Evergy Metro Inc [Member] \| U.S. Treasury
Assets
Total nuclear decommissioning trust	50.1	42.1
Evergy Metro Inc [Member] \| U.S. Agency
Assets
Total nuclear decommissioning trust	0.4	0.4
Evergy Metro Inc [Member] \| State and local obligations
Assets
Total nuclear decommissioning trust	2.2	2.1
Evergy Metro Inc [Member] \| Corporate bonds
Assets
Total nuclear decommissioning trust	33.0	30.9
Evergy Metro Inc [Member] \| Foreign governments
Assets
Total nuclear decommissioning trust	0.1	0.1
Evergy Metro Inc [Member] \| Other
Assets
Total nuclear decommissioning trust	0.4	0.7
Evergy Metro Inc [Member] \| Debt securities
Assets
Total self-insured health plan trust	6.1	3.9
Evergy Metro Inc [Member] \| Cash and cash equivalents
Assets
Total self-insured health plan trust	3.7	8.0
Evergy Metro Inc [Member] \| Level 1
Assets
Total nuclear decommissioning trust	246.4	211.1
Total self-insured health plan trust	5.5	8.8
Total Assets	251.9	219.9
Evergy Metro Inc [Member] \| Level 1 \| Equity securities
Assets
Total nuclear decommissioning trust	193.7	166.6
Total self-insured health plan trust	0.5	0.5
Evergy Metro Inc [Member] \| Level 1 \| Cash equivalents
Assets
Total nuclear decommissioning trust	2.6	1.7
Evergy Metro Inc [Member] \| Level 1 \| U.S. Treasury
Assets
Total nuclear decommissioning trust	50.1	42.1
Evergy Metro Inc [Member] \| Level 1 \| U.S. Agency
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Metro Inc [Member] \| Level 1 \| State and local obligations
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Metro Inc [Member] \| Level 1 \| Corporate bonds
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Metro Inc [Member] \| Level 1 \| Foreign governments
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Metro Inc [Member] \| Level 1 \| Other
Assets
Total nuclear decommissioning trust	0.0	0.7
Evergy Metro Inc [Member] \| Level 1 \| Debt securities
Assets
Total self-insured health plan trust	1.3	0.3
Evergy Metro Inc [Member] \| Level 1 \| Cash and cash equivalents
Assets
Total self-insured health plan trust	3.7	8.0
Evergy Metro Inc [Member] \| Level 2
Assets
Total nuclear decommissioning trust	36.1	33.5
Total self-insured health plan trust	4.8	3.6
Total Assets	40.9	37.1
Evergy Metro Inc [Member] \| Level 2 \| Equity securities
Assets
Total nuclear decommissioning trust	0.0	0.0
Total self-insured health plan trust	0.0	0.0
Evergy Metro Inc [Member] \| Level 2 \| Cash equivalents
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Metro Inc [Member] \| Level 2 \| U.S. Treasury
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Metro Inc [Member] \| Level 2 \| U.S. Agency
Assets
Total nuclear decommissioning trust	0.4	0.4
Evergy Metro Inc [Member] \| Level 2 \| State and local obligations
Assets
Total nuclear decommissioning trust	2.2	2.1
Evergy Metro Inc [Member] \| Level 2 \| Corporate bonds
Assets
Total nuclear decommissioning trust	33.0	30.9
Evergy Metro Inc [Member] \| Level 2 \| Foreign governments
Assets
Total nuclear decommissioning trust	0.1	0.1
Evergy Metro Inc [Member] \| Level 2 \| Other
Assets
Total nuclear decommissioning trust	0.4	0.0
Evergy Metro Inc [Member] \| Level 2 \| Debt securities
Assets
Total self-insured health plan trust	4.8	3.6
Evergy Metro Inc [Member] \| Level 2 \| Cash and cash equivalents
Assets
Total self-insured health plan trust	0.0	0.0
Evergy Metro Inc [Member] \| Level 3
Assets
Total nuclear decommissioning trust	0.0	0.0
Total self-insured health plan trust	0.0	0.0
Total Assets	0.0	0.0
Evergy Metro Inc [Member] \| Level 3 \| Equity securities
Assets
Total nuclear decommissioning trust	0.0	0.0
Total self-insured health plan trust	0.0	0.0
Evergy Metro Inc [Member] \| Level 3 \| Cash equivalents
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Metro Inc [Member] \| Level 3 \| U.S. Treasury
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Metro Inc [Member] \| Level 3 \| U.S. Agency
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Metro Inc [Member] \| Level 3 \| State and local obligations
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Metro Inc [Member] \| Level 3 \| Corporate bonds
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Metro Inc [Member] \| Level 3 \| Foreign governments
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Metro Inc [Member] \| Level 3 \| Other
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Metro Inc [Member] \| Level 3 \| Debt securities
Assets
Total self-insured health plan trust	0.0	0.0
Evergy Metro Inc [Member] \| Level 3 \| Cash and cash equivalents
Assets
Total self-insured health plan trust	0.0	0.0
Evergy Metro Inc [Member] \| NAV
Assets
Total nuclear decommissioning trust	0.0	0.0
Total self-insured health plan trust	0.0	0.0
Total Assets	0.0	0.0
Evergy Metro Inc [Member] \| NAV \| Equity securities
Assets
Total nuclear decommissioning trust	0.0	0.0
Total self-insured health plan trust	0.0	0.0
Evergy Metro Inc [Member] \| NAV \| Cash equivalents
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Metro Inc [Member] \| NAV \| U.S. Treasury
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Metro Inc [Member] \| NAV \| U.S. Agency
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Metro Inc [Member] \| NAV \| State and local obligations
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Metro Inc [Member] \| NAV \| Corporate bonds
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Metro Inc [Member] \| NAV \| Foreign governments
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Metro Inc [Member] \| NAV \| Other
Assets
Total nuclear decommissioning trust	0.0	0.0
Evergy Metro Inc [Member] \| NAV \| Debt securities
Assets
Total self-insured health plan trust	0.0	0.0
Evergy Metro Inc [Member] \| NAV \| Cash and cash equivalents
Assets
Total self-insured health plan trust	0.0	0.0
Other Evergy
Assets
Total rabbi trust	13.8	13.2
Liabilities
Total		5.4
Other Evergy \| Interest rate swaps
Liabilities
Interest rate swaps		5.4
Other Evergy \| Cash and cash equivalents
Assets
Total rabbi trust	0.5
Other Evergy \| Fixed income fund
Assets
Total rabbi trust	13.3	13.2
Other Evergy \| Level 1
Assets
Total rabbi trust	0.5	0.0
Liabilities
Total		0.0
Other Evergy \| Level 1 \| Interest rate swaps
Liabilities
Interest rate swaps		0.0
Other Evergy \| Level 1 \| Cash and cash equivalents
Assets
Total rabbi trust	0.5
Other Evergy \| Level 1 \| Fixed income fund
Assets
Total rabbi trust	0.0	0.0
Other Evergy \| Level 2
Assets
Total rabbi trust	0.0	0.0
Liabilities
Total		5.4
Other Evergy \| Level 2 \| Interest rate swaps
Liabilities
Interest rate swaps		5.4
Other Evergy \| Level 2 \| Cash and cash equivalents
Assets
Total rabbi trust	0.0
Other Evergy \| Level 2 \| Fixed income fund
Assets
Total rabbi trust	0.0	0.0
Other Evergy \| Level 3
Assets
Total rabbi trust	0.0	0.0
Liabilities
Total		0.0
Other Evergy \| Level 3 \| Interest rate swaps
Liabilities
Interest rate swaps		0.0
Other Evergy \| Level 3 \| Cash and cash equivalents
Assets
Total rabbi trust	0.0
Other Evergy \| Level 3 \| Fixed income fund
Assets
Total rabbi trust	0.0	0.0
Other Evergy \| NAV
Assets
Total rabbi trust	13.3	13.2
Liabilities
Total		0.0
Other Evergy \| NAV \| Interest rate swaps
Liabilities
Interest rate swaps		0.0
Other Evergy \| NAV \| Cash and cash equivalents
Assets
Total rabbi trust	0.0
Other Evergy \| NAV \| Fixed income fund
Assets
Total rabbi trust	$ 13.3	$ 13.2

LEASES Narrative (Details)	9 Months Ended
LEASES Narrative (Details)	Sep. 30, 2019
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	1 year
Minimum \| Evergy Kansas Central Inc [Member]
Lessee, Lease, Description [Line Items]
Remaining lease term	1 year
Minimum \| Evergy Metro Inc [Member]
Lessee, Lease, Description [Line Items]
Remaining lease term	2 years
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	20 years
Maximum \| Evergy Kansas Central Inc [Member]
Lessee, Lease, Description [Line Items]
Remaining lease term	20 years
Maximum \| Evergy Metro Inc [Member]
Lessee, Lease, Description [Line Items]
Remaining lease term	27 years