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ASSET RETIREMENT OBLIGATIONS (Tables)
 12 Months Ended
Dec. 31, 2019
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Change in Asset Retirement Obligation
The following table summarizes the change in the Evergy Companies' AROs.
 
 
Evergy
 
 
Evergy Kansas Central
 
 
Evergy Metro(a)
 
 
 
2019
 
 
2018
 
 
2019
 
 
2018
 
 
2019
 
 
2018
 
 
 
(millions)
 
Beginning balance
 
$
687.1

 
 
$
405.1

 
 
$
281.1

 
 
$
405.1

 
 
$
261.0

 
 
$
266.3

 
Liabilities assumed upon merger with Great Plains Energy
 
—

 
 
412.2

 
 
—

 
 
—

 
 
—

 
 
—

 
Liabilities incurred during the year
 
—

 
 
7.4

 
 
—

 
 
7.4

 
 
—

 
 
—

 
Revision in timing and/or estimates
 
(22.3
)
 
 
(150.1
)
 
 
(12.4
)
 
 
(138.7
)
 
 
(9.9
)
 
 
(11.4
)
 
Settlements
 
(17.8
)
 
 
(22.4
)
 
 
(14.8
)
 
 
(12.0
)
 
 
(2.5
)
 
 
(13.1
)
 
Accretion
 
27.1

 
 
34.9

 
 
19.0

 
 
19.3

 
 
5.0

 
 
19.2

 
Ending balance
 
$
674.1

 
 
$
687.1

 
 
$
272.9

 
 
$
281.1

 
 
$
253.6

 
 
$
261.0

 
Less: current portion
 
(71.3
)
 
 
(49.8
)
 
 
(23.3
)
 
 
(17.1
)
 
 
(36.1
)
 
 
(29.2
)
 
Total noncurrent asset retirement obligation
 
$
602.8

 
 
$
637.3

 
 
$
249.6

 
 
$
264.0

 
 
$
217.5

 
 
$
231.8

 

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