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ASSET RETIREMENT OBLIGATIONS (Tables)
12 Months Ended
Dec. 31, 2020
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Change in Asset Retirement Obligation
The following table summarizes the change in the Evergy Companies' AROs for the periods ending December 31, 2020 and 2019.
EvergyEvergy Kansas CentralEvergy Metro
202020192020201920202019
(millions)
Beginning balance January 1$674.1 $687.1 $272.9 $281.1 $253.6 $261.0 
Revision in timing and/or estimates249.3 (22.3)136.8 (12.4)118.4 (9.9)
Settlements(18.4)(17.8)(2.2)(14.8)(7.5)(2.5)
Accretion36.9 27.1 19.7 19.0 14.4 5.0 
Ending balance$941.9 $674.1 $427.2 $272.9 $378.9 $253.6 
Less: current portion(40.2)(71.3)(11.2)(23.3)(21.2)(36.1)
Total noncurrent asset
retirement obligation
$901.7 $602.8 $416.0 $249.6 $357.7 $217.5