XML 69 R60.htm IDEA: XBRL DOCUMENT v3.22.2
ASSET RETIREMENT OBLIGATIONS (Asset Retirement Obligations Operating Costs) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
ASSET RETIREMENT OBLIGATIONS [Abstract]        
Accretion $ 3.6 $ 3.2 $ 7.1 $ 6.5
Depreciation 2.4 2.7 4.8 5.3
Total $ 6.0 $ 5.9 $ 11.9 $ 11.8