XML 180 R93.htm IDEA: XBRL DOCUMENT v3.22.4
Asset Retirement Obligations (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Asset Retirement Obligation Disclosure [Abstract]      
Asset retirement obligations, beginning of period $ 1,749.3 $ 1,393.9  
Liabilities incurred 14.9 20.2  
Liabilities settled (205.6) (163.1)  
Accretion expense 81.6 71.9 $ 68.0
Revisions in estimated cash flows 264.5 443.3  
Foreign currency translation 0.9 (16.9)  
Asset retirement obligations, end of period 1,905.6 1,749.3 $ 1,393.9
Less current portion 212.3 222.4  
Asset retirement obligations $ 1,693.3 $ 1,526.9