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Provisions (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Disclosure of other provisions [line items]    
Provisions, beginning $ 303.2  
Provisions, ending 474.0 $ 303.2
Closure and decommissioning    
Disclosure of other provisions [line items]    
Provisions, beginning 296.2 242.9
Increase from Acquisition 244.0 0.0
Dispositions (Note 9) (129.9) 0.0
Revisions in estimates and obligations 29.9 42.7
Expenditures (27.3) (4.2)
Accretion expense (Note 26) 34.2 14.8
Provisions, ending 447.1 296.2
Litigation    
Disclosure of other provisions [line items]    
Provisions, beginning 7.0  
Increase from Acquisition 34.6 0.0
Dispositions (Note 9) (18.2) 0.0
Provisions, ending $ 10.5 $ 7.0