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Production Costs (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Analysis of income and expense [abstract]    
Materials and consumables $ 604.7 $ 539.0
Salaries and employee benefits 531.1 471.7
Contractors 392.5 341.2
Utilities 75.0 65.8
Insurance 21.1 22.6
Other expense 52.9 31.6
Changes in inventories (43.5) 7.3
Production costs $ 1,633.8 $ 1,479.2