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Production Costs (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Production Costs [Line Items]    
Materials and consumables $ 548.0 $ 414.3
Salaries and employee benefits 479.6 310.7
Contractors 346.2 232.1
Utilities 66.9 56.2
Insurance 23.0 17.2
Other expense 8.2 13.6
Changes in inventories 7.3 50.3
Production costs 1,479.2 1,094.4
Net realizable value inventory (recovery) charge (31.8) $ 97.7
Yamana    
Production Costs [Line Items]    
Inventory, acquisition date fair value adjustments $ 41.1