XML 84 R53.htm IDEA: XBRL DOCUMENT v3.23.1
Mineral Property, Plant and Equipment (Net Value Carrying Values) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Disclosure of detailed information about property, plant and equipment [line items]    
Mineral property, plant and equipment $ 3,173.8 $ 3,108.5
Plant and equipment    
Disclosure of detailed information about property, plant and equipment [line items]    
Mineral property, plant and equipment 980.5 911.5
Depletable    
Disclosure of detailed information about property, plant and equipment [line items]    
Mineral property, plant and equipment 1,899.5 1,819.4
Non-depletable    
Disclosure of detailed information about property, plant and equipment [line items]    
Mineral property, plant and equipment 126.9 143.2
Exploration and evaluation    
Disclosure of detailed information about property, plant and equipment [line items]    
Mineral property, plant and equipment 166.9 234.4
Corporate and other    
Disclosure of detailed information about property, plant and equipment [line items]    
Mineral property, plant and equipment 150.7 217.8
Corporate and other | Plant and equipment    
Disclosure of detailed information about property, plant and equipment [line items]    
Mineral property, plant and equipment 3.6 3.2
Corporate and other | Depletable    
Disclosure of detailed information about property, plant and equipment [line items]    
Mineral property, plant and equipment 0.0 0.0
Corporate and other | Non-depletable    
Disclosure of detailed information about property, plant and equipment [line items]    
Mineral property, plant and equipment 0.0 0.0
Corporate and other | Exploration and evaluation    
Disclosure of detailed information about property, plant and equipment [line items]    
Mineral property, plant and equipment 147.1 214.6
Operating segments | Young-Davidson    
Disclosure of detailed information about property, plant and equipment [line items]    
Mineral property, plant and equipment 1,504.7 1,520.6
Operating segments | Young-Davidson | Plant and equipment    
Disclosure of detailed information about property, plant and equipment [line items]    
Mineral property, plant and equipment 663.2 686.8
Operating segments | Young-Davidson | Depletable    
Disclosure of detailed information about property, plant and equipment [line items]    
Mineral property, plant and equipment 841.5 833.8
Operating segments | Young-Davidson | Non-depletable    
Disclosure of detailed information about property, plant and equipment [line items]    
Mineral property, plant and equipment 0.0 0.0
Operating segments | Young-Davidson | Exploration and evaluation    
Disclosure of detailed information about property, plant and equipment [line items]    
Mineral property, plant and equipment 0.0 0.0
Operating segments | Island Gold    
Disclosure of detailed information about property, plant and equipment [line items]    
Mineral property, plant and equipment 1,174.6 1,035.8
Operating segments | Island Gold | Plant and equipment    
Disclosure of detailed information about property, plant and equipment [line items]    
Mineral property, plant and equipment 114.5 115.4
Operating segments | Island Gold | Depletable    
Disclosure of detailed information about property, plant and equipment [line items]    
Mineral property, plant and equipment 939.8 876.4
Operating segments | Island Gold | Non-depletable    
Disclosure of detailed information about property, plant and equipment [line items]    
Mineral property, plant and equipment 100.5 24.2
Operating segments | Island Gold | Exploration and evaluation    
Disclosure of detailed information about property, plant and equipment [line items]    
Mineral property, plant and equipment 19.8 19.8
Operating segments | Mulatos1    
Disclosure of detailed information about property, plant and equipment [line items]    
Mineral property, plant and equipment 343.8 334.3
Operating segments | Mulatos1 | Plant and equipment    
Disclosure of detailed information about property, plant and equipment [line items]    
Mineral property, plant and equipment 199.2 106.1
Operating segments | Mulatos1 | Depletable    
Disclosure of detailed information about property, plant and equipment [line items]    
Mineral property, plant and equipment 118.2 109.2
Operating segments | Mulatos1 | Non-depletable    
Disclosure of detailed information about property, plant and equipment [line items]    
Mineral property, plant and equipment 26.4 119.0
Operating segments | Mulatos1 | Exploration and evaluation    
Disclosure of detailed information about property, plant and equipment [line items]    
Mineral property, plant and equipment $ 0.0 $ 0.0