XML 65 R46.htm IDEA: XBRL DOCUMENT v3.24.0.1
Inventory (Narrative) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Disclosure of inventories [Line Items]    
Mining and processing costs, inventories $ 448.4 $ 400.5
Amortization 190.2 171.5
Amortization costs, inventories   171.5
In-process precious metals inventories to be realized after more than one year 58.0  
Inventory net realizable value adjustment $ 0.0 33.9
Mining and Processing Costs    
Disclosure of inventories [Line Items]    
Inventory net realizable value adjustment   27.6
Amortization    
Disclosure of inventories [Line Items]    
Inventory net realizable value adjustment   $ 6.3