XML 118 R94.htm IDEA: XBRL DOCUMENT v3.24.0.1
INVENTORIES - Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Disclosure of Inventories [Line Items]    
Cost of sales $ 863.0 $ 810.9
Forfeiture of carbon fines 13.5 0.0
Finished Goods    
Disclosure of Inventories [Line Items]    
Inventory write-down 1.7 6.7
Ore Stockpiles - Current    
Disclosure of Inventories [Line Items]    
Inventory write-down 1.7 2.1
Ore Stockpiles - Non-Current    
Disclosure of Inventories [Line Items]    
Inventory write-down 0.0  
Reversal of inventory write-down   17.0
Mine Supplies    
Disclosure of Inventories [Line Items]    
Inventory write-down $ 2.5 $ 2.4