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Inventory (Tables)
12 Months Ended
Dec. 31, 2020
Disclosure of inventories [Abstract]  
Schedule of Inventory
December 31, 2020December 31, 2019
In-process precious metals
$72.7 $59.0 
Ore in stockpiles
30.8 33.4 
Parts and supplies
53.0 49.2 
Dore, and refined precious metals9.9 11.0 
166.4 152.6 
Less: Long-term inventory
(17.9)(25.7)
$148.5 $126.9