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COST OF SALES (Tables)
12 Months Ended
Dec. 31, 2021
Analysis of income and expense [abstract]  
Components of cost of sales
Years ended December 31,
20212020
Operating costs1
$748.6 $675.5 
Royalties 60.6 59.2 
Depreciation expense2
339.8 256.7 
$1,149.0 $991.4 
1.Operating costs include mine production, transport and smelter costs, and site administrative expenses.
2.Depreciation expense excludes depreciation related to corporate office assets, which is included in general and administrative expenses.