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Cost of Sales (Tables)
 12 Months Ended
Dec. 31, 2025
Analysis of income and expense [abstract]  
Components of cost of sales
Years ended December 31,
Notes20252024
Operating costs1
$1,027.8 $715.1 
Royalties36(b)197.9 94.2 
Depreciation expense420.9 273.8 
$1,646.6 $1,083.1 
1.Operating costs include mine production, transport and smelter costs, and site administrative expenses.