v3.26.1
Non-Controlling Interest (Schedule of summarized income statement and comprehensive income) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of Non-Controlling Interest [Line Items]    
Total revenue $ 2,211.0 $ 2,021.2
Mine operating costs 1,028.1 1,040.8
Depreciation and amortization 441.2 428.0
Gross profit 743.2 553.8
Other expenses 7.8 57.4
Other net finance (income) expenses (8.3) 38.1
Tax recovery 347.7 183.8
Net loss for the year 564.3 67.8
Total comprehensive loss 597.2 44.8
Copper Mountain Mine [Member]    
Disclosure of Non-Controlling Interest [Line Items]    
Total revenue 76.5 274.1
Mine operating costs 56.5 210.8
Depreciation and amortization 16.5 50.1
Gross profit 3.5 13.2
Other expenses 2.6 20.2
Finance expense - related parties 14.4 31.3
Other net finance (income) expenses 5.3 16.6
Tax recovery (2.0) (19.4)
Net loss for the year (16.8) (35.5)
Total comprehensive loss $ (4.0) $ (63.1)