v3.26.1
Income and mining taxes (Schedule of reconciliation to statutory tax rate) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Major components of tax expense (income) [abstract]    
Income before tax $ 912.0 $ 251.6
Statutory tax rate 26.70% 26.70%
Tax expense at statutory rate $ 243.5 $ 67.2
Effect of: Deductions related to mining taxes (24.2) (16.3)
Adjusted income taxes 219.3 50.9
Mining tax expense 76.9 50.0
Adjusted income tax expense after mining tax expense (recovery) 296.2 100.9
Permanent differences related to: Capital items (7.4) 0.5
Permanent differences related to: Other income tax permanent differences (0.8) 4.1
Withholding tax on dividends 9.0 1.8
Impact of remeasurement on decommissioning liability (1.7) 6.5
Temporary income tax differences (recognized)/not recognized (5.4) 8.3
Recognition of previously unrecognized deferred tax assets (2.4) 0.0
Impact related to differences in tax rates in foreign operations 71.6 36.7
Impact of changes to statutory tax rates 0.0 (4.4)
Effect of flow through shares 4.3 3.9
Foreign exchange on non-monetary items (15.4) 26.2
Impact related to tax assessments and tax return amendments 0.4 (1.2)
Other (0.7) 0.5
Tax expense $ 347.7 $ 183.8