v3.26.1
Finance Expense - Summary of Finance Expenses (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of attribution of expenses by nature to their function [line items]    
Interest expense $ (1.0) $ (4.1)
Interest income 14.8 12.6
Lease liability interest (i) (2.3) (1.4)
Accretion on reclamation provision (9.6) (8.9)
Deferred payment accretion (Note 7) 2.2 0.0
Other (i) 0.0 (2.0)
Finance expense (6.4) 3.8
Interest costs incurred 18.4 9.5
Mineral Property, Plant and Equipment    
Disclosure of attribution of expenses by nature to their function [line items]    
Lease liability interest (i) 0.0 (1.4)
Finance expense $ 24.9 $ 11.3