v3.26.1
Decommissioning Liabilities (Tables)
12 Months Ended
Dec. 31, 2025
Asset Retirement Obligation Disclosure1 [Abstract]  
Schedule of Change in Asset Retirement Obligation
Current and non-current portion December 31, 2023$136.8
Liability assumed on Argonaut acquisition (Note 6)
18.0 
Reclamation expenditures(10.6)
Accretion expense8.9 
Revisions to expected discounted cash flows1
2.8
Foreign exchange revaluation(4.3)
Current and non-current portion December 31, 2024$151.6
Reclamation expenditures(12.2)
Accretion expense9.6 
Revisions to expected discounted cash flows1
11.2
Foreign exchange revaluation1.3 
Current and non-current portion December 31, 2025$161.5
Less: Current portion of decommissioning liability (8.1)
Non-current portion December 31, 2025$153.4
1. Included in the revisions to expected discounted cash flows for the year ended December 31, 2025 are costs of $0.6 million related to closed sites with a corresponding expense recorded in Other Loss (Note 21) (year ended December 31, 2024 - $0.2 million).