Other (Loss) Gain (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Disclosure of other gains and losses [Line Items] | ||
| Loss on disposal of assets | $ 3.9 | $ 10.6 |
| Write down of miscellaneous receivables | 0.0 | (4.7) |
| Revision to reclamation for closed sites | (0.6) | (0.2) |
| Other | (2.4) | (2.7) |
| Other loss | (9.6) | (39.7) |
| Maintenance And Arbitration Costs | (2.7) | (6.5) |
| Silver Stream | ||
| Disclosure of other gains and losses [Line Items] | ||
| Gain (loss) on fair value adjustment | 0.0 | (9.3) |
| Milestone Payments | ||
| Disclosure of other gains and losses [Line Items] | ||
| Fair value adjustment on contingent consideration | $ 0.0 | $ (5.7) |