Other (Loss) Gain (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Disclosure of other gains and losses [Line Items] | ||
| Holding and Arbitration Costs | $ (6.5) | $ (2.9) |
| Loss on disposal of assets | 10.6 | 1.9 |
| Write down of miscellaneous receivables | (4.7) | 0.0 |
| Revision to reclamation for closed sites | (0.2) | (3.3) |
| Other | (2.7) | (1.4) |
| Other loss | (39.7) | (22.9) |
| Silver Stream | ||
| Disclosure of other gains and losses [Line Items] | ||
| Gain (loss) on fair value adjustment | (9.3) | 0.0 |
| Milestone Payments | ||
| Disclosure of other gains and losses [Line Items] | ||
| Fair value adjustment on contingent consideration | $ (5.7) | $ (13.4) |