Gold and Silver Bullion and Stream Inventory - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Gold and Silver Bullion and Stream Inventory | ||||
| Cost of gold and silver bullion from royalties received in kind | $ 104.9 | $ 4.8 | $ 128.0 | $ 14.1 |
| Gross proceeds from sale of gold and silver | 147.1 | 5.9 | 177.3 | 16.6 |
| Gain on sale of gold and silver bullion | $ 42.2 | $ 1.1 | $ 49.3 | $ 2.5 |