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v3.22.1

Basis of preparation and significant accounting policies - Additional information (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Mar. 31, 2025
Ontario Teachers' Pension Plan | New Afton |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Free cash flow interest in New Afton | 46.00% | 42.50%
Plant and machinery | Bottom of range |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Useful life measured as period of time, property, plant and equipment | 3 years |
Plant and machinery | Top of range |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Useful life measured as period of time, property, plant and equipment | 9 years |
Mobile equipment | Bottom of range |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Useful life measured as period of time, property, plant and equipment | 5 years |
Mobile equipment | Top of range |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Useful life measured as period of time, property, plant and equipment | 7 years |

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