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Mining interests (Tables) | 12 Months Ended
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Dec. 31, 2024
Disclosure of detailed information about property, plant and equipment [abstract] |
Schedule of property, plant and equipment |
Mining Properties |
| Depletable | Non- depletable | Plant & equipment | Construction in progress | Total |
(in millions of U.S. dollars) |  |  |  |  |  |
COST |  |  |  |  |  |
As at December 31, 2022 | 1,906.3 |  | 237.9 |  | 1,530.3 |  | 89.1 |  | 3,763.6 |  |
Additions | 45.0 |  | 147.9 |  | 17.1 |  | 100.2 |  | 310.2 |  |
Disposals | — |  | — |  | (9.0) |  | — |  | (9.0) |  |
Transfers(1) | 49.9 |  | (18.6) |  | 45.5 |  | (76.8) |  | — |  |
As at December 31, 2023 | 2,001.2 |  | 367.2 |  | 1,583.9 |  | 112.5 |  | 4,064.8 |  |
Additions | 106.5 |  | 18.0 |  | 51.4 |  | 71.5 |  | 247.4 |  |
Disposals | — |  | — |  | (7.0) |  | — |  | (7.0) |  |
Transfers(2) | 541.1 |  | (271.0) |  | (268.2) |  | (1.9) |  | — |  |
Disposal of mineral property interest(3) | (324.2) |  | (110.2) |  | (173.9) |  | — |  | (608.3) |  |
As at December 31, 2024 | 2,324.6 |  | 4.0 |  | 1,186.2 |  | 182.1 |  | 3,696.9 |  |
ACCUMULATED DEPRECIATION |  |  |  |  |  |
As at December 31, 2022 | 1,108.9 |  | — |  | 790.8 |  | — |  | 1,899.7 |  |
Depreciation for the year | 137.2 |  | — |  | 108.8 |  | — |  | 246.0 |  |
Disposals | — |  | — |  | (8.1) |  | — |  | (8.1) |  |
As at December 31, 2023 | 1,246.1 |  | — |  | 891.5 |  | — |  | 2,137.6 |  |
Depreciation for the year | 169.1 |  | — |  | 47.7 |  | — |  | 216.7 |  |
Disposals | — |  | — |  | (8.4) |  | — |  | (8.4) |  |
Disposal of mineral property interest(3) | (233.4) |  | — |  | (102.7) |  | — |  | (336.1) |  |
As at December 31, 2024 | 1,181.8 |  | — |  | 828.0 |  | — |  | 2,009.8 |  |
CARRYING AMOUNT |  |  |  |  |  |
As at December 31, 2023 | 755.1 |  | 367.2 |  | 692.4 |  | 112.5 |  | 1,927.2 |  |
As at December 31, 2024 | 1,142.8 |  | 4.0 |  | 358.2 |  | 182.1 |  | 1,687.1 |  |
1.In 2023, non-depletable transfers consisted of $18.6 million from the Rainy River Intrepid zone. 2.In 2024, transfers to depletable included $232.3 million related to C-Zone development as a result of achieving commercial production at C-Zone in October 2024. 3.In May 20 24, the Company entered into an Amending Agreement with Ontario Teachers which was determined to be a partial disposal of mineral property of a net book value of $272.2 million. Refer to Note 10 for further detail.
Schedule of segmented assets and liabilities | Carrying amount by property as at December 31, 2024
(in millions of U.S. dollars) | Depletable | Non- depletable | Plant & equipment | Construction in progress | Total
MINING INTEREST BY SITE |  |  |  |  |
New Afton | 684.6 |  | — |  | 78.1 |  | 81.1 |  | 843.8 |
Rainy River | 458.2 |  | 2.9 |  | 277.3 |  | 101.0 |  | 839.4 |
Other(1) | — |  | 1.1 |  | 2.8 |  | — |  | 3.9 |
Carrying amount | 1,142.8 |  | 4.0 |  | 358.2 |  | 182.1 |  | 1,687.1 |
1.Other includes Cerro San Pedro ("CSP") and corporate balances. Carrying amount by property as at December 31, 2023
(in millions of U.S. dollars) | Depletable | Non- depletable | Plant & equipment | Construction in progress | Total
MINING INTEREST BY SITE |  |  |  |  |
New Afton | 373.5 |  | 359.9 |  | 275.2 |  | 23.7 |  | 1,032.3 |
Rainy River | 381.6 |  | 6.2 |  | 413.8 |  | 88.8 |  | 890.4 |
Other(1) | — |  | 1.1 |  | 3.4 |  | — |  | 4.5 |
Carrying amount | 755.1 |  | 367.2 |  | 692.4 |  | 112.5 |  | 1,927.2 |
1.Other includes CSP and corporate balances.

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