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Derivative instruments (Tables) | 12 Months Ended
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Dec. 31, 2024
Financial Instruments [Abstract] |
Schedule of derivative assets and derivative liabilities |
| As at December 31 | As at December 31
(in millions of U.S. dollars) | 2024 | 2023
DERIVATIVE ASSETS (LIABILITIES) |  |
Foreign exchange forward contracts(1) | (5.3) |  | 3.2 |
Fuel hedge swap contracts(2) | 0.1 |  | (1.1) |
Unsettled provisionally priced concentrate derivatives, and swap contracts(3) | 1.2 |  | (0.3) |
1.Foreign exchange forward contracts are included within trade and other payables in the statement of financial position. 2.Fuel hedge swap contracts are included within prepaid expenses and other in the statement of financial position. 3.Unsettled provisionally priced concentrate derivatives are included within trade and other receivables in the statement of financial position.
Schedule of realised and unrealised gains (losses) on provisionally priced sales | The following tables summarize the realized and unrealized gains (losses) on provisionally priced sales:
|  | Year ended December 31, 2024
(in millions of U.S. dollars) |  |  |  | Gold | Copper | Total
GAIN (LOSS) ON THE PROVISIONAL PRICING OF CONCENTRATE SALES |  |  |  |  |  |
Realized |  |  |  | 8.3 |  | 4.7 |  | 13.0 |
Unrealized |  |  |  | — |  | (0.5) |  | (0.5) |
Total gain |  |  |  | 8.3 |  | 4.2 |  | 12.5 |
|  | Year ended December 31, 2023
(in millions of U.S. dollars) |  |  |  | Gold | Copper | Total
GAIN (LOSS) ON THE PROVISIONAL PRICING OF CONCENTRATE SALES |  |  |  |  |  |
Realized |  |  |  | 1.5 |  | 0.6 |  | 2.1 |
Unrealized |  |  |  | 0.4 |  | 0.2 |  | 0.6 |
Total gain |  |  |  | 1.9 |  | 0.8 |  | 2.7 |
Schedule of realised and unrealised gains (losses) on gold and copper swap contracts | The following tables summarize the realized and unrealized gains (losses) on gold and copper swap contracts:
|  | Year ended December 31, 2024
(in millions of U.S. dollars) |  |  |  | Gold | Copper | Total
GAIN (LOSS) ON SWAP CONTRACTS |  |  |  |  |  |
Realized |  |  |  | (6.4) |  | (2.6) |  | (9.0) |
Unrealized |  |  |  | 0.5 |  | 1.2 |  | 1.7 |
Total loss |  |  |  | (5.9) |  | (1.4) |  | (7.3) |
|  | Year ended December 31, 2023
(in millions of U.S. dollars) |  |  |  | Gold | Copper | Total
GAIN (LOSS) ON SWAP CONTRACTS |  |  |  |  |  |
Realized |  |  |  | (1.2) |  | 0.5 |  | (0.7) |
Unrealized |  |  |  | (0.4) |  | (0.5) |  | (0.9) |
Total loss |  |  |  | (1.6) |  | — |  | (1.6) |
Schedule of impact of movements in market commodity prices | The following table summarizes the net exposure to the impact of movements in market commodity prices for provisionally priced sales:
| As at December 31 | As at December 31
| 2024 | 2023
VOLUMES SUBJECT TO FINAL PRICING NET OF OUTSTANDING SWAPS |  |
Gold ounces (000s) | 0.8 |  | — |
Copper pounds (millions) | 0.4 |  | — |

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