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Supplemental cash flow information (Tables) | 12 Months Ended
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Dec. 31, 2024
SUPPLEMENTAL CASH FLOW INFORMATION [Abstract] |
Schedule of supplemental cash flow information | Supplemental cash flow information (included within operating activities) is as follows:
|  | Year ended December 31
(in millions of U.S. dollars) |  |  | 2024 | 2023
CHANGE IN NON-CASH OPERATING WORKING CAPITAL |  |  |  |
Trade and other receivables |  |  | (8.8) |  | (4.1) |
Inventories |  |  | 2.8 |  | (6.5) |
Prepaid expenses and other |  |  | (8.3) |  | (1.8) |
Trade and other payables |  |  | (1.7) |  | 6.6 |
Total change in non-cash operating working capital |  |  | (16.0) |  | (5.8) |
|  | Year ended December 31
(in millions of U.S. dollars) |  |  | 2024 | 2023
OTHER NON-CASH ADJUSTMENTS |  |  |  |
Loss (gain) on revaluation of foreign exchange forward contracts and fuel hedge swap contracts |  |  | 7.4 |  | (1.4) |
Unrealized (gain) loss on provisionally priced concentrate contracts |  |  | (1.2) |  | 0.3 |
Equity settled share-based payment expense |  |  | 0.6 |  | 0.8 |
Gain on extinguishment of New Afton free cash flow obligation |  |  | (42.3) |  | — |
Loss on disposal of assets |  |  | 0.9 |  | 0.3 |
Unrealized loss on revaluation of non-current derivative financial instruments |  |  | 130.6 |  | 108.1 |
Loss on revaluation of CSP’s reclamation and closure cost obligation |  |  | — |  | 0.5 |
Inventory net realizable value (write-up) write-down (Note 7) |  |  | (16.4) |  | 0.7 |
Loss on revaluation of investments |  |  | 0.9 |  | 4.4 |
Total other non-cash adjustments |  |  | 80.6 |  | 113.7 |

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