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INTEREST INCOME, DERIVATIVES AND OTHER INVESTMENT GAINS (LOSSES) (Tables) | 12 Months Ended
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Dec. 31, 2024
Analysis of income and expense [abstract] |
Schedule of Interest Income and Derivatives and Other Investment Gains (Losses) |
|  |  | Years ended December 31,
| Notes |  |  | 2024 | 2023
Interest income |  |  |  | $ | 16.1 |  | $ | 27.8 |
Insurance recoveries |  |  |  | 27.3 |  | 0.6 |
Gains (losses) on non-hedge derivatives and warrants |  |  |  | 16.1 |  | 12.6 |
Amortization of gain related to flow-through common shares |  |  |  | 1.1 |  | — |
9.7% of Côté Gold pre-Commercial Production gold received by SMM | 8 |  |  | 18.4 |  | — |
9.7% of Côté Gold expenses funded by SMM |  |  |  | (6.6) |  | — |
Gain on sale of Pitangui and Acurui Projects |  |  |  | — |  | 15.5 |
Fair value of deferred consideration from the sale of Sadiola |  |  |  | 1.8 |  | (4.3) |
Other gains (losses) |  |  |  | (3.3) |  | 1.0 |
|  |  |  | $ | 70.9 |  | $ | 53.2 |

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