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INTEREST INCOME, DERIVATIVES AND OTHER INVESTMENT GAINS (LOSSES) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Analysis of income and expense [abstract] |  |
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 gains related to flow-through common shares | 1.1 | 0.0
9.7% of Côté Gold pre-Commercial Production gold received by SMM | 18.4 | 0.0
9.7% of Côté Gold expenses funded by SMM | (6.6) | 0.0
Gain on sale of Pitangui and Acurui Projects | 0.0 | 15.5
Fair value of deferred consideration from the sale of Sadiola | 1.8 | (4.3)
Other gains (losses) | (3.3) | 1.0
Interest income, derivatives and other investment gains (losses) | $ 70.9 | $ 53.2

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