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UNINCORPOATED ARRANGEMENT SMM FUNDING ARRANGEMENT - Narrative (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Nov. 30, 2024 | Dec. 31, 2024 | Dec. 31, 2023
Disclosure of associates [line items] |  |  |
Funding obligations contributed by SMM |  | $ 0.0 | $ 250.0
Repurchase of Transferred Interests | $ 377.7 | (377.7) | 0.0
Repurchase option fee included in repurchase price |  | $ 17.5 | 23.7
Côté Gold |  |  |
Disclosure of associates [line items] |  |  |
Proportion of voting rights held in joint venture |  | 70.00% |
Proportion of revenue and expenses | 60.30% |  |
Proportion of revenue and expenses included in interest income, derivatives and other investment gains (losses) | 9.70% |  |
Sumitomo Metal Mining Co Ltd |  |  |
Disclosure of associates [line items] |  |  |
Increased ownership interest in joint venture |  | 9.70% |
Unincorporated Joint Venture |  |  |
Disclosure of associates [line items] |  |  |
Proportion of voting rights held in joint venture |  | 70.00% |
Unincorporated Joint Venture | Sumitomo Metal Mining Co Ltd |  |  |
Disclosure of associates [line items] |  |  |
Funding obligation to Cote Gold by SMM |  |  | $ 250.0

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