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UNINCORPOATED ARRANGEMENT SMM FUNDING ARRANGEMENT - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Sumitomo Metal Mining Co Ltd |  |
Disclosure of associates [line items] |  |
Increased ownership interest in joint venture | 9.70% |
Transferred ownership interest | 9.70% |
Unincorporated Joint Venture |  |
Disclosure of associates [line items] |  |
Proportion of voting rights held in joint venture | 70.00% |
Unincorporated Joint Venture | Côté Gold [Member] |  |
Disclosure of associates [line items] |  |
Proportion of voting rights held in joint venture | 70.00% | 70.00%
Unincorporated Joint Venture | Sumitomo Metal Mining Co Ltd |  |
Disclosure of associates [line items] |  |
Contributions in relation to joint ventures | $ 250.0 |
Incremental funding due to increased ownership | $ 77.1 |

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