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ASSETS AND LIABILITIES HELD FOR SALE - Narrative (Details) - USD ($) $ in Millions |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 23, 2024 | Apr. 25, 2023 | Dec. 20, 2022 | Dec. 31, 2024 | Dec. 31, 2023
Disclosure of analysis of single amount of discontinued operations [line items] |  |  |  |  |
Pre-tax gain on sale of Senegal Assets |  |  |  | $ 0.0 | $ 6.3
Senegal Assets |  |  |  |  |
Disclosure of analysis of single amount of discontinued operations [line items] |  |  |  |  |
Gross cash proceeds |  | $ 197.6 |  |  |
Non-controlling ownership interest |  | 10.00% |  |  |
Guinea Assets |  |  |  |  |
Disclosure of analysis of single amount of discontinued operations [line items] |  |  |  |  |
Gross cash proceeds | $ 35.5 |  |  |  |
Discontinued operations |  |  |  |  |
Disclosure of analysis of single amount of discontinued operations [line items] |  |  |  |  |
Pre-tax gain on sale of Senegal Assets |  |  |  |  | $ 6.3
Discontinued operations | Bambouk |  |  |  |  |
Disclosure of analysis of single amount of discontinued operations [line items] |  |  |  |  |
Gross cash proceeds |  |  | $ 282.0 |  |
Consideration to be received |  |  | $ 282.0 |  |
Discontinued operations | Boto Gold Project |  |  |  |  |
Disclosure of analysis of single amount of discontinued operations [line items] |  |  |  |  |
Ownership interest |  | 90.00% | 90.00% |  |
Discontinued operations | Senegal Assets |  |  |  |  |
Disclosure of analysis of single amount of discontinued operations [line items] |  |  |  |  |
Ownership interest |  | 100.00% | 100.00% |  |
Pre-tax gain on sale of Senegal Assets |  | $ 109.1 |  |  |
Discontinued operations | Guinea Assets |  |  |  |  |
Disclosure of analysis of single amount of discontinued operations [line items] |  |  |  |  |
Ownership interest | 100.00% |  |  |  |
Purchase price adjustment | $ (8.1) |  |  |  |
Net proceeds and pre-tax gain on sale of Guinea Assets | $ 34.1 |  |  |  |

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