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DISCONTINUED OPERATIONS - Narrative (Details) - Discontinued operations - Rosebel Mine - USD ($) $ in Millions |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jan. 31, 2023 | Oct. 18, 2022 | Jun. 30, 2023 | Dec. 31, 2022
Disclosure of analysis of single amount of discontinued operations [line items] |  |  |  |
Ownership interest |  | 95.00% |  |
Impairment charge |  |  |  | $ 110.1
Post-tax impairment charge |  |  |  | $ 70.5
Disposal of major subsidiary |  |  |  |
Disclosure of analysis of single amount of discontinued operations [line items] |  |  |  |
Portion of consideration paid (received) consisting of cash and cash equivalents and working capital adjustment | $ 396.0 |  |  |
Proceeds received on closing | 360.0 |  |  |
Cash and cash equivalents transferred since closing | 39.4 |  |  |
Proceeds from sales of interests in working capital adjustment | 3.4 |  |  |
Loss on sale of Rosebel | $ 7.4 |  | $ 7.4 |

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