COST OF SALES - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023
Disclosure of attribution of expenses by nature to their function [line items]
Cost of sales related to operating below normal capacity	$ 1,083.1	$ 863.0
Essakane Mine
Disclosure of attribution of expenses by nature to their function [line items]
Cost of sales related to operating below normal capacity	$ 0.0	$ 14.5

The amount of all expenses directly or indirectly attributed to the goods or services sold. Attributed expenses include, but are not limited to, costs previously included in the measurement of inventory that has now been sold, such as depreciation and maintenance of factory buildings and equipment used in the production process, unallocated production overheads, and abnormal amounts of production costs of inventories.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
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