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COMMITMENTS - Royalties in Cost of Sales (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Disclosure Of Commitments [Line Items]    
Royalties $ 94.2 $ 44.8
Aggregate continuing and discontinued operations    
Disclosure Of Commitments [Line Items]    
Royalties 94.2 44.8
Côté Gold | Discontinued operations    
Disclosure Of Commitments [Line Items]    
Royalties 19.4 0.0
Essakane mine    
Disclosure Of Commitments [Line Items]    
Royalties 74.5 44.6
Westwood    
Disclosure Of Commitments [Line Items]    
Royalties $ 0.3 $ 0.2