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FINANCIAL INSTRUMENTS - Narrative (Details)
$ in Millions
12 Months Ended
Dec. 31, 2023
USD ($)
$ / oz
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Disclosure of detailed information about financial instruments [line items]      
Cash and cash equivalents $ 367.1 $ 407.8 $ 544.9
Percentage of reasonably possible 10.00%    
Percentage of reasonably possible decrease 10.00%    
Gold floor price, per ounce (in usd per ounce) | $ / oz 1,700    
Gold cap price, per ounce (in usd per ounce) | $ / oz 2,100    
Gold option increase price, per ounce (in usd per ounce) | $ / oz 2,100    
Increase in fair value measurement due to reasonably possible increase in unobservable input, recognised in OCI $ 1.3    
Decrease in fair value measurement due to reasonably possible decrease in unobservable input, recognised in OCI 1.3    
Crude Oil Derivative Contracts      
Disclosure of detailed information about financial instruments [line items]      
Realized hedge losses recognized in profit or loss 1.1 $ 1.1  
Côté Gold UJV      
Disclosure of detailed information about financial instruments [line items]      
Cash and cash equivalents 81.7    
Essakane mine      
Disclosure of detailed information about financial instruments [line items]      
Cash and cash equivalents $ 70.9