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PROVISIONS - Narrative (Details)
$ in Millions, $ in Millions, XOF in Billions
Dec. 26, 2023
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2023
XOF
Dec. 31, 2023
CAD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2022
XOF
Dec. 31, 2022
CAD ($)
Disclosure of other provisions [line items]              
Restricted cash   $ 90.5     $ 56.3    
Losses on litigation settlements $ 15.0            
Carrying value of forfeited inventory $ 13.5            
Letters of credit              
Disclosure of other provisions [line items]              
Long-term debt   118.9          
Doyon division including the Westwood mine1              
Disclosure of other provisions [line items]              
Bonds outstanding to guarantee asset retirement obligations   126.7   $ 167.4 123.7   $ 167.4
Côté Gold Project              
Disclosure of other provisions [line items]              
Bonds outstanding to guarantee asset retirement obligations   25.8   34.0 35.8   48.4
Doyon and Côté Gold              
Disclosure of other provisions [line items]              
Bonds outstanding to guarantee asset retirement obligations   152.5   201.4 159.5   215.8
Doyon and Côté Gold | Cash Collateral              
Disclosure of other provisions [line items]              
Bonds outstanding to guarantee asset retirement obligations   11.0     10.9    
Doyon and Côté Gold | Letters of credit              
Disclosure of other provisions [line items]              
Bonds outstanding to guarantee asset retirement obligations   22.6   $ 29.8 18.4   $ 24.9
Essakane mine              
Disclosure of other provisions [line items]              
Restricted cash   $ 52.6 XOF 31.2   $ 45.3 XOF 27.8