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PROVISIONS - Narrative (Details)
$ in Millions, $ in Millions, XOF in Billions
Dec. 26, 2023
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2024
XOF
Dec. 31, 2024
CAD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2023
XOF
Dec. 31, 2023
CAD ($)
Disclosure of other provisions [line items]              
Restricted cash   $ 68.4     $ 90.5    
Losses on litigation settlements $ 15.0            
Carrying value of forfeited inventory $ 13.5            
Letters of credit              
Disclosure of other provisions [line items]              
Uncollateralized surety bonds   159.2          
Westwood division              
Disclosure of other provisions [line items]              
Bonds outstanding to guarantee asset retirement obligations   142.5   $ 205.3 126.7   $ 167.4
Côté Gold Project              
Disclosure of other provisions [line items]              
Bonds outstanding to guarantee asset retirement obligations   35.0   50.4 25.8   34.0
Westwood and Côté Gold | Letters of credit              
Disclosure of other provisions [line items]              
Bonds outstanding to guarantee asset retirement obligations   7.4   $ 10.6 22.6   $ 29.8
Westwood and Côté Gold | Cash Collateral              
Disclosure of other provisions [line items]              
Bonds outstanding to guarantee asset retirement obligations   10.9     10.9    
Essakane mine              
Disclosure of other provisions [line items]              
Restricted cash   $ 54.6 XOF 34.6   $ 52.6 XOF 31.2