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BUSINESS TRANSACTIONS - Additional Information (Details)
$ in Millions, $ in Millions
2 Months Ended 12 Months Ended
Jan. 15, 2021
USD ($)
Jan. 15, 2021
CAD ($)
May 24, 2018
Jun. 16, 2014
Mar. 10, 2020
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Disclosure of detailed information about business combination [line items]              
Impairment loss           $ (191.0) $ 0.0
Consideration, purchase warrants $ 4.2 $ 5.5          
Disposal Brio Gold Inc.              
Disclosure of detailed information about business combination [line items]              
Proportion of ownership interest in subsidiary     53.60%        
Canadian Malartic              
Disclosure of detailed information about business combination [line items]              
Proportion of ownership interest in joint operation       50.00%   50.00% 50.00%
Leagold Mining Corporation              
Disclosure of detailed information about business combination [line items]              
Proportion of ownership interest in associate     20.50%   20.00%    
Proportion of ownership interest in associate     20.50%   20.00%