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Non-Controlling Interests - Summary of Information About Subsidiaries with Non-controlling Interests and Non-controlling Interest Balances (Detail) - CAD ($)
$ in Millions
12 Months Ended
Mar. 29, 2019
Dec. 31, 2023
Dec. 31, 2019
Dec. 31, 2022
Disclosure of subsidiaries [line items]        
Non-controlling interests   $ 1,304   $ 1,038
Carmen de Andacollo        
Disclosure of subsidiaries [line items]        
Percentage of ownership interests held by non-controlling interests   10.00%    
Percentage of Voting Rights Held by Non-Controlling Interest   10.00%    
Non-controlling interests   $ 18   26
Elkview Mine Limited Partnership        
Disclosure of subsidiaries [line items]        
Percentage of ownership interests held by non-controlling interests   5.00%    
Percentage of Voting Rights Held by Non-Controlling Interest   5.00%    
Non-controlling interests   $ 126   87
Compañía Minera Zafranal S.A.C.        
Disclosure of subsidiaries [line items]        
Percentage of ownership interests held by non-controlling interests   20.00%    
Percentage of Voting Rights Held by Non-Controlling Interest   20.00%    
Non-controlling interests   $ 56   51
Quebrada Blanca        
Disclosure of subsidiaries [line items]        
Percentage of ownership interests held by non-controlling interests   40.00%    
Percentage of Voting Rights Held by Non-Controlling Interest   40.00%    
Non-controlling interests   $ 1,104   $ 874
Quebrada Blanca | SSM/SC        
Disclosure of subsidiaries [line items]        
Portion of additional interest acquired 30.00%      
Quebrada Blanca | ENAMI        
Disclosure of subsidiaries [line items]        
Percentage of ownership interests held by non-controlling interests     10.00%