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Material Accounting Policy Information - Additional Information (Details)
12 Months Ended
Feb. 02, 2023
Dec. 31, 2024
Dec. 31, 2022
PSUs      
Disclosure of joint ventures [line items]      
Performance metric two, three and four respective grant, percentage   20.00% 20.00%
Average return on capital employed (in years)   5 years  
Performance metric one grant, percentage   40.00%  
Bottom of range      
Disclosure of joint ventures [line items]      
Useful life measured as period of time, intangible assets other than goodwill   3 years  
Vesting percentage     0.00%
Bottom of range | PSUs      
Disclosure of joint ventures [line items]      
Vesting percentage     0.00%
Top of range      
Disclosure of joint ventures [line items]      
Useful life measured as period of time, intangible assets other than goodwill   20 years  
Vesting percentage     200.00%
Top of range | PSUs      
Disclosure of joint ventures [line items]      
Vesting percentage     200.00%
Buildings and equipment (not used in production) | Bottom of range      
Disclosure of joint ventures [line items]      
Useful life   1 year  
Buildings and equipment (not used in production) | Top of range      
Disclosure of joint ventures [line items]      
Useful life   40 years  
Plant and equipment (smelting operations) | Bottom of range      
Disclosure of joint ventures [line items]      
Useful life   2 years  
Plant and equipment (smelting operations) | Top of range      
Disclosure of joint ventures [line items]      
Useful life   30 years  
Fort Hills Energy Limited Partnership      
Disclosure of joint ventures [line items]      
Proportion of ownership interest in joint operation 21.30%    
NuevaUnión      
Disclosure of joint ventures [line items]      
Proportion of ownership interest in joint venture   50.00%  
Galore Creek Partnership      
Disclosure of joint ventures [line items]      
Proportion of ownership interest in joint operation   50.00%  
Antamina      
Disclosure of joint ventures [line items]      
Proportion of ownership interest in joint operation   22.50%  
NewRange Copper Nickel LLC      
Disclosure of joint ventures [line items]      
Proportion of ownership interest in joint venture   50.00%  
S.A.P.I. de C.V.      
Disclosure of joint ventures [line items]      
Proportion of ownership interest in joint operation   87.00%