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Joint Arrangements and Associate - Joint Operations (Details)
12 Months Ended
Dec. 31, 2021
BP-Husky Refining LLC  
Disclosure of joint operations [line items]  
Proportion of ownership interest in joint operation 50.00%
Sunrise Oil Sands Partnership  
Disclosure of joint operations [line items]  
Proportion of ownership interest in joint operation 50.00%
WRB Refining LP  
Disclosure of joint operations [line items]  
Proportion of ownership interest in joint operation 50.00%