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Acquisitions - Sunrise Oil Sands Partnership, Summary of Goodwill (Details) - CAD ($)
$ in Millions
Dec. 31, 2022
Aug. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of detailed information about business combination [line items]        
Goodwill $ 2,923   $ 3,473 $ 2,272
Sunrise Oil Sands Partnership        
Disclosure of detailed information about business combination [line items]        
Consideration transferred, acquisition-date fair value   $ 1,034    
Investment in Equity-Accounted Affiliates   1,559    
Total Identifiable Net Assets   (2,593)    
Goodwill   $ 0