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Investments - Summary of Investments (Details) - CAD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Disclosure of detailed information about financial instruments [line items]    
Investments $ 491 $ 309
Investment in PrairieSky Royalty Ltd.    
Disclosure of detailed information about financial instruments [line items]    
Investments $ 491 $ 309