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Related Party Transactions - Disclosure of Information about Key Management Personnel (Details) - CAD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Related Party [Abstract]      
Total compensation $ 21 $ 23 $ 30
Short-term employee benefits 11 11 14
Post-employment benefits 1 1 1
Termination benefits 1 0 0
Share-based payments $ 8 $ 11 $ 15