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Cash and Cash Equivalents - Schedule Representing Cash and Cash Equivalents (Detail) - CAD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Cash and cash equivalents [abstract]        
Cash $ 3,195 $ 2,366    
Short-Term Investments 1,329 507    
Total Cash and Cash Equivalents $ 4,524 $ 2,873 $ 378 $ 186