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Long-Term Debt - Aggregate Maturities of Long-term Debt (Detail) - CAD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Disclosure of detailed information about borrowings [Line Items]    
Long-term debt $ 6,234 $ 4,882
Three to Five years [Member]    
Disclosure of detailed information about borrowings [Line Items]    
Long-term debt 2,661 1,605
Over 5 years [Member]    
Disclosure of detailed information about borrowings [Line Items]    
Long-term debt $ 3,573 $ 3,277