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Lease Right-Of-Use Assets - Additional Information (Detail) - CAD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Earnings Or Loss [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Depreciation, right-of-use asset $ 23 $ 16
Cost Of Goods Sold [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Depreciation, right-of-use asset 16 13
Selling And Administrative Expenses [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Depreciation, right-of-use asset $ 7 $ 3