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Inventories - Additional Information (Detail) - CAD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Inventories [Abstract]    
Cost of sales $ 9,868 $ 8,745
Inventories recognized as expense 8,900 7,700
Net realizable value of inventories 49 40
Inventory write downs $ 26 $ 50