v3.24.3
Joint ventures and associated companies - Summary of Carrying Value of Interests in Joint Ventures and Associated Companies Accounted Under the Equity Method (Parenthetical) (Detail) - CAD ($)
$ in Millions
12 Months Ended
Oct. 31, 2024
Oct. 31, 2023
Associated companies [member]    
Disclosure Of Joint Ventures And Associates [Line Items]    
Impairment losses $ 38 $ 242