XML 71 R57.htm IDEA: XBRL DOCUMENT v3.25.0.1
Securities - Summary of Securities (Parenthetical) (Detail)
$ in Millions
3 Months Ended
Oct. 31, 2024
CAD ($)
Debt securities [member] | Financial assets at amortised cost, category [member]  
Disclosure of detailed information about financial instruments [line items]  
Realized gain (loss) on disposal of debt securities $ 0