Derivative financial instruments and hedging activities - Notional Amount of Derivatives by Term to Maturity (Absolute Amounts) (Parenthetical) (Detail) - CAD ($) $ in Billions |
12 Months Ended | |
|---|---|---|
Oct. 31, 2024 |
Oct. 31, 2023 |
|
| Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] | ||
| Debt Syndication Derivatives | $ 3 | $ 2 |
| Credit derivatives [member] | ||
| Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] | ||
| Derivative notional amount | 1 | 1 |
| Trading credit derivatives protection purchase amount | 135 | 119 |
| Trading credit derivatives protection sold amount | $ 122 | $ 115 |