Derivative financial instruments and hedging activities - Summary of Fair Value Hedges - Assets and Liabilities Designated as hedged Items (Parenthetical) (Detail) - CAD ($) $ in Millions |
Oct. 31, 2022 |
Oct. 31, 2021 |
|---|---|---|
| Fair value hedge, Hedged items - Fixed rate assets [member] | ||
| Disclosure of detailed information about hedged items [line items] | ||
| Accumulated amount of fair value hedge adjustments on hedged items ceased to be adjusted for hedging gains/losses | $ (486) | $ 125 |
| Fair value hedge, Hedged items - Fixed rate liabilities [member] | ||
| Disclosure of detailed information about hedged items [line items] | ||
| Accumulated amount of fair value hedge adjustments on hedged items ceased to be adjusted for hedging gains/losses | $ (25) | $ (62) |