Derivative financial instruments and hedging activities - Summary of Fair Value Hedges - Assets and Liabilities Designated as hedged Items (Detail) - Fair value hedges [member] - Interest rate risk [member] - Designated as hedged items in hedging relationships [member] - CAD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Oct. 31, 2022 |
Oct. 31, 2021 |
|
| Fixed rate assets [member] | ||
| Disclosure of detailed information about hedged items [line items] | ||
| Carrying amount, Assets | $ 52,216 | $ 42,810 |
| Accumulated amount of fair value adjustments on the hedged item, Assets | $ (3,285) | $ (78) |
| Balance sheet items | Securities – Investment, net of applicable allowance; Loans – Retail; Loans – Wholesale | Securities – Investment, net of applicable allowance; Loans – Retail; Loans – Wholesale |
| Changes in fair values used for calculating hedge ineffectiveness | $ (3,695) | $ (1,027) |
| Fixed rate liabilities [member] | ||
| Disclosure of detailed information about hedged items [line items] | ||
| Carrying amount, Liabilities | 86,738 | 65,355 |
| Accumulated amount of fair value adjustments on the hedged item, Liabilities | $ (5,924) | $ (59) |
| Balance sheet items | Deposits - Business and government; Subordinated debentures | Deposits – Business and government; Subordinated debentures |
| Changes in fair values used for calculating hedge ineffectiveness | $ 5,742 | $ 1,842 |