Deposits - Summary of Deposit Liabilities (Parenthetical) (Detail) - CAD ($) $ in Millions |
Oct. 31, 2022 |
Oct. 31, 2021 |
|---|---|---|
| Disclosure of deposits [line items] | ||
| Total deposits | $ 1,208,814 | $ 1,100,831 |
| U.S. dollars [member] | ||
| Disclosure of deposits [line items] | ||
| Total deposits | 465,000 | 399,000 |
| British pounds [member] | ||
| Disclosure of deposits [line items] | ||
| Total deposits | 35,000 | 35,000 |
| Euro [member] | ||
| Disclosure of deposits [line items] | ||
| Total deposits | 50,000 | 43,000 |
| Other currencies [member] | ||
| Disclosure of deposits [line items] | ||
| Total deposits | $ 30,000 | $ 27,000 |