IFRS 7 - Disclosure - Liquidity Risk - Summary of Credit Related Commitments (Parenthetical) (Detail) - CAD ($) $ in Millions |
Jan. 31, 2023 |
Oct. 31, 2022 |
|---|---|---|
| Disclosure of commitments [line items] | ||
| Cash collateral on securities lent | $ 4,096 | $ 4,853 |
| Personal, home equity, and credit card lines [member] | ||
| Disclosure of commitments [line items] | ||
| Capital commitment | 172,200 | 167,300 |
| Securities lending [member] | ||
| Disclosure of commitments [line items] | ||
| Cash collateral on securities lent | $ 4,100 | $ 4,900 |