IFRS 7 - Disclosure - Credit Risk - Summary of Rating Profile of OTC Derivative Mark to Market (MTM) Receivables (Detail) - CAD ($) $ in Millions |
Jan. 31, 2023 |
Oct. 31, 2022 |
|---|---|---|
| Disclosure of credit risk exposure [line items] | ||
| Exposure | $ 1,047,467 | $ 1,054,714 |
| OTC derivatives [member] | ||
| Disclosure of credit risk exposure [line items] | ||
| Exposure | $ 7,070 | $ 14,140 |
| Exposure percentage | 100.00% | 100.00% |
| Investment grade [member] | OTC derivatives [member] | ||
| Disclosure of credit risk exposure [line items] | ||
| Exposure | $ 5,900 | $ 11,180 |
| Exposure percentage | 83.40% | 79.10% |
| Non investment grade [member] | OTC derivatives [member] | ||
| Disclosure of credit risk exposure [line items] | ||
| Exposure | $ 1,150 | $ 2,870 |
| Exposure percentage | 16.30% | 20.30% |
| Watch list [member] | OTC derivatives [member] | ||
| Disclosure of credit risk exposure [line items] | ||
| Exposure | $ 20 | $ 90 |
| Exposure percentage | 0.30% | 0.60% |