Insurance - Significant Insurance Assumptions (Detail) - Life insurance contracts [member] |
Oct. 31, 2022 |
Oct. 31, 2021 |
|---|---|---|
| Country of domicile [member] | ||
| Disclosure of sensitivity analysis for actuarial assumptions [line items] | ||
| Mortality rates | 0.11% | 0.12% |
| Morbidity rates | 1.81% | 1.78% |
| Future reinvestment yield | 3.75% | 3.76% |
| Lapse rates | 0.50% | 0.50% |
| Foreign countries [member] | ||
| Disclosure of sensitivity analysis for actuarial assumptions [line items] | ||
| Mortality rates | 0.80% | 0.79% |
| Future reinvestment yield | 2.90% | 2.90% |