Employee benefits - Pension and Other Post-employment Benefits - Weighted Average Assumptions to Determine Benefit Obligation (Detail) |
Oct. 31, 2022 |
Oct. 31, 2021 |
|---|---|---|
| Defined benefit pension plans [member] | ||
| Disclosure of sensitivity analysis for actuarial assumptions [line items] | ||
| Discount rate | 5.40% | 3.30% |
| Rate of increase in future compensation | 3.00% | 3.00% |
| Other post employment benefit [member] | ||
| Disclosure of sensitivity analysis for actuarial assumptions [line items] | ||
| Discount rate | 5.50% | 3.60% |
| Healthcare cost trend rates | ||
| - Medical | 3.50% | 3.40% |
| - Dental | 3.10% | 3.10% |