Insurance and reinsurance - Summary of Composition of Insurance Service Result and Insurance Investment Result for Insurance Contracts Issued and Reinsurance Contracts Held (Detail) - CAD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Jul. 31, 2026 |
Jul. 31, 2025 |
Jul. 31, 2026 |
Jul. 31, 2025 |
|
| Insurance service result | ||||
| Insurance revenue | $ 1,364 | $ 1,369 | $ 4,104 | $ 4,108 |
| Insurance service expense | (1,106) | (1,074) | (3,341) | (3,290) |
| Net income (expense) from reinsurance contracts held | (31) | (16) | (79) | (29) |
| Insurance service result | 227 | 279 | 684 | 789 |
| Insurance investment result | ||||
| Net investment income | 1,155 | 122 | 1,337 | 747 |
| Insurance finance income (expense) | (1,143) | (68) | (1,182) | (574) |
| Reinsurance finance income (expense) | 48 | (6) | 56 | 35 |
| Insurance investment result | 60 | 48 | 211 | 208 |
| Insurance service and insurance investment results | $ 287 | $ 327 | $ 895 | $ 997 |