Insurance - Summary of Insurance Investment Results (Details) - CAD ($) $ in Millions |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Jul. 31, 2026 |
Apr. 30, 2026 |
Jul. 31, 2025 |
Jul. 31, 2026 |
Jul. 31, 2025 |
|
| Insurance service result [abstract] | |||||
| Investment return | $ 111 | $ 132 | $ 106 | $ 433 | |
| Insurance finance income (expense) from insurance and reinsurance contracts held | (40) | (120) | 83 | (332) | |
| Movement in investment contract liabilities | (5) | 17 | 4 | (16) | |
| Insurance investment results | $ 66 | $ 51 | $ 29 | $ 193 | $ 85 |