Fair Value Measurements - Significant Unobservable Inputs in Level 3 Instrument Valuations (Details) - Level 3 $ in Millions |
6 Months Ended |
|---|---|
|
Apr. 30, 2026
CAD ($)
| |
| Disclosure of fair value measurement of assets [line items] | |
| Fair value liabilities | $ 135 |
| Corporate equity | |
| Disclosure of fair value measurement of assets [line items] | |
| Fair value of assets | $ 6,007 |
| Corporate equity | Low | |
| Disclosure of fair value measurement of assets [line items] | |
| Multiple | 6 |
| Corporate equity | High | |
| Disclosure of fair value measurement of assets [line items] | |
| Multiple | 21 |
| Other assets | |
| Disclosure of fair value measurement of assets [line items] | |
| Fair value of assets | $ 1,371 |
| Other assets | Low | |
| Disclosure of fair value measurement of assets [line items] | |
| Capitalization rate | 6.00% |
| Other assets | High | |
| Disclosure of fair value measurement of assets [line items] | |
| Capitalization rate | 7.00% |