Cash and Deposits with Financial Institutions - Additional Information (Detail) - CAD ($) $ in Millions |
Apr. 30, 2026 |
Jan. 31, 2026 |
Oct. 31, 2025 |
|---|---|---|---|
| Mandatory Reserve Deposits At Central Banks [abstract] | |||
| Cash balances required to maintain with central banks, other regulatory authorities and certain counterparties | $ 5,720 | $ 5,216 | $ 6,759 |