Deposits - Summary of Deposits and Components (Parenthetical) (Detail) - CAD ($) $ in Millions |
Jan. 31, 2023 |
Oct. 31, 2022 |
|---|---|---|
| Disclosure Of Deposits [Line items] | ||
| Deposit | $ 694,724 | $ 697,572 |
| Purchased notes, net | 2,700 | 3,000 |
| Deposits structured liabilities | 11,400 | 10,600 |
| Payable on fixed date [member] | ||
| Disclosure Of Deposits [Line items] | ||
| Deposit | 335,435 | |
| Payable on fixed date [member] | Bank recapitalization (bail-in) conversion regulations [member] | ||
| Disclosure Of Deposits [Line items] | ||
| Deposit | 56,900 | 55,100 |
| Denominated in U.S. dollars [member] | ||
| Disclosure Of Deposits [Line items] | ||
| Deposit | 236,500 | 243,300 |
| Denominated in other foreign currencies [member] | ||
| Disclosure Of Deposits [Line items] | ||
| Deposit | $ 51,400 | $ 53,100 |