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Deposits - Summary of Deposits and Components (Detail) - CAD ($) $ in Millions | Apr. 30, 2025 | Oct. 31, 2024
--- | --- | ---
Disclosure Of Deposits [Line items] |  |
Deposits | $ 784,627 | $ 764,857
Payable on demand [member] |  |
Disclosure Of Deposits [Line items] |  |
Deposits | 135,250 |
Payable after notice [member] |  |
Disclosure Of Deposits [Line items] |  |
Deposits | 261,000 |
Payable on fixed date [member] |  |
Disclosure Of Deposits [Line items] |  |
Deposits | 388,377 |
Financial liabilities at carrying value [member] |  |
Disclosure Of Deposits [Line items] |  |
Held at amortized cost | 745,584 | 725,849
Financial liabilities at fair value [member] |  |
Disclosure Of Deposits [Line items] |  |
Designated at fair value | 39,043 | 39,008
Personal [member] |  |
Disclosure Of Deposits [Line items] |  |
Deposits | 255,523 | 252,894
Personal [member] | Payable on demand [member] |  |
Disclosure Of Deposits [Line items] |  |
Deposits | 14,563 |
Personal [member] | Payable after notice [member] |  |
Disclosure Of Deposits [Line items] |  |
Deposits | 142,147 |
Personal [member] | Payable on fixed date [member] |  |
Disclosure Of Deposits [Line items] |  |
Deposits | 98,813 |
Business and government [member] |  |
Disclosure Of Deposits [Line items] |  |
Deposits | 441,342 | 435,499
Business and government [member] | Payable on demand [member] |  |
Disclosure Of Deposits [Line items] |  |
Deposits | 104,128 |
Business and government [member] | Payable after notice [member] |  |
Disclosure Of Deposits [Line items] |  |
Deposits | 118,217 |
Business and government [member] | Payable on fixed date [member] |  |
Disclosure Of Deposits [Line items] |  |
Deposits | 218,997 |
Bank [member] |  |
Disclosure Of Deposits [Line items] |  |
Deposits | 27,401 | 20,009
Bank [member] | Payable on demand [member] |  |
Disclosure Of Deposits [Line items] |  |
Deposits | 16,559 |
Bank [member] | Payable after notice [member] |  |
Disclosure Of Deposits [Line items] |  |
Deposits | 636 |
Bank [member] | Payable on fixed date [member] |  |
Disclosure Of Deposits [Line items] |  |
Deposits | 10,206 |
Secured borrowings [member] |  |
Disclosure Of Deposits [Line items] |  |
Deposits | 60,361 | 56,455
Secured borrowings [member] | Payable on fixed date [member] |  |
Disclosure Of Deposits [Line items] |  |
Deposits | 60,361 |
Canada [member] | Non interest bearing deposits [member] |  |
Disclosure Of Deposits [Line items] |  |
Deposits | 87,482 | 84,460
Canada [member] | Interest bearing deposits with banks [member] |  |
Disclosure Of Deposits [Line items] |  |
Deposits | 530,160 | 526,186
USA [member] | Non interest bearing deposits [member] |  |
Disclosure Of Deposits [Line items] |  |
Deposits | 12,924 | 12,927
USA [member] | Interest bearing deposits with banks [member] |  |
Disclosure Of Deposits [Line items] |  |
Deposits | 109,298 | 101,141
Other International [Member] | Non interest bearing deposits [member] |  |
Disclosure Of Deposits [Line items] |  |
Deposits | 6,601 | 5,691
Other International [Member] | Interest bearing deposits with banks [member] |  |
Disclosure Of Deposits [Line items] |  |
Deposits | $ 38,162 | $ 34,452

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