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v3.25.3

Material Accounting Policies - Additional Information (Detail) - CAD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Oct. 31, 2025 | Oct. 31, 2024 | Oct. 31, 2023
Accounting Policies [Line Items] |  |  |
Description for entity ownership in consolidated entities whenless that half voting power | The Bank may consolidate an entity when it owns less than 50% of the voting rights when it has one or more other attributes of power |  |
Allowances for credit losses | $ 7,639 | $ 6,723 | $ 6,611
Computer software [member] |  |  |
Accounting Policies [Line Items] |  |  |
Useful lives of intangible assets other than goodwill | 10 years |  |
Purchased loans [member] |  |  |
Accounting Policies [Line Items] |  |  |
Allowances for credit losses | $ 0 |  |
Top of range [member] |  |  |
Accounting Policies [Line Items] |  |  |
Cash and deposits with financial institutions maturity period | 3 months |  |
Hedge instrument average rate | 125.00% |  |
Top of range [member] | Other intangible assets [member] |  |  |
Accounting Policies [Line Items] |  |  |
Useful lives of intangible assets other than goodwill | 20 years |  |
Bottom of range [member] |  |  |
Accounting Policies [Line Items] |  |  |
Hedge instrument average rate | 80.00% |  |
Bottom of range [member] | Other intangible assets [member] |  |  |
Accounting Policies [Line Items] |  |  |
Useful lives of intangible assets other than goodwill | 5 years |  |
Buildings [member] |  |  |
Accounting Policies [Line Items] |  |  |
Estimated useful lives of assets | 40 years |  |
Building fittings [member] |  |  |
Accounting Policies [Line Items] |  |  |
Estimated useful lives of assets | 15 years |  |
Equipment [member] | Top of range [member] |  |  |
Accounting Policies [Line Items] |  |  |
Estimated useful lives of assets | 10 years |  |
Equipment [member] | Bottom of range [member] |  |  |
Accounting Policies [Line Items] |  |  |
Estimated useful lives of assets | 3 years |  |
Leasehold improvements [member] |  |  |
Accounting Policies [Line Items] |  |  |
Estimated useful lives of assets | lease term determined by the Bank |  |

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