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Segmented and geographic information - Breakdown of revenue from reporting segments (Detail) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Oct. 31, 2025 | Oct. 31, 2024
Disclosure of operating segments [line items] |  |
Revenue | $ 29,133 | $ 25,606
Canadian Personal and Business Banking [member] |  |
Disclosure of operating segments [line items] |  |
Revenue | 12,031 | 10,942
Canadian Commercial Banking and Wealth Management [member] |  |
Disclosure of operating segments [line items] |  |
Revenue | 6,902 | 6,018
Canadian Commercial Banking and Wealth Management [member] | Commercial banking [member] |  |
Disclosure of operating segments [line items] |  |
Revenue | 2,710 | 2,465
Canadian Commercial Banking and Wealth Management [member] | Wealth management [member] |  |
Disclosure of operating segments [line items] |  |
Revenue | 4,192 | 3,553
U.S. Commercial Banking and Wealth Management [member] |  |
Disclosure of operating segments [line items] |  |
Revenue | 3,216 | 2,820
U.S. Commercial Banking and Wealth Management [member] | Commercial banking [member] |  |
Disclosure of operating segments [line items] |  |
Revenue | 2,224 | 1,971
U.S. Commercial Banking and Wealth Management [member] | Wealth management [member] |  |
Disclosure of operating segments [line items] |  |
Revenue | 992 | 849
Capital Markets [member] |  |
Disclosure of operating segments [line items] |  |
Revenue | 6,148 | 4,800
Capital Markets [member] | Global Markets [member] |  |
Disclosure of operating segments [line items] |  |
Revenue | 3,996 | 3,055
Capital Markets [member] | Corporate and investment banking [member] |  |
Disclosure of operating segments [line items] |  |
Revenue | 2,152 | 1,745
Corporate and Other [member] |  |
Disclosure of operating segments [line items] |  |
Revenue | 836 | 1,026
Corporate and Other [member] | International banking [member] |  |
Disclosure of operating segments [line items] |  |
Revenue | 905 | 980
Corporate and Other [member] | Other [member] |  |
Disclosure of operating segments [line items] |  |
Revenue | $ (69) | $ 46

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