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Principal Subsidiaries and Non-Controlling Interests in Subsidiaries - Summary Of Financial Information About The Amounts Attributable To Non Controlling Interests (Detail) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Oct. 31, 2025 | Oct. 31, 2024
Disclosure of noncontrolling interests [Line Items] |  |
Revenue | $ 37,741 | $ 33,670
Total comprehensive income | 10,155 | 8,604
Total assets | 1,460,042 | 1,412,027
Total liabilities | 1,371,455 | 1,327,951
Minority partner [member] |  |
Disclosure of noncontrolling interests [Line Items] |  |
Revenue | 4,522 | 4,455
Total comprehensive income | 602 | 226
Total assets | 95,993 | 93,051
Total liabilities | $ 84,493 | $ 82,223

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