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Goodwill and Intangible Assets - Additional Information (Detail) - CAD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Oct. 31, 2025 | Oct. 31, 2024
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets with indefinite lives | $ 179 | $ 228
Cash-generating units [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Cash flow projection period | 10 years |
Terminal growth rate | 1.50% | 2.00%
Bottom of range [member] | Cash-generating units [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Discount rates for determine the recoverable amount | 9.30% | 9.80%
Top of range [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Useful lives of intangible assets other than goodwill | 15 years |
Top of range [member] | Cash-generating units [member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Discount rates for determine the recoverable amount | 11.60% | 10.80%

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- Definition The growth rate used to extrapolate cash flow projections beyond the period covered by the most recent budgets/forecasts for a cash-generating unit (group of units). [Refer: Total for all cash-generating units [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2024-01-01 -Paragraph 134 -Subparagraph d -Clause iv -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2024-en-r&anchor=para_134_d_iv&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2024-01-01 -Paragraph 134 -Subparagraph e -Clause iv -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2024-en-r&anchor=para_134_e_iv&doctype=Standard -URIDate 2024-03-27 + Details
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