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Commitments, Guarantees and Pledged Assets - Summary of Asset Pledging Amounts and Related Activities (Detail) - CAD ($) $ in Millions | Oct. 31, 2025 | Oct. 31, 2024
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Disclosure Assets Pledged As Collateral [Line Items] |  |  |
Asset pledging amounts and activities |  | $ 342,118 | $ 279,603
Financial assets pledged as collateral for securities lending [member] |  |  |
Disclosure Assets Pledged As Collateral [Line Items] |  |  |
Asset pledging amounts and activities |  | 93,433 | 63,072
Financial assets pledged as collateral for obligations related to securities sold under repurchase agreements [member] |  |  |
Disclosure Assets Pledged As Collateral [Line Items] |  |  |
Asset pledging amounts and activities |  | 130,197 | 109,151
Financial assets pledged as collateral for obligations related to securities sold short [member] |  |  |
Disclosure Assets Pledged As Collateral [Line Items] |  |  |
Asset pledging amounts and activities |  | 24,244 | 21,642
Financial assets pledged as collateral for securitizations [member] |  |  |
Disclosure Assets Pledged As Collateral [Line Items] |  |  |
Asset pledging amounts and activities |  | 18,090 | 20,105
Financial assets pledged as collateral for covered bonds [member] |  |  |
Disclosure Assets Pledged As Collateral [Line Items] |  |  |
Asset pledging amounts and activities |  | 51,638 | 39,257
Financial assets pledged as collateral for derivatives [member] |  |  |
Disclosure Assets Pledged As Collateral [Line Items] |  |  |
Asset pledging amounts and activities |  | 22,733 | 24,200
Financial assets pledged as collateral for foreign governments and central banks [member] |  |  |
Disclosure Assets Pledged As Collateral [Line Items] |  |  |
Asset pledging amounts and activities | [1] | 285 | 560
Financial assets pledged as collateral for clearing systems, payment systems, and depositories [member] |  |  |
Disclosure Assets Pledged As Collateral [Line Items] |  |  |
Asset pledging amounts and activities | [2] | 1,486 | 1,605
Financial assets pledged as collateral for liabilities, other [member] |  |  |
Disclosure Assets Pledged As Collateral [Line Items] |  |  |
Asset pledging amounts and activities |  | $ 12 | $ 11
[1] | Includes assets pledged to maintain access to central bank facilities in foreign jurisdictions.
[2] | Includes assets pledged in order to participate in clearing and payment systems and depositories.

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- Definition The amount of financial assets that the entity has pledged as collateral for liabilities or contingent liabilities, including amounts that have been reclassified in accordance with paragraph 3.2.23(a) of IFRS 9. [Refer: Classes of contingent liabilities [domain]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 14 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_14_a&doctype=Standard -URIDate 2024-03-27 + Details
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