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Guarantees, Commitments and Pledged Assets - Summary of Carrying Value of Pledged Assets and Details of Related Activities (Detail) - CAD ($) $ in Millions | Oct. 31, 2025 | Oct. 31, 2024
--- | --- | ---
Disclosure of detailed information about financial instruments [line items] |  |  |
Securities and assets pledged |  | $ 308,176 | $ 255,401
Obligations related to securities sold under repurchase agreements |  | 174,010 | 174,335
Total | [1] | 482,186 | 429,736
Bank of Canada [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Securities and assets pledged | [2] | 274 | 229
Foreign governments and central banks [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Securities and assets pledged | [2] | 2,066 | 2,020
Clearing system payment systems and depositories [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Securities and assets pledged | [2] | 2,200 | 2,460
Exchange traded derivative transactions [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Securities and assets pledged |  | 5,715 | 5,334
Over The Counter Derivatives [Member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Securities and assets pledged |  | 33,785 | 25,487
Securities borrowing and lending [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Securities and assets pledged |  | 195,208 | 149,669
Covered bonds [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Securities and assets pledged | [3] | 44,832 | 47,560
Securitization [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Securities and assets pledged |  | 8,045 | 4,022
Canada mortgage housing corporation program [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Securities and assets pledged |  | 15,627 | 18,392
Other assets [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Securities and assets pledged |  | $ 424 | $ 228
[1] | Includes assets that have been received from counterparties through normal course of business in securities financing and derivative transactions.
[2] | Includes assets pledged in order to participate in clearing and payment systems and depositories, or pledged to have access to the facilities of central banks in foreign jurisdictions.
[3] | Excludes mortgages related to covered bonds held by the Bank or used for securities lending transactions.

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- Definition The fair value of collateral sold or repledged that was permitted to be sold or repledged in the absence of default by the owner of the collateral. [Refer: At fair value [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 15 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_15_b&doctype=Standard -URIDate 2024-03-27 + Details
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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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