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Designated Accounting Hedges - Summary of Items Designated as Hedged Items (Detail) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Oct. 31, 2025 | Oct. 31, 2024
Cash flow hedges [member] |  |
Disclosure of detailed information about hedged items [line items] |  |
Carrying amount of the hedged item, Assets | $ 53,148 | $ 41,233
Carrying amount of the hedged item, Liabilities | 25,631 | 18,598
Gains (losses) on change in fair value used for calculating hedge ineffectiveness | (1,965) | (3,252)
Cash flow hedges [member] | Deposits [member] | Foreign Exchange rate Risk [member] |  |
Disclosure of detailed information about hedged items [line items] |  |
Carrying amount of the hedged item, Liabilities | 22,807 | 16,524
Gains (losses) on change in fair value used for calculating hedge ineffectiveness | (687) | (710)
Cash flow hedges [member] | Loan commitments [member] | Interest rate risk [member] |  |
Disclosure of detailed information about hedged items [line items] |  |
Carrying amount of the hedged item, Assets | 53,148 | 41,233
Gains (losses) on change in fair value used for calculating hedge ineffectiveness | (565) | (1,622)
Cash flow hedges [member] | Share-based payment [member] |  |
Disclosure of detailed information about hedged items [line items] |  |
Carrying amount of the hedged item, Liabilities | 2,824 | 2,074
Gains (losses) on change in fair value used for calculating hedge ineffectiveness | (713) | (920)
NIFO hedges [member] |  |
Disclosure of detailed information about hedged items [line items] |  |
Carrying amount of the hedged item, Assets | 41,733 | 39,742
Gains (losses) on change in fair value used for calculating hedge ineffectiveness | 297 | 267
Fair value hedges [member] |  |
Disclosure of detailed information about hedged items [line items] |  |
Carrying amount of the hedged item, Assets | 96,351 | 124,118
Carrying amount of the hedged item, Liabilities | 137,420 | 160,824
Accumulated amount of fair value hedge adjustments on the hedged item, Assets | 1,028 | 655
Accumulated amount of fair value hedge adjustments on the hedged item, Liabilities | (897) | (1,779)
Gains (losses) on change in fair value used for calculating hedge ineffectiveness | (245) | 1,420
Fair value hedges [member] | Deposits [member] | Interest rate risk [member] |  |
Disclosure of detailed information about hedged items [line items] |  |
Carrying amount of the hedged item, Liabilities | 99,987 | 133,104
Accumulated amount of fair value hedge adjustments on the hedged item, Liabilities | (664) | (1,142)
Gains (losses) on change in fair value used for calculating hedge ineffectiveness | (741) | (2,135)
Fair value hedges [member] | Deposits [member] | Combined foreign exchange and interest rate risk [member] |  |
Disclosure of detailed information about hedged items [line items] |  |
Carrying amount of the hedged item, Liabilities | 31,903 | 21,531
Accumulated amount of fair value hedge adjustments on the hedged item, Liabilities | (375) | (733)
Gains (losses) on change in fair value used for calculating hedge ineffectiveness | (372) | (741)
Fair value hedges [member] | Loan commitments [member] | Interest rate risk [member] |  |
Disclosure of detailed information about hedged items [line items] |  |
Carrying amount of the hedged item, Assets | 11,014 | 51,302
Accumulated amount of fair value hedge adjustments on the hedged item, Assets | 97 | 770
Gains (losses) on change in fair value used for calculating hedge ineffectiveness | (186) | 1,057
Fair value hedges [member] | Securities [member] | Interest rate risk [member] |  |
Disclosure of detailed information about hedged items [line items] |  |
Carrying amount of the hedged item, Assets | 85,323 | 72,816
Accumulated amount of fair value hedge adjustments on the hedged item, Assets | 931 | (115)
Gains (losses) on change in fair value used for calculating hedge ineffectiveness | 1,114 | 3,446
Fair value hedges [member] | Securities [member] | Combined foreign exchange and interest rate risk [member] |  |
Disclosure of detailed information about hedged items [line items] |  |
Carrying amount of the hedged item, Assets | 14 |
Fair value hedges [member] | Subordinated indebtedness [member] | Interest rate risk [member] |  |
Disclosure of detailed information about hedged items [line items] |  |
Carrying amount of the hedged item, Liabilities | 5,530 | 6,189
Accumulated amount of fair value hedge adjustments on the hedged item, Liabilities | 142 | 96
Gains (losses) on change in fair value used for calculating hedge ineffectiveness | $ (60) | $ (207)

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- Definition The accumulated amount of fair value hedge adjustment on a hedged item that is included in the carrying amount of the hedged item, recognised in the statement of financial position as an asset. [Refer: Hedged items [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 24B -Subparagraph a -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24B_a_ii&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The accumulated amount of fair value hedge adjustment on a hedged item that is included in the carrying amount of the hedged item, recognised in the statement of financial position as a liability. [Refer: Hedged items [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 24B -Subparagraph a -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24B_a_ii&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The gain (loss) on the change in fair value of the hedged item used as a basis for recognising hedge ineffectiveness. Hedge ineffectiveness is the extent to which the changes in the fair value or the cash flows of the hedging instrument are greater or less than those on the hedged item. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 24B -Subparagraph a -Clause iv -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24B_a_iv&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 24B -Subparagraph b -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24B_b_i&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of a hedged item, recognised as an asset. [Refer: Hedged items [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 24B -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24B_a_i&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of a hedged item, recognised as a liability. [Refer: Hedged items [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 24B -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24B_a_i&doctype=Standard -URIDate 2024-03-27 + Details
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