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IFRS 7 - Disclosure - Credit Risk- Summary of Geographic Distribution of Business and Government Exposures Under the AIRB Approach (Detail) - CAD ($) $ in Millions | Oct. 31, 2025 | Oct. 31, 2024
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Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | $ 1,095,621 | $ 1,022,941
Business and government portfolios [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 561,762 | 522,546
Internal Ratings Based [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 1,035,402 | 973,004
Internal Ratings Based [member] | Business and government portfolios [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 542,824 | 504,932
Internal Ratings Based [member] | Business and government portfolios [member] | Drawn [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 406,405 |
Internal Ratings Based [member] | Business and government portfolios [member] | Undrawn commitments [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 67,929 |
Internal Ratings Based [member] | Business and government portfolios [member] | Repo style transactions [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 25,582 |
Internal Ratings Based [member] | Business and government portfolios [member] | Other off balance sheet items [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 20,094 |
Internal Ratings Based [member] | Business and government portfolios [member] | OTC derivatives [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 22,814 |
Canada [member] | Internal Ratings Based [member] | Business and government portfolios [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 256,325 | 237,346
Canada [member] | Internal Ratings Based [member] | Business and government portfolios [member] | Drawn [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 190,240 |
Canada [member] | Internal Ratings Based [member] | Business and government portfolios [member] | Undrawn commitments [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 36,642 |
Canada [member] | Internal Ratings Based [member] | Business and government portfolios [member] | Repo style transactions [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 6,161 |
Canada [member] | Internal Ratings Based [member] | Business and government portfolios [member] | Other off balance sheet items [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 9,876 |
Canada [member] | Internal Ratings Based [member] | Business and government portfolios [member] | OTC derivatives [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 13,406 |
United States [member] | Internal Ratings Based [member] | Business and government portfolios [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 225,217 | 216,408
United States [member] | Internal Ratings Based [member] | Business and government portfolios [member] | Drawn [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 180,725 |
United States [member] | Internal Ratings Based [member] | Business and government portfolios [member] | Undrawn commitments [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 23,140 |
United States [member] | Internal Ratings Based [member] | Business and government portfolios [member] | Repo style transactions [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 9,069 |
United States [member] | Internal Ratings Based [member] | Business and government portfolios [member] | Other off balance sheet items [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 7,663 |
United States [member] | Internal Ratings Based [member] | Business and government portfolios [member] | OTC derivatives [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 4,620 |
Europe [member] | Internal Ratings Based [member] | Business and government portfolios [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 36,810 | 27,539
Europe [member] | Internal Ratings Based [member] | Business and government portfolios [member] | Drawn [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 21,839 |
Europe [member] | Internal Ratings Based [member] | Business and government portfolios [member] | Undrawn commitments [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 5,683 |
Europe [member] | Internal Ratings Based [member] | Business and government portfolios [member] | Repo style transactions [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 4,935 |
Europe [member] | Internal Ratings Based [member] | Business and government portfolios [member] | Other off balance sheet items [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 1,545 |
Europe [member] | Internal Ratings Based [member] | Business and government portfolios [member] | OTC derivatives [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 2,808 |
Other geographical areas [member] | Internal Ratings Based [member] | Business and government portfolios [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 24,472 | $ 23,639
Other geographical areas [member] | Internal Ratings Based [member] | Business and government portfolios [member] | Drawn [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 13,601 |
Other geographical areas [member] | Internal Ratings Based [member] | Business and government portfolios [member] | Undrawn commitments [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 2,464 |
Other geographical areas [member] | Internal Ratings Based [member] | Business and government portfolios [member] | Repo style transactions [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 5,417 |
Other geographical areas [member] | Internal Ratings Based [member] | Business and government portfolios [member] | Other off balance sheet items [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 1,010 |
Other geographical areas [member] | Internal Ratings Based [member] | Business and government portfolios [member] | OTC derivatives [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | $ 1,980 |

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- Definition The amount that best represents the maximum exposure to credit risk without taking into account any collateral held or other credit enhancements (for example, netting agreements that do not qualify for offset in accordance with IAS 32). [Refer: Credit risk [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 35K -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35K_a&doctype=Standard -URIDate 2024-03-27 + Details
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