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IFRS 7 - Disclosure - Credit Risk - Summary of Breakdown of Our Standardized Credit Risk Exposures by Risk-weight Category (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
Standardized approach risk [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 60,219 | 49,937
Standardized approach risk [member] | Corporate segment [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 8,704 | 8,179
Standardized approach risk [member] | Sovereign [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 9,169 | 8,137
Standardized approach risk [member] | Banks [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 1,066 | 1,298
Standardized approach risk [member] | Real estate secured personal lending [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 3,086 | 3,030
Standardized approach risk [member] | Other retail [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 8,089 | 8,042
Standardized approach risk [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 30,114 | $ 28,686
0% risk weight category [member] | Standardized approach risk [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 7,248 |
0% risk weight category [member] | Standardized approach risk [member] | Sovereign [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 7,248 |
1–20% risk weight category [member] | Standardized approach risk [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 6,401 |
1–20% risk weight category [member] | Standardized approach risk [member] | Sovereign [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 598 |
1–20% risk weight category [member] | Standardized approach risk [member] | Banks [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 945 |
1–20% risk weight category [member] | Standardized approach risk [member] | Real estate secured personal lending [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 715 |
1–20% risk weight category [member] | Standardized approach risk [member] | Other retail [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 4,143 |
21–50% risk weight category [member] | Standardized approach risk [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 2,294 |
21–50% risk weight category [member] | Standardized approach risk [member] | Sovereign [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 308 |
21–50% risk weight category [member] | Standardized approach risk [member] | Banks [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 39 |
21–50% risk weight category [member] | Standardized approach risk [member] | Real estate secured personal lending [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 1,947 |
51–75% risk weight category [member] | Standardized approach risk [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 4,240 |
51–75% risk weight category [member] | Standardized approach risk [member] | Corporate segment [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 9 |
51–75% risk weight category [member] | Standardized approach risk [member] | Real estate secured personal lending [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 298 |
51–75% risk weight category [member] | Standardized approach risk [member] | Other retail [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 3,933 |
76–100% risk weight category [member] | Standardized approach risk [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 9,516 |
76–100% risk weight category [member] | Standardized approach risk [member] | Corporate segment [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 8,396 |
76–100% risk weight category [member] | Standardized approach risk [member] | Sovereign [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 959 |
76–100% risk weight category [member] | Standardized approach risk [member] | Banks [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 30 |
76–100% risk weight category [member] | Standardized approach risk [member] | Real estate secured personal lending [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 119 |
76–100% risk weight category [member] | Standardized approach risk [member] | Other retail [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 12 |
101–150% risk weight category [member] | Standardized approach risk [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 415 |
101–150% risk weight category [member] | Standardized approach risk [member] | Corporate segment [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 299 |
101–150% risk weight category [member] | Standardized approach risk [member] | Sovereign [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 56 |
101–150% risk weight category [member] | Standardized approach risk [member] | Banks [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 52 |
101–150% risk weight category [member] | Standardized approach risk [member] | Real estate secured personal lending [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | 7 |
101–150% risk weight category [member] | Standardized approach risk [member] | Other retail [member] |  |
Disclosure of credit risk exposure [line items] |  |
Exposure to Credit Risk | $ 1 |

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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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