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Financial instruments - disclosures (Tables) | 12 Months Ended
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Oct. 31, 2025
Text Block [Abstract] |
Schedule of Balance Sheet Exposure Credit Risk under Different Basel Approaches |
$ millions, as at October 31 |  | IRB approach |  |  | Standardized approach |  |  | Other credit risk (1) |  |  | Securitization approach |  |  | Total subject to credit risk |  |  | Not subject to credit risk |  |  | Total consolidated balance sheet |
2025 |  | Cash and deposits with banks |  | $ | 38,725 |  |  | $ | 2,864 |  |  | $ | 2,414 |  |  | $ | – |  |  | $ | 44,003 |  |  | $ | – |  |  | $ | 44,003 |
|  | Securities |  |  | 150,549 |  |  |  | 5,594 |  |  |  | – |  |  |  | 3,696 |  |  |  | 159,839 |  |  |  | 123,396 |  |  |  | 283,235 |
|  | Cash collateral on securities borrowed |  |  | 21,694 |  |  |  | 3 |  |  |  | – |  |  |  | – |  |  |  | 21,697 |  |  |  | – |  |  |  | 21,697 |
|  | Securities purchased under resale agreements |  |  | 66,181 |  |  |  | – |  |  |  | – |  |  |  | 2,863 |  |  |  | 69,044 |  |  |  | 17,651 |  |  |  | 86,695 |
|  | Loans (2) |  |  | 548,529 |  |  |  | 16,267 |  |  |  | 1,155 |  |  |  | 25,086 |  |  |  | 591,037 |  |  |  | 2,859 |  |  |  | 593,896 |
|  | Allowance for credit losses |  |  | (4,085 | ) |  |  | (307 | ) |  |  | – |  |  |  | – |  |  |  | (4,392 | ) |  |  | – |  |  |  | (4,392 | )
|  | Derivative instruments |  |  | 38,352 |  |  |  | – |  |  |  | – |  |  |  | – |  |  |  | 38,352 |  |  |  | – |  |  |  | 38,352 |
|  | Other assets |  |  | 25,125 |  |  |  | 1,832 |  |  |  | 9,769 |  |  |  | 130 |  |  |  | 36,856 |  |  |  | 16,596 |  |  |  | 53,452 |
|  | Total credit exposures |  | $ | 885,070 |  |  | $ | 26,253 |  |  | $ | 13,338 |  |  | $ | 31,775 |  |  | $ | 956,436 |  |  | $ | 160,502 |  |  | $ | 1,116,938 |
2024 |  | Total credit exposures |  | $ | 839,643 |  |  | $ | 24,493 |  |  | $ | 12,107 |  |  | $ | 23,509 |  |  | $ | 899,752 |  |  | $ | 142,233 |  |  | $ | 1,041,985 |
(1) | Includes credit risk exposures arising from other assets that are subject to the credit risk framework but are not included in the standardized or IRB frameworks, including other balance sheet assets which are risk-weighted at 100%, significant investments in the capital of non-financial institutions, and amounts below the thresholds for capital deduction that are risk-weighted at 250%.
(2) | Includes customers’ liability under acceptances of $10 million.

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- Definition Disclosure of balance sheet assets subject to credit risk. + References No definition available. + Details
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