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Corporate Income Taxes - Components of Income Tax Provision (Detail) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Oct. 31, 2025 | Oct. 31, 2024
Current income taxes: |  |  |
Current tax expense income and adjustments for current tax of prior periods |  | $ 3,300 | $ 1,594
Deferred income taxes: |  |  |
Deferred tax expense income |  | (549) | 438
Total income taxes and effective tax rate |  | 2,751 | 2,032
Provision for income taxes in the Consolidated Statement of Changes in Equity: |  |  |
Current income taxes |  | (162) | 1,019
Deferred income taxes |  | 224 | 41
Total provision for income taxes in the Consolidated Statement of Changes in Equity |  | 62 | 1,060
Total provision for income taxes |  | 2,813 | 3,092
Deferred tax expense (benefit) relating to origination/reversal of temporary differences |  | (549) | 438
Deferred tax expense income recognised in profit or loss | [1] | (549) | 438
Retained earnings [member] |  |  |
Provision for income taxes in the Consolidated Statement of Changes in Equity: |  |  |
Total provision for income taxes in the Consolidated Statement of Changes in Equity |  | (125) | (96)
Recognized in other comprehensive income [Member] |  |  |
Provision for income taxes in the Consolidated Statement of Changes in Equity: |  |  |
Total provision for income taxes in the Consolidated Statement of Changes in Equity |  | 187 | 1,156
Canada [member] |  |  |
Current income taxes: |  |  |
Federal |  | 1,088 | 138
Provincial |  | 786 | 275
Adjustments related to prior periods |  | 23 | (40)
Deferred income taxes: |  |  |
Federal |  | (261) | 388
Provincial |  | (154) | 181
International [member] |  |  |
Current income taxes: |  |  |
Foreign |  | 1,418 | 1,219
Adjustments related to prior periods |  | (15) | 2
Deferred income taxes: |  |  |
Foreign |  | $ (134) | $ (131)
[1] | For Consolidated Statement of Financial Position presentation, deferred tax assets and liabilities are assessed by legal entity. As a result, the net deferred tax assets of $1,839 (2024 – $1,545) are represented by deferred tax assets of $3,253 (2024 – $2,942), and deferred tax liabilities of $1,414 (2024 – $1,397) on the Consolidated Statement of Financial Position.

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