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v3.25.3

Share-Based Payments - Additional Information (Detail) shares in Thousands, $ in Millions | 12 Months Ended |
--- | --- | ---
Oct. 31, 2025 CAD ($) shares d | Oct. 31, 2024 CAD ($) shares | Oct. 31, 2023 shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Stock options, exercisable period | 10 years |  |
Number of business days extended | d | 10 |  |
Common shares [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Common shares held under employee ownership plan | shares | 21,000 | 21,000 |
Share based compensations award tranche one [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Vesting percentage | 50.00% |  |
Share based compensations award tranche two [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Vesting percentage | 50.00% |  |
Employee stock options [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Common shares reserved for future issuance | shares | 141,000 |  |
Common shares issued as a result of the exercise of options | shares | 120,000 |  |
Outstanding options | shares | 11,000 |  |
Available for issuance as options | shares | 11,000 |  |
Common shares held under employee ownership plan | shares | 10,087 | 11,456 | 11,558
Other reserves for vested stock options recorded in equity | $ | $ 124 | $ 124 |
Weighted-average period recognition | 1 year 10 months 2 days | 2 years 10 days |
SARs shares granted | shares | 1,587 | 2,676 |
Employee stock options [member] | Salaries and employee benefits [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Compensation expense | $ | $ 15 | $ 13 |
Future unrecognized compensation cost for non-vested stock options | $ | $ 8 | $ 10 |
Stock Appreciation Rights [Member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Common shares held under employee ownership plan | 485,684 | 570,156 |
SARs shares vested | 481,880 | 566,349 |
SARs shares granted | 119,316 | 81,414 |
Other share-based payment plans [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Share-based payment liability recognized for vested awards | $ | $ 1,446 | $ 1,010 |
Compensation expense | $ | 394 | 357 |
Net gains (loss) arising from derivatives | $ | $ 345 | $ 196 |
Deferred stock unit plan [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of units awarded and outstanding | 3,040,333 | 2,732,877 |
Number of units vested | 2,179,058 | 1,893,903 |
Directors' deferred stock unit plan [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of units awarded and outstanding | 436,880 | 420,889 |
Restricted share unit plan [Member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of units awarded and outstanding | 9,438,970 | 8,478,453 |
Number of units vested | 6,888,296 | 5,665,778 |
Performance Share Unit Plan [Member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of share based units outstanding | 7,026,302 | 6,766,501 |
Number of share based units vested | 6,010,837 | 4,843,892 |
Employee Stock Ownership Plan [Member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Compensation expense | $ | $ 94 | $ 94 |
Bottom of range [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Outstanding options expiration date | Dec. 03, 2025 |  |
Bottom of range [member] | Employee Stock Ownership Plan [Member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Percentage of employer matching contribution | 50.00% |  |
Top of range [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Outstanding options expiration date | Dec. 12, 2034 |  |
Top of range [member] | Employee Stock Ownership Plan [Member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Percentage of employer matching contribution | 60.00% |  |

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