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v3.25.2

Share capital - Schedule of Common Shares Issued (Detail) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jul. 31, 2025 CAD ($) Shares shares | Jul. 31, 2024 CAD ($) Shares shares | Jul. 31, 2025 CAD ($) Shares shares | Jul. 31, 2024 CAD ($) Shares shares
Disclosure of classes of share capital [line items] |  |  |  |
Balance at beginning of period |  |  | $ 59,007 |
Balance at end of period | $ 62,876 | $ 57,783 | $ 62,876 | $ 57,783
Common shares [member] |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |
Beginning balance, Number of shares | shares | 934,230,189 | 943,002,419 | 942,294,598 | 931,098,941
Balance at beginning of period | $ 16,929 | $ 16,813 | $ 17,011 | $ 16,082
Equity-settled share-based compensation plans, Number of shares | Shares | 786,626 | 204,180 | 2,191,152 | 897,057
Shareholder investment plan, Number of shares | shares |  | 651,277 | 629 | 10,462,890
Employee share purchase plan, Number of shares | shares |  | 688,578 |  | 2,146,385
Number of shares issued, Number of shares | shares | 935,016,815 | 944,546,454 | 944,486,379 | 944,605,273
Purchase of common shares for cancellation, Number of shares | shares | (5,500,000) |  | (15,000,000) |
Treasury shares, Number of shares | shares | (66,124) | 43,463 | (35,688) | (15,356)
Equity-settled share-based compensation plans | $ 46 | $ 12 | $ 132 | $ 49
Shareholder investment plan, Amount |  | 45 |  | 652
Employee share purchase plan, Amount |  | 46 |  | 136
Number of shares issued, Amount | 16,975 | 16,916 | 17,143 | 16,919
Purchase of common shares for cancellation, Amount | (100) |  | (272) |
Treasury shares, Amount | (8) | 3 | (4) |
Balance at end of period | $ 16,867 | $ 16,919 | $ 16,867 | $ 16,919
Ending balance, Number of shares | shares | 929,450,691 | 944,589,917 | 929,450,691 | 944,589,917

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