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Earnings Per Share - Summary of Basic and Diluted Earnings Per Share (Detail) - CAD ($) $ / shares in Units, $ in Millions | 12 Months Ended
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Oct. 31, 2025 | Oct. 31, 2024
Basic Earnings Per Common Share |  |  |
Net income attributable to bank shareholders |  | $ 8,709 | $ 7,318
Dividends on preferred shares and distributions on other equity instruments |  | (436) | (386)
Net income available to common shareholders |  | $ 8,273 | $ 6,932
Weighted-average number of common shares outstanding |  | 721,926,000 | 727,738,000
Basic earnings per common share |  | $ 11.46 | $ 9.52
Diluted Earnings Per Common Share |  |  |
Net income available to common shareholders |  | $ 8,273 | $ 6,932
Weighted-average number of common shares outstanding |  | 721,926,000 | 727,738,000
Dilutive impact of stock options |  |  |
Stock options potentially exercisable | [1] | 5,897,000 | 3,556,000
Common shares potentially repurchased | [1] | (4,556,000) | (2,759,000)
Weighted-average number of diluted common shares outstanding |  | 723,267,000 | 728,535,000
Diluted earnings per common share |  | $ 11.44 | $ 9.51
[1] | The dilutive effect of stock options was calculated using the treasury stock method. In computing diluted earnings per common share, we excluded average stock options outstanding of 477,101 with a weighted-average exercise price of $150.96 for the year ended October 31, 2025 (3,220,995 with a weighted-average exercise price of $130.33 for the year ended October 31, 2024), as the average share price in each of the two years did not exceed the exercise price.

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- Definition The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2024-01-01 -Paragraph 70 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2024-en-r&anchor=para_70_b&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator) divided by the weighted average number of ordinary shares outstanding during the period (the denominator). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2024-01-01 -Paragraph 66 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2024-en-r&anchor=para_66&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2024-01-01 -Paragraph 67 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2024-en-r&anchor=para_67&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator), divided by the weighted average number of ordinary shares outstanding during the period (the denominator), both adjusted for the effects of all dilutive potential ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2024-01-01 -Paragraph 66 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2024-en-r&anchor=para_66&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2024-01-01 -Paragraph 67 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2024-en-r&anchor=para_67&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The profit (loss) attributable to ordinary equity holders of the parent entity. [Refer: Profit (loss)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2024-01-01 -Paragraph 70 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2024-en-r&anchor=para_70_a&doctype=Standard -URIDate 2024-03-27 + Details
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