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Share-based Payments - Summary of Stock Option Activity and Related Information (Detail) - Employee stock options [member] | 12 Months Ended
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Oct. 31, 2025 $ / shares shares | Oct. 31, 2024 $ / shares shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Number of options, outstanding at beginning of year | 15,967,581 | 14,688,079
Number of options, granted | 2,422,512 | 3,973,361
Number of options, exercised | (2,824,550) | (2,593,751)
Number of options, Forfeited/cancelled/expired | (44,171) | (100,108)
Number of options, outstanding at end of year | 15,521,372 | 15,967,581
Exercisable at end of year | 4,508,217 | 5,033,423
Number of options, available for grant | shares | 4,427,783 | 6,806,124
Weighted average exercise price, outstanding at beginning of year | $ 58.55 | $ 58.47
Weighted average exercise price, granted | 94.35 | 56.55
Weighted average exercise price, exercised | 54.71 | 52.72
Weighted average exercise price, Forfeited/cancelled/expired | 66.86 | 60.44
Weighted average exercise price, outstanding at end of year | 64.81 | 58.55
Weighted average exercise price, exercisable at end of year | $ 58.94 | $ 55.17

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- Definition The number of share options outstanding in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2024-01-01 -Paragraph 45 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_45_d&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2024-01-01 -Paragraph 45 -Subparagraph b -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_45_b_i&doctype=Standard -URIDate 2024-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2024-01-01 -Paragraph 45 -Subparagraph b -Clause vi -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_45_b_vi&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The number of share options exercisable in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2024-01-01 -Paragraph 45 -Subparagraph b -Clause vii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_45_b_vii&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The weighted average exercise price of share options exercisable in a share-based payment arrangement. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2024-01-01 -Paragraph 45 -Subparagraph b -Clause vii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_45_b_vii&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The weighted average exercise price of share options expired in a share-based payment arrangement. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2024-01-01 -Paragraph 45 -Subparagraph b -Clause v -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_45_b_v&doctype=Standard -URIDate 2024-03-27 + Details
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