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Employee Compensation - Share-Based Compensation - Summary of Information about our Stock Option Plan (Detail) | 12 Months Ended
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Oct. 31, 2025 shares $ / shares | Oct. 31, 2024 shares $ / shares
Disclosure Of Number And Weighted Average Exercise Prices Of Share Options and awards [Line Items] |  |
Weighted-average exercise price,Granted | $ / shares | $ 141 | $ 118.5
Employee Stock Options [Member] |  |
Disclosure Of Number And Weighted Average Exercise Prices Of Share Options and awards [Line Items] |  |
Number of stock options, Outstanding at beginning of year | shares | 6,554,492 | 6,312,576
Number of stock options, Granted | shares | 716,633 | 1,113,853
Number of stock options, Exercised | shares | (1,520,631) | (811,652)
Number of stock options, Forfeited/cancelled | shares | (51,360) | (60,285)
Number of stock options, Outstanding at end of year | shares | 5,699,134 | 6,554,492
Number of stock options, Exercisable at end of year | shares | 2,245,942 | 2,856,460
Number of stock options, Available for grant | shares | 8,900,641 | 9,565,914
Weighted-average exercise price, Outstanding at beginning of year | $ / shares | $ 110.14 | $ 105.26
Weighted-average exercise price,Granted | $ / shares | 141 | 118.5
Weighted-average exercise price,Exercised | $ / shares | 95.74 | 82.74
Weighted-average exercise price,Forfeited/cancelled | $ / shares | 122.96 | 122.22
Weighted-average exercise price,Outstanding at end of year | $ / shares | 117.75 | 110.14
Weighted-average exercise price,Exercisable at end of year | $ / shares | $ 103.82 | $ 95.27

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