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Employee Compensation - Share-Based Compensation - Summary of Information about our Stock Option Plan (Detail)
 12 Months Ended
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