Stock-based compensation - Summarized Activity Related to Stock Options (Detail) - Stock Options $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Jan. 31, 2023 USD ($) $ / shares shares
Number of Options
Beginning balance (in shares) | shares	1,187
Granted (in shares) | shares	78
Exercised (in shares) | shares	(73)
Forfeited or expired (in shares) | shares	(2)
Ending balance (in shares) | shares	1,190
Expected to vest (in shares) | shares	257
Exercisable (in shares) | shares	930
Weighted- Average Exercise Price  Per Share
Beginning balance (in dollars per share) | $ / shares	$ 141.82
Granted (in dollars per share) | $ / shares	240.01
Exercised (in dollars per share) | $ / shares	122.96
Forfeited or expired (in dollars per share) | $ / shares	132.92
Ending balance (in dollars per share) | $ / shares	148.33
Expected to vest (in dollars per share) | $ / shares	213.45
Exercisable (in dollars per share) | $ / shares	$ 130.05
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Aggregate intrinsic value, outstanding | $	$ 114,851
Aggregate intrinsic value, expected to vest | $	9,021
Aggregate intrinsic value, exercisable | $	$ 105,762
Weighted average remaining term, outstanding	5 years 4 months 24 days
Weighted average remaining term, expected to vest	7 years 10 months 24 days
Weighted average remaining term, exercisable	4 years 8 months 12 days