Stock-based compensation - Summarized Activity Related to Stock Options (Detail) - Stock Options $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Jul. 31, 2022 USD ($) $ / shares shares
Number of Options
Beginning balance (in shares) | shares	1,235
Granted (in shares) | shares	83
Exercised (in shares) | shares	(78)
Forfeited or expired (in shares) | shares	(17)
Ending balance (in shares) | shares	1,223
Expected to vest (in shares) | shares	372
Exercisable (in shares) | shares	849
Weighted- Average Exercise Price  Per Share
Beginning balance (in dollars per share) | $ / shares	$ 130.93
Granted (in dollars per share) | $ / shares	267.51
Exercised (in dollars per share) | $ / shares	115.65
Forfeited or expired (in dollars per share) | $ / shares	200.31
Ending balance (in dollars per share) | $ / shares	140.23
Expected to vest (in dollars per share) | $ / shares	185.00
Exercisable (in dollars per share) | $ / shares	$ 120.50
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Aggregate intrinsic value, outstanding | $	$ 113,724
Aggregate intrinsic value, expected to vest | $	19,836
Aggregate intrinsic value, exercisable | $	$ 93,792
Weighted average remaining term, outstanding	5 years 6 months
Weighted average remaining term, expected to vest	7 years 3 months 18 days
Weighted average remaining term, exercisable	4 years 8 months 12 days