Stock-based compensation - Summarized Activity Related to Restricted Stock Units (Detail) - Restricted Stock Unit shares in Thousands	9 Months Ended
	Jul. 31, 2023 $ / shares shares
Number of Shares
Beginning balance (in shares) | shares	81
Granted (in shares) | shares	39
Forfeited (in shares) | shares	(5)
Vested (in shares) | shares	(45)
Ending balance (in shares) | shares	70
Weighted-Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 223,770
Granted (in dollars per share) | $ / shares	237.18
Forfeited (in dollars per share) | $ / shares	241.37
Vested (in dollars per share) | $ / shares	219.06
Ending balance (in dollars per share) | $ / shares	$ 232.88