Stock-based compensation - Summarized Activity Related to Restricted Stock (Detail) - Restricted Stock shares in Thousands	9 Months Ended
	Jul. 31, 2022 $ / shares shares
Number of Shares
Beginning balance (in shares) | shares	19
Vested (in shares) | shares	(12)
Ending balance (in shares) | shares	7
Weighted-Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 157.36
Vested (in dollars per share) | $ / shares	153.64
Ending balance (in dollars per share) | $ / shares	$ 166.68