Stock-based compensation - Summarized Activity Related to Director Deferred Compensation Shares (Detail) - Directors - Deferred Compensation Share Equivalent Units shares in Thousands	9 Months Ended
	Jul. 31, 2024 $ / shares shares
Number of Shares
Outstanding, Beginning balance (in shares) | shares	78
Distributions (in shares) | shares	(14)
Outstanding, Ending balance (in shares) | shares	65
Dividend equivalents (in shares) | shares	1
Dividend equivalents (in dollars per share) | $ / shares	$ 249.14
Weighted-Average Grant Date  Fair Value
Beginning balance (in dollars per share) | $ / shares	93.11
Distributions (in dollars per share) | $ / shares	54.21
Ending balance (in dollars per share) | $ / shares	$ 103.73