Stock Repurchase Program - Stock Repurchase Activities (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Stock Repurchase Program
Purchases of treasury stock (in shares)	4,688	5,413	8,506
Average purchase price (in USD per share)	$ 89.59	$ 70.21	$ 49.37
Aggregate purchase price	$ 420,000	$ 380,000	$ 400,000
Reissuance of treasury stock	3,508	4,404	4,803
Treasury Stock
Stock Repurchase Program
Aggregate purchase price	$ 420,000	$ 380,000	$ 420,000