Stock Repurchase Program - Stock Repurchase Activities (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Stock Repurchase Program
Purchases of treasury stock (in shares)	5,413	8,506	5,672
Average purchase price (in USD per share)	$ 70.21	$ 49.37	$ 45.84
Aggregate purchase price	$ 380,000	$ 420,000	$ 260,000
Reissuance of treasury stock	4,404	4,803	4,864