Employee Benefit Plans (Employee Stock Purchase Plan) - Additional Information (Detail) - $ / shares shares in Millions	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015	Mar. 29, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Threshold for employee stock purchases under ESPP, maximum value	85.00%
ESPP offering period (in years)	2 years
Increase in number of shares authorized for issuance under plan (in shares)				5.0
Shares issued (in shares)	1.6	1.6	1.7
Weighted average purchase price of stock purchased (in USD per share)	$ 40.85	$ 37.77	$ 31.55
Shares reserved for future issuance under the ESPP (in shares)	7.1