Employee Benefit Plans (Employee Stock Purchase Plan) - Additional Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012	Apr. 02, 2014
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				5.0
Shares issued	1.8	2.1	2.0
Weighted average purchase price of stock purchased	$ 30.00	$ 22.75	$ 21.65
Shares reserved for future issuance under the ESPP	7.0