Earnings per Share and Stock-Based Compensation - Schedule of Activity Related to Performance Based Equity Instruments (Detail)	9 Months Ended
	Jul. 31, 2014
Activity related to these performance-based equity instruments
Outstanding, October 31, 2013	8,829,618
Granted	275,000
Exercised	(1,024,166)
Canceled	(975,250)
Outstanding, July 31, 2014	7,105,202
Performance Options [Member]
Activity related to these performance-based equity instruments
Outstanding, October 31, 2013	688,000
Granted	0
Exercised	(12,000)
Canceled	(36,000)
Outstanding, July 31, 2014	640,000
Performance Restricted Stock Units [Member]
Activity related to these performance-based equity instruments
Outstanding, October 31, 2013	11,675,782
Granted	300,000
Exercised	0
Canceled	(30,937)
Outstanding, July 31, 2014	11,944,845