Restructuring Charges - Activity and Liability Balances (Detail) (Restructuring Plan Two Thousand Thirteen and Two Thousand Eleven [Member], USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Jul. 31, 2014	Oct. 31, 2013
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 19,098	$ 12,191
Charged to expense	12,537	28,509
Cash payments	(16,765)	(21,010)
Adjustments		(592)
Ending Balance	14,870	19,098
Workforce [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	12,159	5,335
Charged to expense	7,532	22,671
Cash payments	(13,936)	(15,847)
Adjustments		0
Ending Balance	5,755	12,159
Facility & Other [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	6,939	6,856
Charged to expense	5,005	5,838
Cash payments	(2,829)	(5,163)
Adjustments		(592)
Ending Balance	$ 9,115	$ 6,939