Goodwill and Intangible Assets - Summary of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jan. 31, 2015
Goodwill [Roll Forward]
As of October 31, 2014	$ 2,255,708	[1]
Additions	0
Effect of foreign currency translation	(9,788)
As of January 31, 2015	$ 2,245,920

[1] Derived from audited financial statements.