Summary of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Apr. 30, 2014
Goodwill And Intangible Assets [Abstract]
Beginning Balance	$ 1,975,971	[1]
Additions	286,323
Effect of foreign currency translation	(7,840)
Ending balance	$ 2,254,454

[1] Derived from audited financial statements.