Quarterly Financial Information (Unaudited) - Schedule of Quarterly Financial Information (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jan. 31, 2014	Oct. 31, 2013
Condensed Financial Information Of Parent Company Only Disclosure [Abstract]
Development success fee related to purchase recognized as revenues	$ 12.8	$ 14.3