Variable Interest Entities - Assets and Liabilities of Consolidated VIEs Prior to Consolidation (Parenthetical) (Detail) (Securitization Vehicles [Member], USD $)
In Millions, unless otherwise specified
Aug. 31, 2014
Nov. 30, 2013
Securitization Vehicles [Member]
   
Variable Interest Entity [Line Items]    
Secured financing included in inventory and eliminated $ 37.9 $ 66.5