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Securitization Activities - Activity Related to Securitizations Accounted for as Sales (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Feb. 28, 2013
Feb. 29, 2012
Securitization Vehicles [Line Items]    
Transferred assets $ 2,735.2 $ 2,036.8
Proceeds on new securitizations 2,751.3 2,046.9
Net revenues 12.9 8.0
Cash flows received on retained interests $ 32.3 $ 15.8