Basis of Presentation - Additional Information (Detail) (USD $) In Millions	3 Months Ended		6 Months Ended
	May 31, 2011	May 31, 2010	May 31, 2011	May 31, 2010
Basis of Presentation [Line Items]
Adjustment amounts on gross basis in revenues and expenses	$ 95	$ 72	$ 203	$ 155