General - Statement of Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Aug. 31, 2015	Aug. 31, 2014	Aug. 31, 2015	Aug. 31, 2014
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income	$ 1,216	$ 1,241	$ 1,487	$ 1,319
Total comprehensive income	$ 1,317	970	$ 725	1,130
Reclassification of Expense
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income		1,241		1,319
Total comprehensive income		970		1,130
As Previously Reported | Reclassification of Expense
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income		1,247		1,338
Total comprehensive income		976		1,149
Adjustment | Reclassification of Expense
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income		(6)		(19)
Total comprehensive income		$ (6)		$ (19)