General - Statement of Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income	$ 222	$ 98	$ 271	$ 78
Total comprehensive income	$ 82	68	$ (592)	160
Reclassification of Expense
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income		98		78
Total comprehensive income		68		160
As Previously Reported | Reclassification of Expense
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income		106		91
Total comprehensive income		76		173
Adjustment | Reclassification of Expense
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income		(8)		(13)
Total comprehensive income		$ (8)		$ (13)