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General - Statement of Shareholders' Equity (Details) - USD ($)
$ in Millions
Nov. 30, 2015
Nov. 30, 2014
Nov. 30, 2013
Nov. 30, 2012
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Retained earnings $ 23,771 $ 24,204 $ 24,492 $ 23,888
Retained earnings        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Retained earnings $ 20,060 19,158 18,718 18,438
As Previously Reported | Retained earnings        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Retained earnings   19,242 18,782 18,479
Adjustment | Retained earnings        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Retained earnings   $ (84) $ (64) $ (41)