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Derivative Instruments and Hedging Activities (Pre-Tax Gains (Losses) On Derivatives Not Designated As Hedging Instruments) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Derivative [Line Items]        
Total gain (loss) recognized in earnings $ (226) $ 432    
Not Designated As Hedging Instrument [Member]        
Derivative [Line Items]        
Total gain (loss) recognized in earnings     $ (60) $ (451)
Other Income (Expense) - Net [Member]        
Derivative [Line Items]        
FX Contracts 31 (15) 8 (24)
Revenues [Member]        
Derivative [Line Items]        
FX Contracts (12) (2) 8 (8)
Cost Of Products Sold [Member]        
Derivative [Line Items]        
FX Contracts 6 44 (63) 88
Commodity Contracts $ (251) $ 405 $ (13) $ (507)