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Derivative Instruments and Hedging Activities (Pre-Tax Gains (Losses) On Derivatives Designated As Hedging Instruments) (Details) (Designated As Hedging Instrument [Member], USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Derivative Instruments, Gains (Loss) [Line Items]        
Total amount recognized in earnings $ (76) $ 70 $ (131) $ 70
Interest Expense [Member]
       
Derivative Instruments, Gains (Loss) [Line Items]        
Interest contracts effective amount recognized in earnings 1 0 1 1
Net Sales And Other Operating Income [Member]
       
Derivative Instruments, Gains (Loss) [Line Items]        
Commodity Contracts effective amount recognized in earnings (2) 0 3 (5)
Cost Of Products Sold [Member]
       
Derivative Instruments, Gains (Loss) [Line Items]        
Commodity Contracts effective amount recognized in earnings (2) 89 (7) 83
Commodity contracts ineffective amount recognized in earnings (73) (18) (128) (8)
Other Income (Expense) - Net [Member]
       
Derivative Instruments, Gains (Loss) [Line Items]        
FX Contracts effective amount recognized in earnings $ 0 $ (1) $ 0 $ (1)