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Hedges and Derivative Financial Instruments (Schedule of Outstanding Derivative Contracts) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Derivatives, Fair Value [Line Items]    
Derivative Assets $ 30 $ 30
Derivative Liabilities 55 44
Derivative Asset, Current 28 26
Derivative Asset, Noncurrent 2 4
Total derivatives, hedge assets at fair value 30 30
Derivative Liability, Current 54 43
Derivative Liability, Noncurrent 1 1
Total derivatives, hedge liabilities at fair value 55 44
Number of Interest Rate Derivatives Held 0 0
Designated as Hedging Instrument
    
Derivatives, Fair Value [Line Items]    
Foreign exchange forward/options, hedge assets 16 8
Foreign Exchange Forwards/Options, Hedge Liability at Fair Value 10 12
Commodity Swaps/Options, Hedge Assets at Fair Value 8 11
Commodity Swaps/Options, Hedge Liabilities at Fair Value 13 9
Total derivatives accounted for as hedges, hedge assets at fair value 24 19
Total derivatives accounted for as hedges, hedge liabilities at fair value 23 21
Maximum term of foreign exchange forwards/options, in months 14 months 18 months
Maximum term of commodity swaps/options, in months 36 months 24 months
Not Designated as Hedging Instrument
    
Derivatives, Fair Value [Line Items]    
Foreign Exchange Forwards/Options, Hedge Assets at Fair Value 6 11
Foreign Exchange Forwards/Options, Hedge Liabilities at Fair Value 32 23
Commodity swaps/options, hedge assets at fair value 0 0
Commodity Swaps/Options, hedge liabiilities at Fair Value 0 0
Total derivatives not accounted for as hedges, hedge assets at fair value 6 11
Total derivatives not accounted for as hedges, hedge liabilities at fair value 32 23
Maximum term of foreign exchange forwards/options, in months 12 months 13 months
Maximum term of commodity swaps/options, in months 4 months 12 months
Foreign Exchange Contract | Designated as Hedging Instrument
    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Notional Amount 744 1,101
Foreign Exchange Contract | Not Designated as Hedging Instrument
    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Notional Amount 1,274 1,522
Commodity Contract | Designated as Hedging Instrument
    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Notional Amount 363 354
Commodity Contract | Not Designated as Hedging Instrument
    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Notional Amount $ 1 $ 6