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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, 2014
Dec. 31, 2013
Derivatives, Fair Value [Line Items]    
Derivative assets $ 65us-gaap_DerivativeAssets $ 30us-gaap_DerivativeAssets
Derivative liabilities 66us-gaap_DerivativeLiabilities 55us-gaap_DerivativeLiabilities
Derivative asset, current 64us-gaap_DerivativeAssetsCurrent 28us-gaap_DerivativeAssetsCurrent
Derivative asset, noncurrent 1us-gaap_DerivativeAssetsNoncurrent 2us-gaap_DerivativeAssetsNoncurrent
Total derivatives, hedge assets at fair value 65us-gaap_DerivativeAssets 30us-gaap_DerivativeAssets
Derivative liability, current 59us-gaap_DerivativeLiabilitiesCurrent 54us-gaap_DerivativeLiabilitiesCurrent
Derivative liability, noncurrent 7us-gaap_DerivativeLiabilitiesNoncurrent 1us-gaap_DerivativeLiabilitiesNoncurrent
Total derivatives, hedge liabilities at fair value 66us-gaap_DerivativeLiabilities 55us-gaap_DerivativeLiabilities
Number of interest rate derivatives held 0us-gaap_NumberOfInterestRateDerivativesHeld 0us-gaap_NumberOfInterestRateDerivativesHeld
Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Foreign exchange forward/options, hedge assets 27us-gaap_ForeignCurrencyFairValueHedgeAssetAtFairValue
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember		 16us-gaap_ForeignCurrencyFairValueHedgeAssetAtFairValue
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
Foreign exchange forwards/options, hedge liability at fair value 8us-gaap_ForeignCurrencyFairValueHedgeLiabilityAtFairValue
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember		 10us-gaap_ForeignCurrencyFairValueHedgeLiabilityAtFairValue
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
Commodity swaps/options, hedge assets at fair value 4us-gaap_PriceRiskFairValueHedgeAssetAtFairValue
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember		 8us-gaap_PriceRiskFairValueHedgeAssetAtFairValue
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
Commodity swaps/options, hedge liabilities at fair value 29us-gaap_PriceRiskFairValueHedgeLiabilityAtFairValue
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember		 13us-gaap_PriceRiskFairValueHedgeLiabilityAtFairValue
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
Total derivatives accounted for as hedges, hedge assets at fair value 31us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember		 24us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
Total derivatives accounted for as hedges, hedge liabilities at fair value 37us-gaap_DerivativeFairValueOfDerivativeLiability
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember		 23us-gaap_DerivativeFairValueOfDerivativeLiability
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
Maximum term of foreign exchange forwards/options, in months 17 months 14 months
Maximum term of commodity swaps/options, in months 36 months 36 months
Not Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Foreign exchange forwards/options, hedge assets at fair value 34us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember		 6us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
Foreign exchange forwards/options, hedge liabilities at fair value 29us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember		 32us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
Commodity swaps/options, hedge assets at fair value 0us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember		 0us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
Commodity swaps/options, hedge liabiilities at fair value 0us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember		 0us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
Total derivatives not accounted for as hedges, hedge assets at fair value 34us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember		 6us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
Total derivatives not accounted for as hedges, hedge liabilities at fair value 29us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember		 32us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
Maximum term of foreign exchange forwards/options, in months 10 months 12 months
Maximum term of commodity swaps/options, in months 4 months 4 months
Foreign Exchange Contract | Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Notional Amount 874us-gaap_DerivativeAssetNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeContractMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember		 744us-gaap_DerivativeAssetNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeContractMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
Foreign Exchange Contract | Not Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Notional Amount 2,358us-gaap_DerivativeAssetNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeContractMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember		 1,274us-gaap_DerivativeAssetNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeContractMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
Commodity Contract | Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Notional Amount 375us-gaap_DerivativeAssetNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember		 363us-gaap_DerivativeAssetNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
Commodity Contract | Not Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Notional Amount $ 8us-gaap_DerivativeAssetNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember		 $ 1us-gaap_DerivativeAssetNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember