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Hedges and Derivative Financial Instruments - Schedule of Outstanding Derivative Contracts (Details) - USD ($)
$ in Millions
 9 Months Ended 12 Months Ended
Sep. 30, 2017
Dec. 31, 2016
Derivatives, Fair Value [Line Items]    
Fair value of hedged assets $ 61 $ 78
Fair value of hedged liabilities 145 37
Derivative asset at fair value, current 52 54
Derivative asset at fair value, noncurrent 9 24
Total derivatives, hedge assets at fair value 61 78
Derivative liability at fair value, current 82 35
Derivative liability at fair value, noncurrent 63 2
Total derivatives, hedge liabilities at fair value 145 37
Derivatives accounted for as hedges    
Derivatives, Fair Value [Line Items]    
Fair value of hedged assets 37 39
Fair value of hedged liabilities 109 21
Derivatives accounted for as hedges | Foreign exchange forwards/options    
Derivatives, Fair Value [Line Items]    
Notional Amount 3,257 1,813
Fair value of hedged assets 9 32
Fair value of hedged liabilities $ 108 $ 10
Maximum term of foreign exchange forwards/options 59 months 58 months
Derivatives accounted for as hedges | Commodity swaps/options    
Derivatives, Fair Value [Line Items]    
Notional Amount $ 280 $ 299
Fair value of hedged assets 28 7
Fair value of hedged liabilities $ 1 $ 11
Maximum term of commodity swaps/options 39 months 36 months
Derivatives not accounted for as hedges    
Derivatives, Fair Value [Line Items]    
Fair value of hedged assets $ 24 $ 39
Fair value of hedged liabilities 36 16
Derivatives not accounted for as hedges | Foreign exchange forwards/options    
Derivatives, Fair Value [Line Items]    
Notional Amount 3,190 3,262
Fair value of hedged assets 24 39
Fair value of hedged liabilities $ 36 $ 16
Maximum term of foreign exchange forwards/options 36 months 35 months
Derivatives not accounted for as hedges | Commodity swaps/options    
Derivatives, Fair Value [Line Items]    
Notional Amount $ 1 $ 2
Fair value of hedged assets 0 0
Fair value of hedged liabilities $ 0 $ 0
Maximum term of commodity swaps/options 8 months 2 months