Hedges and Derivative Financial Instruments - Schedule of Outstanding Derivative Contracts (Details) - USD ($)	6 Months Ended	12 Months Ended
Jun. 30, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Fair value of hedged assets	$ 81,000,000	$ 77,000,000
Fair value of hedged liabilities	124,000,000	144,000,000
Derivative asset at fair value, current	40,000,000	60,000,000
Derivative asset at fair value, noncurrent	41,000,000	17,000,000
Total derivatives, hedge assets at fair value	81,000,000	77,000,000
Derivative liability at fair value, current	52,000,000	95,000,000
Derivative liability at fair value, noncurrent	72,000,000	49,000,000
Total derivatives, hedge liabilities at fair value	124,000,000	144,000,000
Derivatives accounted for as hedges
Derivatives, Fair Value [Line Items]
Fair value of hedged assets	61,000,000	50,000,000
Fair value of hedged liabilities	101,000,000	75,000,000
Derivatives accounted for as hedges \| Foreign exchange forwards/options
Derivatives, Fair Value [Line Items]
Notional Amount	3,108,000,000	3,126,000,000
Fair value of hedged assets	43,000,000	49,000,000
Fair value of hedged liabilities	$ 44,000,000	$ 48,000,000
Maximum term of foreign exchange forwards/options	38 months	44 months
Derivatives accounted for as hedges \| Commodity swaps/options
Derivatives, Fair Value [Line Items]
Notional Amount	$ 235,000,000	$ 216,000,000
Fair value of hedged assets	4,000,000	1,000,000
Fair value of hedged liabilities	$ 21,000,000	$ 27,000,000
Maximum term of commodity swaps/options	24 months	30 months
Derivatives accounted for as hedges \| Interest rate derivatives
Derivatives, Fair Value [Line Items]
Notional Amount	$ 700,000,000	$ 0
Fair value of hedged assets	14,000,000	0
Fair value of hedged liabilities	$ 36,000,000	$ 0
Maximum term of commodity swaps/options	116 months	0 months
Derivatives not accounted for as hedges
Derivatives, Fair Value [Line Items]
Fair value of hedged assets	$ 20,000,000	$ 27,000,000
Fair value of hedged liabilities	23,000,000	69,000,000
Derivatives not accounted for as hedges \| Foreign exchange forwards/options
Derivatives, Fair Value [Line Items]
Notional Amount	2,804,000,000	4,382,000,000
Fair value of hedged assets	20,000,000	27,000,000
Fair value of hedged liabilities	$ 23,000,000	$ 69,000,000
Maximum term of foreign exchange forwards/options	15 months	21 months
Derivatives not accounted for as hedges \| Commodity swaps/options
Derivatives, Fair Value [Line Items]
Notional Amount	$ 4,000,000	$ 3,000,000
Fair value of hedged assets	0	0
Fair value of hedged liabilities	$ 0	$ 0
Maximum term of commodity swaps/options	24 months	0 months

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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