Hedges and Derivative Financial Instruments (Schedule of Outstanding Derivative Contracts) (Details) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Fair value of hedge assets	$ 144,000,000	$ 77,000,000
Fair value of hedge liabilities	139,000,000	144,000,000
Derivative asset, current	55,000,000	60,000,000
Derivative asset, noncurrent	89,000,000	17,000,000
Derivative liability, current	61,000,000	95,000,000
Derivative liability, noncurrent	78,000,000	49,000,000
Derivative asset	144,000,000	77,000,000
Derivative liability	139,000,000	144,000,000
Derivatives accounted for as hedges
Derivatives, Fair Value [Line Items]
Fair value of hedge assets	129,000,000	50,000,000
Fair value of hedge liabilities	117,000,000	75,000,000
Derivatives accounted for as hedges \| Commodity swaps/options
Derivatives, Fair Value [Line Items]
Notional amount	174,000,000	216,000,000
Fair value of hedge assets	4,000,000	1,000,000
Fair value of hedge liabilities	$ 10,000,000	$ 27,000,000
Maximum term of commodity swaps/options, in months	21 months	30 months
Derivatives accounted for as hedges \| Foreign exchange forwards/options
Derivatives, Fair Value [Line Items]
Notional amount	$ 3,177,000,000	$ 3,126,000,000
Fair value of hedge assets	94,000,000	49,000,000
Fair value of hedge liabilities	$ 84,000,000	$ 48,000,000
Maximum term of foreign exchange forwards/options, in months	32 months	44 months
Derivatives accounted for as hedges \| Cross-currency swaps
Derivatives, Fair Value [Line Items]
Notional amount	$ 1,275,000,000	$ 0
Fair value of hedge assets	25,000,000	0
Fair value of hedge liabilities	$ 23,000,000	$ 0
Maximum term of cross-currency swaps, in months	110 months	0 months
Derivatives accounted for as hedges \| Interest rate derivatives
Derivatives, Fair Value [Line Items]
Notional amount	$ 300,000,000	$ 0
Fair value of hedge assets	6,000,000	0
Fair value of hedge liabilities	$ 0	$ 0
Maximum term of interest rate derivatives, in months	65 months	0 months
Derivatives not accounted for as hedges
Derivatives, Fair Value [Line Items]
Fair value of hedge assets	$ 15,000,000	$ 27,000,000
Fair value of hedge liabilities	22,000,000	69,000,000
Derivatives not accounted for as hedges \| Commodity swaps/options
Derivatives, Fair Value [Line Items]
Notional amount	1,000,000	3,000,000
Fair value of hedge assets	0	0
Fair value of hedge liabilities	$ 0	$ 0
Maximum term of commodity swaps/options, in months	7 months	0 months
Derivatives not accounted for as hedges \| Foreign exchange forwards/options
Derivatives, Fair Value [Line Items]
Notional amount	$ 3,182,000,000	$ 4,382,000,000
Fair value of hedge assets	15,000,000	27,000,000
Fair value of hedge liabilities	$ 22,000,000	$ 69,000,000
Maximum term of foreign exchange forwards/options, in months	12 months	21 months

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