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Fair Value Measurements and Derivatives - Location and Amount of Gain or (Loss) Recognized in Income on Cash Flow Hedging Relationships (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net sales	$ 1,973	$ 1,978	$ 2,054	$ 2,138	$ 1,837	$ 1,831	$ 1,840	$ 1,701	$ 8,143	$ 7,209	$ 5,826
Cost of sales									6,986	6,143	4,991
Other income (expense), net									(29)	$ (16)	$ 22
Cash Flow Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Reclassification from AOCI									(56)
Cash Flow Hedging [Member] \| Forward Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Reclassification from AOCI									(1)
Cash Flow Hedging [Member] \| Forward Contracts [Member] \| Cost of Sales [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Reclassification from AOCI									(1)
Cash Flow Hedging [Member] \| Currency Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Reclassification from AOCI									(55)
Cash Flow Hedging [Member] \| Currency Swap [Member] \| Other Income (Expense), Net [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Reclassification from AOCI									$ (55)