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, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net sales	$ 1,987	$ 2,164	$ 2,306	$ 2,163	$ 1,973	$ 1,978	$ 2,054	$ 2,138	$ 8,620	$ 8,143	$ 7,209
Cost of sales									7,489	6,986	6,143
Other expense, net									25	29	$ 16
Cash Flow Hedging [Member] | Forward Contracts [Member] | Cost of Sales [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Reclassification from AOCI									(9)	(1)
Cash Flow Hedging [Member] | Currency Swap [Member] | Other Income (Expense), Net [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Reclassification from AOCI									$ (24)	$ (55)