Financial Instruments - Economic Hedges (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Embedded derivatives, loss	$ 7	$ 3	$ 76
Derivatives not designated as hedging instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	(24)	(4)	122
Derivatives not designated as hedging instruments | Currency exchange contracts | Cost of goods sold
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gains (losses) from derivatives	(6)	(12)	76
Derivatives not designated as hedging instruments | Currency exchange contracts | Selling, general and administrative
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gains (losses) from derivatives	(22)	9	45
Derivatives not designated as hedging instruments | Commodity derivatives | Cost of goods sold
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gains (losses) from derivatives	2	(1)	1
Derivatives not designated as hedging instruments | Other derivatives | Other non operating income (loss), net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gains (losses) from derivatives	$ 2	$ 0	$ 0