Other income (expense) (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Feb. 28, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Income and Expenses [Abstract]
Investment and interest income		$ 74	$ 65	$ 66
Foreign exchange gains (losses)		(57)	(173)	137
License fee income		92	111	128
Gains (losses) on sale of securities and affiliated companies		47	176	36
Miscellaneous income (loss)		(10)	(18)	(45)
Other income (expense)		$ 146	$ 161	$ 322
Third party logistics business, investment
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Realized Gain (Loss) on Disposal	$ 120
Equity Method Investment, Percentage Sold	35.00%