Other Financial Data - Schedule of Other Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Financial Data [Abstract]
Foreign currency remeasurement	$ 25	$ (37)	$ (2)
Disposal of business	(6)	(16)	39
Pension and other postretirement	1	(86)	(173)
Equity earnings	4	12	13
Financial instruments	(49)	2	(14)
Other income	$ (25)	$ (125)	$ (137)