Other Income (Expense), Net (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Other Income and Expenses [Abstract]
Income from cash and cash investments and short-term bank deposits	$ 1	$ 2
Foreign currency transaction losses	0	(1)
Net periodic pension and post-retirement benefit cost	(5)	(4)
Total other, net	$ (4)	$ (3)