Other Income (Expense), Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Other Income and Expenses [Abstract]
Gain on sale of business	$ 0	$ 49	$ 0	$ 49
Income from cash and cash investments and short-term bank deposits	0	1	2	2
Equity investment income, net	2	1	2	1
Realized gains from private equity funds	0	1	0	2
Foreign currency transaction losses	(5)	(1)	(6)	0
Net periodic pension and post-retirement benefit cost	(5)	(8)	(9)	(15)
Total other, net	$ (8)	$ 43	$ (11)	$ 39