Other Income (Expense), Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Investment [Line Items]
Gain on sale of business	$ 0	$ 2	$ 0	$ 51
Income from cash and cash investments and short-term bank deposits	1	1	3	3
Equity investment income, net	0	0	2	1
Realized gains from private equity funds	0	0	0	2
Impairment of private equity funds	0	(2)	0	(2)
Foreign currency transaction gains (losses)	1	3	(5)	3
Net periodic pension and post-retirement benefit cost	(2)	(7)	(11)	(22)
Other items, net	0	1	0	1
Total other, net	$ 0	$ (2)	$ (11)	$ 37