Other Income (Expense), Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Other Income (Expense), Net
Income from cash and cash investments	$ 1	$ 1	$ 2	$ 2
Income from financial investments, net (Note F)	1		7	2
Foreign currency transaction (losses) gains	(8)	5	(13)	5
Other items, net		1	2	1
Total other, net	$ (6)	$ 7	$ (2)	$ 10