Other Income (Expense), Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Other Income (Expense), Net
Income from cash and cash investments	$ 1		$ 1	$ 1
Income from financial investments, net (Note F)	4	$ 3	6	2
Foreign currency transaction (losses) gains	(4)	2	(5)
Other items, net	2	1	2
Total other net	$ 3	$ 6	$ 4	$ 3