Other Financial Data - Schedule of Other Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Other (Expense) Income
Foreign currency remeasurement (loss) gain	$ (7)	$ (15)	$ 17	$ 4
Gain on disposal of business	1	0	20	0
Equity earnings	4	1	6	6
Income (loss) on financial instruments	3	9	0	(15)
Other	0	3	0	4
Total	$ 1	$ (2)	$ 43	$ (1)