Other Financial Data - Schedule of Other Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Other (Expense) Income
Foreign currency remeasurement (loss) gain	$ 16	$ 7	$ 33	$ 11
Gain on disposal of business	0	25	20	25
Equity earnings	4	4	10	10
Income (loss) on financial instruments	(12)	(2)	(12)	(17)
Other	0	(1)	0	(5)
Total	$ 8	$ 35	$ 51	$ 34