Other Financial Data - Schedule of Other Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Other (Expense) Income
Foreign currency remeasurement gain (loss)	$ 2	$ 16	$ (14)	$ 33
Gain on disposal of business	0	0	41	20
Equity earnings	4	4	7	10
Income (loss) on financial instruments	3	(12)	(7)	(12)
Other	0	0	0	0
Total	$ 9	$ 8	$ 27	$ 51