Interest Income and Other, Net - Summary of Interest Income and Other, Net (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Interest And Other Income [Abstract]
Net loss, realized and unrealized, on foreign exchange and foreign currency derivative contracts and other, net		$ (4)	$ (7)	$ (3)	$ (8)
Interest income				1	1
Gain on sale of business	[1]	17		17
Total		$ 13	$ (7)	$ 15	$ (7)

[1] Refer to “Note 3 – Acquisitions and Dispositions” in the notes to our unaudited consolidated financial statements in this Quarterly Report on Form 10-Q for additional information.