Derivatives and Hedging Instruments - Gain (Loss) on Derivatives Not Designated as Hedging Instruments (Details) (Other (Expense) Income, Net [Member], Foreign Exchange Derivative [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Other (Expense) Income, Net [Member] | Foreign Exchange Derivative [Member]
Derivative [Line Items]
Amount of Gain (Loss) Recognized in the Condensed Consolidated Statement of Operations	$ (1)	$ (3)