Derivatives 1 (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Foreign Currency Contracts | Other Expenses, Net
Effect of foreign exchange derivatives
Amount of net (gain)/loss from derivative instruments recognized in the Condensed Consolidated Statements of Operations	$ 3	$ (8)	$ 6	$ 3