Derivatives 1 (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Foreign Currency Contracts | Other (Gains) Expenses, Net
Effect of foreign exchange derivatives
Amount of net (gain)/loss from derivative instruments recognized in the Condensed Consolidated Statements of Operations	$ (9)	$ (3)	$ (3)	$ 0