Derivatives 1 (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Interest Rate Swaps | Fair Value Hedges | Interest Expense, Net
Effect of interest rate and foreign exchange derivatives
Amount of net (gain)/loss from derivative instruments recognized in the Condensed Consolidated Statements of Operations	$ 0	$ (2)	$ 0	$ (8)
Foreign Currency Contracts | Other Expenses, Net
Effect of interest rate and foreign exchange derivatives
Amount of net (gain)/loss from derivative instruments recognized in the Condensed Consolidated Statements of Operations	$ (3)	$ (10)	$ 0	$ (22)