Derivative Instruments (Nondesignated Hedging) (Details) - Not Designated as Hedging Instrument - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Oct. 02, 2015	Oct. 03, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, pretax amounts affecting income	$ (5)	$ (5)	$ (2)	$ 0
Interest Rate Swap | Cost of Services and Selling, General and Administrative Expenses
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, pretax amounts affecting income	(3)	0	(3)	4
Foreign Currency Forward and Option Contracts | Other Income (Expense)
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, pretax amounts affecting income	$ (2)	$ (5)	$ 1	$ (4)