Derivative Instruments (Nondesignated Hedging) (Details) (Not Designated as Hedging Instrument [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Jan. 02, 2015	Dec. 27, 2013	Jan. 02, 2015	Dec. 27, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, pretax amounts affecting income	$ 3	$ 2	$ 2	$ (14)
Total return swaps [Member] | Cost of Services and Selling, General and Administrative Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, pretax amounts affecting income	3	0	7	0
Foreign Currency Forward and Option Contracts [Member] | Other Income (Expense) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, pretax amounts affecting income	$ 0	$ 2	$ (5)	$ (14)