Derivative Instruments (Gain (Loss) Recognized in AOCI) (Details) (Foreign Exchange Contract [Member], Designated as Hedging Instrument [Member], Cash Flow Hedge [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
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedge [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) recognized in Accumulated OCI (effective portion) for the Quarter Ended	$ (2)	$ 0	$ (8)	$ 0
Gain (Loss) reclassified into cost of services from Accumulated OCI (effective portion) for the Quarter Ended	0	0	0	0
Gain (loss) recognized in Other Income (Expense) (ineffective portion) for the Quarter Ended	$ 0	$ 0	$ 0	$ 0