Derivative Instruments (Gain (Loss) on Derivatives) (Details) (Interest Rate Swap [Member], Designated as Hedging Instrument [Member], Fair Value Hedging [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
Debt [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instrument, Gain (Loss) on Hedged Item	$ (6)	$ 6	$ (10)	$ 0
Other Income (Expense) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instrument, Gain (Loss)	$ 6	$ (6)	$ 10	$ 0