Derivative Instruments (Gain (Loss) on Derivatives) (Details) - Interest Rate Swap - Designated as Hedging Instrument - Fair Value Hedging - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Oct. 02, 2015	Oct. 03, 2014
Debt
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instrument, Gain (Loss) on Hedged Item	$ (7)	$ 1	$ (1)	$ (4)
Other Income (Expense)
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instrument, Gain (Loss)	$ 7	$ (1)	$ 1	$ 4