Goodwill and Other Intangible Assets (Other Intangible Assets) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 28, 2012	Dec. 30, 2011	Mar. 30, 2012
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Value	$ 4,175		$ 4,175		$ 4,531
Accumulated Amortization	2,767		2,767		3,027
Net Carrying Value	1,408		1,408		1,504
Amortization expense	106	112	308	334
Outsourcing Contract Costs Amortization Expense	9	12	31	37
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
Remainder of 2013	105		105
2014	316		316
2015	253		253
2016	171		171
2017	128		128
Outsourcing contract costs
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Value	1,490		1,490		1,802
Accumulated Amortization	958		958		1,240
Net Carrying Value	532		532		562
Software
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Value	2,171		2,171		2,130
Accumulated Amortization	1,543		1,543		1,481
Net Carrying Value	628		628		649
Customer and other intangible assets
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Value	514		514		599
Accumulated Amortization	266		266		306
Net Carrying Value	248		248		293
Internal-use software [Member] | Software
Finite-Lived Intangible Assets, Net [Abstract]
Amortization expense	$ 52	$ 42	$ 148	$ 149