Goodwill And Intangible Assets (Schedule Of Intangible Assets, Net) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended	12 Months Ended
	Sep. 28, 2012	Mar. 30, 2012
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 4,598	$ 4,651
Accumulated Amortization	(3,443)	(3,314)
Net Carrying Amount	1,155	1,337	[1]
Weighted average estimated useful life (in years)	2 years	3 years
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,215	2,219
Accumulated Amortization	(1,634)	(1,499)
Net Carrying Amount	581	720
Weighted average estimated useful life (in years)	2 years	3 years
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,914	1,914
Accumulated Amortization	(1,689)	(1,654)
Net Carrying Amount	225	260
Weighted average estimated useful life (in years)	4 years	4 years
Finite-Lived Tradenames [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	146	146
Accumulated Amortization	(103)	(96)
Net Carrying Amount	43	50
Weighted average estimated useful life (in years)	3 years	3 years
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	26	75
Accumulated Amortization	(17)	(65)
Net Carrying Amount	9	10
Weighted average estimated useful life (in years)	5 years	6 years
Indefinite-Lived Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	297	297
Accumulated Amortization
Net Carrying Amount	$ 297	$ 297

[1] Derived from audited financial statements