Restatement and Adjustment of Consolidated Financial Statements - Goodwill Impairment (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Mar. 28, 2014	Mar. 29, 2013	Mar. 30, 2012	Apr. 01, 2011
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Goodwill impairment	$ 0	$ 0	$ (232)
Miscellaneous errors [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Goodwill impairment			(232)	(2,511)
Miscellaneous errors [Member] | Scenario, Previously Reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Goodwill impairment			(2,745)	0
Miscellaneous errors [Member] | Restatement Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Goodwill impairment			2,513	(2,511)
Change in net income			(3,901)
GIS Segment [Member] | Miscellaneous errors [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Goodwill impairment			0	(2,061)
GIS Segment [Member] | Miscellaneous errors [Member] | Scenario, Previously Reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Goodwill impairment			(2,074)	0
GIS Segment [Member] | Miscellaneous errors [Member] | Restatement Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Goodwill impairment			2,074	(2,061)
GBS - Consulting [Member] | Miscellaneous errors [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Goodwill impairment			0	(450)
GBS - Consulting [Member] | Miscellaneous errors [Member] | Scenario, Previously Reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Goodwill impairment			(453)	0
GBS - Consulting [Member] | Miscellaneous errors [Member] | Restatement Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Goodwill impairment			453	(450)
GBS - IS&S [Member] | Miscellaneous errors [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Goodwill impairment			(232)	0
GBS - IS&S [Member] | Miscellaneous errors [Member] | Scenario, Previously Reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Goodwill impairment			(218)	0
GBS - IS&S [Member] | Miscellaneous errors [Member] | Restatement Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Goodwill impairment			(14)	0
Timing of Asset Impairment Charge [Member] | NHS contract [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Change in net income			$ (2,513)