Goodwill and Other Intangible Assets (Goodwill) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
Jan. 02, 2015	Mar. 28, 2014
Changes in the carrying amount of goodwill by segment [Roll Forward]
Goodwill Gross	$ 4,431us-gaap_GoodwillGross
Accumulated impairment losses	(2,764)
Balance as of March 28, 2014, net	1,669us-gaap_Goodwill	1,667us-gaap_Goodwill
Additions	31us-gaap_GoodwillAcquiredDuringPeriod
Deductions	2
Foreign currency translation	(27)
Goodwill Gross	4,433us-gaap_GoodwillGross
Accumulated impairment losses	(2,764)
Balance as of January 2, 2015, net	1,669us-gaap_Goodwill	1,667us-gaap_Goodwill
GBS [Member]
Changes in the carrying amount of goodwill by segment [Roll Forward]
Goodwill Gross	1,370
Accumulated impairment losses	(690)
Balance as of March 28, 2014, net	651	680
Additions	0
Deductions	2
Foreign currency translation	(27)
Goodwill Gross	1,341
Accumulated impairment losses	(690)
Balance as of January 2, 2015, net	651	680
GIS [Member]
Changes in the carrying amount of goodwill by segment [Roll Forward]
Goodwill Gross	2,273
Accumulated impairment losses	(2,074)
Balance as of March 28, 2014, net	199	199
Additions	0
Deductions	0
Foreign currency translation	0
Goodwill Gross	2,273
Accumulated impairment losses	(2,074)
Balance as of January 2, 2015, net	199	199
NPS [Member]
Changes in the carrying amount of goodwill by segment [Roll Forward]
Goodwill Gross	788
Accumulated impairment losses	0
Balance as of March 28, 2014, net	819	788
Additions	31
Deductions	0
Foreign currency translation	0
Goodwill Gross	819
Accumulated impairment losses	0
Balance as of January 2, 2015, net	$ 819	$ 788

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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+ References

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Amount of increase (decrease) from foreign currency translation adjustments and purchase accounting adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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