Certain Litigation Charges, Net (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended	3 Months Ended	12 Months Ended
Apr. 26, 2013	Apr. 27, 2012	Apr. 29, 2011	Apr. 26, 2013 Litigation with Edwards Lifesciences, Inc.	Apr. 27, 2012 Federal Securities Class Action Initiated by Minneapolis Firefighters' Relief Association	Apr. 27, 2012 Federal Securities Class Action Initiated by Minneapolis Firefighters' Relief Association	Apr. 29, 2011 Sprint Fidelis Litigation Matters
Loss Contingencies
Certain litigation charges, net	$ 245	$ 90	$ 245	$ 245		$ 90	$ 245
Settlement consideration					85	85	221
Litigation fees					$ 5

The net proceeds or assets obtained in excess of (less than) the net carrying amount of assets recorded, or assets distributed and liabilities assumed less than (in excess of) estimated litigation liability extinguished, in settlement of a litigation matter. Represents (for other than an insurance entity in its normal claims settlement process), the amount of income (expense) recognized in the period to settle pending or threatened litigation and insurance claims.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14326-108349

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 5

-Paragraph 9, 10, 11, 12

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Balance Type:	credit
Period Type:	duration