Business Combinations (Pro Forma Condensed Combined Financial Information) (Details) (Engenio External Storage Systems Business [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
Apr. 27, 2012	Apr. 29, 2011
Engenio External Storage Systems Business [Member]
Business Acquisition [Line Items]
Net revenues	$ 6,241.6	$ 5,827.4
Net income	$ 611.9	$ 605.5

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=7659399&loc=d3e1392-128463

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration