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Balance Sheet Details - Depreciation and Amortization Expense (Detail) - USD ($) $ in Millions | 12 Months Ended
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Apr. 29, 2016 | Apr. 24, 2015 | Apr. 25, 2014
Depreciation, Depletion and Amortization [Abstract] |  |  |
Depreciation and amortization expense | $ 212 | $ 243 | $ 275

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
Name: | us-gaap_DepreciationDepletionAndAmortization
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Balance Type: | debit
Period Type: | duration