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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Apr. 29, 2016 | Apr. 24, 2015 | Apr. 25, 2014 | Apr. 26, 2013
Income Tax Contingency [Line Items] |  |  |  |
Deferred tax assets, increase/decrease in valuation allowance | $ 1 | $ 8 |  |
Operating loss and credit carryforwards, expiration dates range, minimum | 2018 |  |  |
Operating loss and credit carryforwards, expiration dates range, maximum | 2036 |  |  |
Gross unrecognized tax benefits | $ 216 | 272 | $ 236 | $ 190
Unrecognized tax benefits included in other long-term liabilities | 164 |  |  |
Unrecognized tax benefits that would affect provision for income taxes | 147 |  |  |
Tax penalties and interest on unrecognized tax benefits | 2 | 4 | 2 |
Accrued tax penalties and interest on unrecognized tax benefits | 11 | 9 |  |
Resolution of income tax examinations | 20 | 46 | 0 |
Accumulated unremitted earnings from foreign subsidiaries | 4,000 |  |  |
Estimated unrecognized deferred tax liability on unremitted earnings of foreign subsidiaries | 1,000 |  |  |
Federal Income Tax |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Operating loss carry forwards | 15 |  |  |
Tax credit carry forward amount | 40 |  |  |
Resolution of income tax examinations | 23 | 47 |  |
Germany |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Resolution of income tax examinations | (2) |  |  |
State and Local Income Tax |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Operating loss carry forwards | 31 |  |  |
Tax credit carry forward amount | 131 |  |  |
Foreign Income Tax |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Tax credit carry forward amount | 22 |  |  |
Additional Paid-in Capital |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Unrecognized tax benefits | 41 |  |  |
SolidFire |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Tax charge from integration of intellectual properties from the SolidFire acquisition | $ 64 | $ 0 | $ 0 |

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- Definition Amount of deferred tax liability not recognized because of the exceptions to comprehensive recognition of deferred taxes related to undistributed earnings of foreign subsidiaries. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331 + Details
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