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Stockholders' Equity - Amounts Reclassified Out of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions | 12 Months Ended
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Apr. 27, 2018 | Apr. 28, 2017 | Apr. 29, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Operating expenses | $ 2,574 | $ 2,725 | $ 3,025
Other income (expense), net | 41 | 0 | (3)
Net revenues | 5,911 | 5,519 | 5,546
Reclassification out of Accumulated Other Comprehensive Income |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Total reclassifications | (2) | (5) | 2
Reclassification out of Accumulated Other Comprehensive Income | Recognized (Gains) Losses on Defined Benefit Obligations |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Operating expenses | (2) | 1 | 2
Reclassification out of Accumulated Other Comprehensive Income | Realized Gains on Available-for-Sale Securities |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Other income (expense), net | 0 | 0 | (1)
Reclassification out of Accumulated Other Comprehensive Income | Realized (Gains) Losses on Cash Flow Hedges |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Net revenues | $ 0 | $ (6) | $ 1

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