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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. 28, 2017 | Apr. 29, 2016 | Apr. 24, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Operating expenses | $ 2,725 | $ 3,025 | $ 3,117
Other expense, net | 0 | (3) | (3)
Net revenues | 5,519 | 5,546 | 6,123
Reclassification out of Accumulated Other Comprehensive Income |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Total reclassifications | (5) | 2 | (14)
Reclassification out of Accumulated Other Comprehensive Income | Recognized Losses on Defined Benefit Obligations |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Operating expenses | 1 | 2 | 0
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 expense, net | 0 | (1) | 0
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 | $ (6) | $ 1 | $ (14)

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