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Stockholders' Equity - Amounts Reclassified Out of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Oct. 28, 2016 | Oct. 30, 2015 | Oct. 28, 2016 | Oct. 30, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Operating expenses | $ 687 | $ 739 | $ 1,391 | $ 1,581
Other income (expense), net | 0 | (1) | (1) | 3
Net revenues | 1,340 | 1,445 | 2,634 | 2,780
Total reclassifications | 0 | 1 | 0 | 3
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 | 1 | 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 | (1) | 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 | $ (1) | $ 1 | $ (1) | $ 2

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