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Stockholders' Equity - Amounts Reclassified Out of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Millions
 12 Months Ended
Apr. 29, 2016
Apr. 24, 2015
Apr. 25, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Operating expenses $ 3,025 $ 3,117 $ 3,185
Other income (expense), net 0 2 8
Net revenues 5,546 6,123 6,325
Net income 229 560 638
Reclassification out of Accumulated Other Comprehensive Income      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Net income 2 (14) 1
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 2 0 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 income (expense), net (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 $ (14) $ 2