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Stockholders' Equity - Amounts Reclassified Out of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Millions
 12 Months Ended
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)