Stockholders' Equity - Amounts Reclassified Out of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jan. 29, 2021	Jan. 24, 2020	Jan. 29, 2021	Jan. 24, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Operating expenses	$ (717)	$ (673)	$ (2,204)	$ (2,014)
Other income (expense), net	11	(8)	50	(26)
Net revenues	1,470	1,404	4,189	4,011
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications	3	(1)	11	(16)
Reclassification out of Accumulated Other Comprehensive Income | Recognized Gains on Defined Benefit Obligations
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Operating expenses	0	(1)	0	(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	0	(14)
Reclassification out of Accumulated Other Comprehensive Income | Realized Losses on Cash Flow Hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues	$ 3	$ 0	$ 11	$ 0