Balance Sheet Details - Product Warranty Liabilities (Detail) - USD ($) $ in Millions	12 Months Ended
	Apr. 28, 2017	Apr. 29, 2016	Apr. 28, 2017	Apr. 29, 2016
Movement In Standard Product Warranty Accrual [Roll Forward]
Balance at beginning of period	$ 70	$ 86
Expense accrued during the period	17	35
Warranty costs incurred	(37)	(51)
Balance at end of period	50	70
Standard Product Warranty Accrual, Balance Sheet Classification [Abstract]
Accrued expenses			$ 33	$ 48
Other long-term liabilities			17	22
Total warranty liabilities	$ 70	$ 70	$ 50	$ 70