Other Income (Expense), Net (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 27, 2017	Oct. 28, 2016	Oct. 27, 2017	Oct. 28, 2016
Nonoperating Income Expense [Abstract]
Interest income	$ 19	$ 10	$ 35	$ 21
Interest expense	(17)	(12)	(30)	(27)
Other income, net	4	2	6	5
Total other income (expense), net	$ 6	$ 0	$ 11	$ (1)