Other Income (Expense), Net (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 28, 2016	Oct. 30, 2015	Oct. 28, 2016	Oct. 30, 2015
Nonoperating Income Expense [Abstract]
Interest income	$ 10	$ 11	$ 21	$ 24
Interest expense	(12)	(12)	(27)	(23)
Other income, net	2	0	5	2
Total other income (expense), net	$ 0	$ (1)	$ (1)	$ 3