Segment Geographic and Significant Customer Information - Schedule of Revenues by Geographic Region (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jan. 29, 2016	Jan. 23, 2015	Jan. 29, 2016	Jan. 23, 2015
Segment Reporting Information [Line Items]
Net revenues	$ 1,386	$ 1,551	$ 4,166	$ 4,583
United States, Canada And Latin America (Americas)
Segment Reporting Information [Line Items]
Net revenues	752	837	2,316	2,574
Europe, Middle East And Africa (EMEA)
Segment Reporting Information [Line Items]
Net revenues	456	509	1,301	1,392
Asia Pacific (APAC)
Segment Reporting Information [Line Items]
Net revenues	$ 178	$ 205	$ 549	$ 617