Segment Geographic and Significant Customer Information - Schedule of Revenues by Geographic Region (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 27, 2017	Oct. 28, 2016	Oct. 27, 2017	Oct. 28, 2016
Segment Reporting Information [Line Items]
Net revenues	$ 1,422	$ 1,340	$ 2,747	$ 2,634
United States, Canada And Latin America (Americas)
Segment Reporting Information [Line Items]
Net revenues	796	768	1,522	1,504
Europe, Middle East And Africa (EMEA)
Segment Reporting Information [Line Items]
Net revenues	431	396	832	783
Asia Pacific (APAC)
Segment Reporting Information [Line Items]
Net revenues	$ 195	$ 176	$ 393	$ 347