Segment Geographic and Significant Customer Information - Schedule of Revenues by Geographic Region (Detail) - USD ($) $ in Millions	3 Months Ended
Jul. 29, 2016	Jul. 31, 2015
Segment Reporting Information [Line Items]
Net revenues	$ 1,294	$ 1,335
United States, Canada And Latin America (Americas)
Segment Reporting Information [Line Items]
Net revenues	736	745
Europe, Middle East And Africa (EMEA)
Segment Reporting Information [Line Items]
Net revenues	387	415
Asia Pacific (APAC)
Segment Reporting Information [Line Items]
Net revenues	$ 171	$ 175

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

Name:	us-gaap_SalesRevenueNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration