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Revenue - Summary of Disaggregation of Revenue (Detail) - USD ($) $ in Millions | 3 Months Ended
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Jul. 26, 2019 | Jul. 27, 2018
Disaggregation Of Revenue [Line Items] |  |
Net revenues | $ 1,236 | $ 1,474
Product Revenues |  |
Disaggregation Of Revenue [Line Items] |  |
Net revenues | 644 | 875
Strategic |  |
Disaggregation Of Revenue [Line Items] |  |
Net revenues | 337 | 475
Mature |  |
Disaggregation Of Revenue [Line Items] |  |
Net revenues | 307 | 400
Software Maintenance Revenues |  |
Disaggregation Of Revenue [Line Items] |  |
Net revenues | 250 | 229
Hardware Maintenance and Other Services Revenues |  |
Disaggregation Of Revenue [Line Items] |  |
Net revenues | 342 | 370
Hardware Maintenance Support Contracts |  |
Disaggregation Of Revenue [Line Items] |  |
Net revenues | 284 | 303
Professional and Other Services |  |
Disaggregation Of Revenue [Line Items] |  |
Net revenues | $ 58 | $ 67

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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