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Revenue - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Jul. 27, 2018 | Jul. 28, 2017
Disaggregation Of Revenue [Line Items] |  |
Revenue recognized | $ 561 | $ 528
Transaction price allocated to remaining performance obligations | $ 3,260 |
Minimum |  |
Disaggregation Of Revenue [Line Items] |  |
Deferred sales commissions amortization period | 1 year |
Maximum |  |
Disaggregation Of Revenue [Line Items] |  |
Deferred sales commissions amortization period | 3 years |

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- Definition Amount of revenue recognized that was previously reported as deferred or unearned revenue. + References No definition available. + Details
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- Definition Amount of transaction price allocated to performance obligation that has not been recognized as revenue. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130556-203045 + Details
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