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Segment Information and Major Customers - Summary of Net Revenue for Groups of Similar Products and Services (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 27, 2019 | Apr. 27, 2019 | Jan. 26, 2019 | Oct. 27, 2018 | Jul. 28, 2018 | Apr. 28, 2018 | Jan. 27, 2018 | Oct. 28, 2017 | Jul. 27, 2019 | Jul. 28, 2018 | Jul. 29, 2017
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue | $ 13,428 | $ 12,958 | $ 12,446 | $ 13,072 | $ 12,844 | $ 12,463 | $ 11,887 | $ 12,136 | $ 51,904 | $ 49,330 | $ 48,005
Infrastructure Platforms |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 30,191 | 28,322 | 27,817
Applications |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 5,803 | 5,036 | 4,568
Security |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 2,730 | 2,352 | 2,152
Other Products |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 281 | 999 | 1,168
Product |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 39,005 | 36,709 | 35,705
Service |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 12,899 | 12,621 | $ 12,300
SPVSS Business |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | $ 168 | $ 903 |

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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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