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Segment Information and Major Customers - Summary of Net Revenue for Groups of Similar Products and Services (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jul. 31, 2021 | Jul. 25, 2020 | Jul. 27, 2019
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenue | $ 49,818 | $ 49,301 | $ 51,904
Disposed of by sale | SPVSS Business |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenue |  |  | 168
Product |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenue | 36,014 | 35,978 | 39,005
Infrastructure Platforms |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenue | 27,109 | 27,219 | 30,184
Applications |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenue | 5,504 | 5,568 | 5,803
Security |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenue | 3,382 | 3,158 | 2,822
Other Products |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenue | 19 | 33 | 196
Service |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Total revenue | $ 13,804 | $ 13,323 | $ 12,899

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