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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
--- | ---
Oct. 29, 2022 | Oct. 30, 2021
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Revenue | $ 13,632 | $ 12,900
Total Product |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Revenue | 10,245 | 9,529
Secure, Agile Networks |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Revenue | 6,684 | 5,968
Internet for the Future |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Revenue | 1,310 | 1,373
Collaboration |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Revenue | 1,086 | 1,109
End-to-End Security |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Revenue | 971 | 895
Optimized Application Experiences |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Revenue | 193 | 181
Other Products |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Revenue | 2 | 3
Services |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Revenue | $ 3,387 | $ 3,371

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