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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. 26, 2024 | Oct. 28, 2023
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Revenue | $ 13,841 | $ 14,668
Total Product |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Revenue | 10,114 | 11,139
Networking |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Revenue | 6,753 | 8,822
Security |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Revenue | 2,017 | 1,010
Collaboration |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Revenue | 1,085 | 1,117
Observability |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Revenue | 258 | 190
Services |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Revenue | $ 3,727 | $ 3,529

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