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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 | 9 Months Ended
--- | --- | ---
Apr. 27, 2024 | Apr. 29, 2023 | Apr. 27, 2024 | Apr. 29, 2023
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Revenue | $ 12,702 | $ 14,571 | $ 40,161 | $ 41,795
Total Product |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Revenue | 9,024 | 11,092 | 29,395 | 31,492
Networking |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Revenue | 6,522 | 8,982 | 22,425 | 25,105
Security |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Revenue | 1,304 | 958 | 3,288 | 2,872
Collaboration |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Revenue | 987 | 985 | 3,093 | 3,029
Observability |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Revenue | 211 | 167 | 589 | 486
Services |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Revenue | $ 3,678 | $ 3,479 | $ 10,766 | $ 10,303

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