Goodwill and Purchased Intangible Assets - Schedule of Intangible Assets Acquired Through Business Combinations (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Jul. 25, 2026 |
Jul. 26, 2025 |
Jul. 27, 2024 |
|
| Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] | |||
| Total intangible assets acquired | $ 190 | $ 121 | $ 11,050 |
| Customer related | |||
| Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] | |||
| Weighted- Average Useful Life (in Years) | 1 year | 3 years 6 months | |
| Finite lived intangible assets acquired | $ 5 | $ 16 | |
| Technology | |||
| Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] | |||
| Weighted- Average Useful Life (in Years) | 3 years 10 months 24 days | 3 years 9 months 18 days | |
| Finite lived intangible assets acquired | $ 185 | $ 105 | |