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Goodwill and Purchased Intangible Assets - Schedule of Intangible Assets Acquired Through Business Combinations (Details) - USD ($) $ in Millions | 12 Months Ended |
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Jul. 26, 2025 | Jul. 27, 2024 | Jul. 29, 2023
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Total intangible assets acquired | $ 121 | $ 11,050 |
Splunk |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Total intangible assets acquired |  | 10,550 |
Acquisitions |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Total intangible assets acquired | 121 | 500 | $ 150
IPR&D |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Indefinite-lived intangible assets acquired | $ 0 | 14 |
IPR&D | Splunk |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Indefinite-lived intangible assets acquired |  | 0 |
IPR&D | Acquisitions |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Indefinite-lived intangible assets acquired |  | 14 |
Customer related |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Weighted- Average Useful Life (in Years) | 3 years 6 months |  |
Finite lived intangible assets acquired | $ 16 | $ 6,223 |
Customer related | Splunk |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Weighted- Average Useful Life (in Years) |  | 9 years 1 month 6 days |
Finite lived intangible assets acquired |  | $ 6,140 |
Customer related | Acquisitions |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Weighted- Average Useful Life (in Years) |  | 4 years 10 months 24 days |
Finite lived intangible assets acquired |  | $ 83 |
Technology |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Weighted- Average Useful Life (in Years) | 3 years 9 months 18 days |  |
Finite lived intangible assets acquired | $ 105 | $ 4,300 |
Technology | Splunk |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Weighted- Average Useful Life (in Years) |  | 6 years |
Finite lived intangible assets acquired |  | $ 3,900 |
Technology | Acquisitions |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Weighted- Average Useful Life (in Years) |  | 4 years 9 months 18 days |
Finite lived intangible assets acquired |  | $ 400 |
Trade name |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Finite lived intangible assets acquired | $ 0 | $ 513 |
Trade name | Splunk |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Weighted- Average Useful Life (in Years) |  | 12 years |
Finite lived intangible assets acquired |  | $ 510 |
Trade name | Acquisitions |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Weighted- Average Useful Life (in Years) |  | 1 year 3 months 18 days |
Finite lived intangible assets acquired |  | $ 3 |

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