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Goodwill and Purchased Intangible Assets - Schedule of Intangible Assets Acquired Through Business Combinations (Details) $ in Millions | 12 Months Ended
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Jul. 30, 2022 USD ($) acquisition | Jul. 31, 2021 USD ($) acquisition | Jul. 25, 2020 acquisition
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Number of business combinations (acquisition) | acquisition | 3 |  | 6
Total intangible assets acquired | $ 20 | $ 2,914 |
Acacia |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Total intangible assets acquired |  | $ 2,160 |
Others |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Number of business combinations (acquisition) | acquisition |  | 12 |
Total intangible assets acquired |  | $ 754 |
IPR&D |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Indefinite-lived intangible assets acquired | $ 0 | 345 |
IPR&D | Acacia |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Indefinite-lived intangible assets acquired |  | 345 |
IPR&D | Others |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Indefinite-lived intangible assets acquired |  | 0 |
TECHNOLOGY |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Weighted- Average Useful Life (in Years) | 2 years 8 months 12 days |  |
Finite lived intangible assets acquired | $ 16 | $ 1,835 |
TECHNOLOGY | Acacia |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Weighted- Average Useful Life (in Years) |  | 4 years |
Finite lived intangible assets acquired |  | $ 1,290 |
TECHNOLOGY | Others |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Weighted- Average Useful Life (in Years) |  | 4 years 3 months 18 days |
Finite lived intangible assets acquired |  | $ 545 |
CUSTOMER RELATIONSHIPS |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Weighted- Average Useful Life (in Years) | 2 years |  |
Finite lived intangible assets acquired | $ 4 | $ 664 |
CUSTOMER RELATIONSHIPS | Acacia |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Weighted- Average Useful Life (in Years) |  | 4 years |
Finite lived intangible assets acquired |  | $ 490 |
CUSTOMER RELATIONSHIPS | Others |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Weighted- Average Useful Life (in Years) |  | 4 years 7 months 6 days |
Finite lived intangible assets acquired |  | $ 174 |
OTHER |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Finite lived intangible assets acquired | $ 0 | $ 70 |
OTHER | Acacia |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Weighted- Average Useful Life (in Years) |  | 3 years 1 month 6 days |
Finite lived intangible assets acquired |  | $ 35 |
OTHER | Others |  |  |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items] |  |  |
Weighted- Average Useful Life (in Years) |  | 2 years 10 months 24 days |
Finite lived intangible assets acquired |  | $ 35 |

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