Goodwill and Purchased Intangible Assets - Schedule of Intangible Assets Acquired Through Business Combinations (Details) - USD ($) $ in Millions		12 Months Ended
	Mar. 18, 2024	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		$ 11,050	$ 150
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		500
IPR&D
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items]
Indefinite-lived intangible assets acquired		14	$ 0
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
TECHNOLOGY
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items]
Weighted- Average Useful Life (in Years)			3 years 8 months 12 days
Finite lived intangible assets acquired		$ 4,300	$ 138
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	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
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 9 months 18 days
Finite lived intangible assets acquired		$ 6,223	$ 12
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
TRADE NAME
Schedule Of Finite Lived And Indefinite Lived Intangible Assets Acquired Through Business Combinations [Line Items]
Finite lived intangible assets acquired		$ 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	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