Goodwill and Purchased Intangible Assets - Schedule of Goodwill by Reportable Segments (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 27, 2024	Jul. 29, 2023
Goodwill [Roll Forward]
Beginning balance	$ 38,535	$ 38,304
Acquisitions		183
Foreign Currency Translation and Other	(93)	48
Ending balance	58,660	38,535
Splunk
Goodwill [Roll Forward]
Acquisitions	19,301
Acquisitions
Goodwill [Roll Forward]
Acquisitions	917
Americas
Goodwill [Roll Forward]
Beginning balance	24,035	23,882
Acquisitions		123
Foreign Currency Translation and Other	(58)	30
Ending balance	36,169	24,035
Americas | Splunk
Goodwill [Roll Forward]
Acquisitions	11,619
Americas | Acquisitions
Goodwill [Roll Forward]
Acquisitions	573
EMEA
Goodwill [Roll Forward]
Beginning balance	9,118	9,062
Acquisitions		44
Foreign Currency Translation and Other	(22)	12
Ending balance	14,283	9,118
EMEA | Splunk
Goodwill [Roll Forward]
Acquisitions	4,980
EMEA | Acquisitions
Goodwill [Roll Forward]
Acquisitions	207
APJC
Goodwill [Roll Forward]
Beginning balance	5,382	5,360
Acquisitions		16
Foreign Currency Translation and Other	(13)	6
Ending balance	8,208	$ 5,382
APJC | Splunk
Goodwill [Roll Forward]
Acquisitions	2,702
APJC | Acquisitions
Goodwill [Roll Forward]
Acquisitions	$ 137