Goodwill and Purchased Intangible Assets - Schedule of Purchased Intangible Assets With Finite and Indefinite Lives (Details) - USD ($) $ in Millions	Jan. 29, 2022	Jul. 31, 2021
Purchased intangible assets with finite lives:
Gross	$ 4,669	$ 5,087
Accumulated Amortization	(2,035)	(1,973)
Total purchased intangible assets with finite lives, net	2,634	3,114
In-process research and development, with indefinite lives	445	505
Total finite and indefinite lives intangible assets, gross	5,114	5,592
Total finite and indefinite lives intangible assets, net	3,079	3,619
Technology
Purchased intangible assets with finite lives:
Gross	3,240	3,629
Accumulated Amortization	(1,369)	(1,437)
Total purchased intangible assets with finite lives, net	1,871	2,192
Customer relationships
Purchased intangible assets with finite lives:
Gross	1,359	1,387
Accumulated Amortization	(633)	(523)
Total purchased intangible assets with finite lives, net	726	864
Other
Purchased intangible assets with finite lives:
Gross	70	71
Accumulated Amortization	(33)	(13)
Total purchased intangible assets with finite lives, net	$ 37	$ 58