Goodwill and Purchased Intangible Assets - Schedule of Intangible Assets Acquired Through Business Combinations (Details) $ in Millions	3 Months Ended
	Oct. 24, 2020 USD ($) acquisition
Intangible Assets Acquired Through Business Combinations
Number of acquisitions | acquisition	3
Total, amount	$ 210
IPR&D
Intangible Assets Acquired Through Business Combinations
Indefinite lives, amount	$ 0
TECHNOLOGY
Intangible Assets Acquired Through Business Combinations
Weighted- Average Useful Life (in Years)	3 years 10 months 24 days
Finite lives, amount	$ 162
CUSTOMER RELATIONSHIPS
Intangible Assets Acquired Through Business Combinations
Weighted- Average Useful Life (in Years)	4 years
Finite lives, amount	$ 42
OTHER
Intangible Assets Acquired Through Business Combinations
Weighted- Average Useful Life (in Years)	2 years
Finite lives, amount	$ 6