Segment Information and Major Customers - Summary of Reportable Segments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 29, 2022	Jan. 23, 2021	Jan. 29, 2022	Jan. 23, 2021
Segment Reporting Information [Line Items]
Revenue	$ 12,720	$ 11,960	$ 25,620	$ 23,889
Gross margin	8,049	7,784	16,102	15,365
Operating segments
Segment Reporting Information [Line Items]
Gross margin	8,328	8,005	16,649	15,858
Operating segments | Americas
Segment Reporting Information [Line Items]
Revenue	7,146	6,969	14,706	14,168
Gross margin	4,611	4,705	9,486	9,552
Operating segments | EMEA
Segment Reporting Information [Line Items]
Revenue	3,564	3,207	6,867	6,171
Gross margin	2,381	2,145	4,509	4,038
Operating segments | APJC
Segment Reporting Information [Line Items]
Revenue	2,010	1,784	4,046	3,551
Gross margin	1,337	1,155	2,654	2,268
Unallocated corporate items
Segment Reporting Information [Line Items]
Gross margin	$ (279)	$ (221)	$ (547)	$ (493)