Segment Information and Major Customers - Summary of Reportable Segments (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 30, 2022	Jul. 31, 2021	Jul. 25, 2020
Segment Reporting Information [Line Items]
Total revenue	$ 51,557	$ 49,818	$ 49,301
Gross margin	32,248	31,894	31,683
Operating Segments
Segment Reporting Information [Line Items]
Gross margin	33,326	32,914	32,538
Operating Segments | Americas
Segment Reporting Information [Line Items]
Total revenue	29,814	29,161	29,291
Gross margin	19,117	19,499	19,547
Operating Segments | EMEA
Segment Reporting Information [Line Items]
Total revenue	13,715	12,951	12,659
Gross margin	8,969	8,466	8,304
Operating Segments | APJC
Segment Reporting Information [Line Items]
Total revenue	8,027	7,706	7,352
Gross margin	5,241	4,949	4,688
Unallocated corporate items
Segment Reporting Information [Line Items]
Gross margin	$ (1,078)	$ (1,020)	$ (855)