Segment Information and Major Customers - Summary of Reportable Segments (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 27, 2024	Jul. 29, 2023	Jul. 30, 2022
Segment Reporting Information [Line Items]
Total revenue	$ 53,803	$ 56,998	$ 51,557
Gross margin	34,828	35,753	32,248
Operating Segments
Segment Reporting Information [Line Items]
Gross margin	36,312	36,788	33,326
Operating Segments | Americas
Segment Reporting Information [Line Items]
Total revenue	31,971	33,447	29,814
Gross margin	21,372	21,350	19,117
Operating Segments | EMEA
Segment Reporting Information [Line Items]
Total revenue	14,117	15,135	13,715
Gross margin	9,755	10,016	8,969
Operating Segments | APJC
Segment Reporting Information [Line Items]
Total revenue	7,716	8,417	8,027
Gross margin	5,187	5,424	5,241
Unallocated corporate items
Segment Reporting Information [Line Items]
Gross margin	$ (1,484)	$ (1,035)	$ (1,078)