Segment Information and Major Customers - Summary of Reportable Segments (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 26, 2025	Jul. 27, 2024	Jul. 29, 2023
Segment Reporting Information [Line Items]
Total revenue	$ 56,654	$ 53,803	$ 56,998
Gross margin	36,790	34,828	35,753
Total cost of sales	19,864	18,975	21,245
Product
Segment Reporting Information [Line Items]
Total revenue	41,608	39,253	43,142
Total cost of sales	15,121	14,339	16,590
Services
Segment Reporting Information [Line Items]
Total revenue	15,046	14,550	13,856
Total cost of sales	4,743	4,636	4,655
Operating Segments
Segment Reporting Information [Line Items]
Gross margin	38,938	36,312	36,788
Operating Segments | Americas
Segment Reporting Information [Line Items]
Total revenue	33,656	31,971	33,447
Gross margin	22,962	21,372	21,350
Total cost of sales	10,694	10,600	12,097
Operating Segments | Americas | Product
Segment Reporting Information [Line Items]
Total cost of sales	8,206	8,077	9,479
Operating Segments | Americas | Services
Segment Reporting Information [Line Items]
Total cost of sales	2,487	2,523	2,619
Operating Segments | EMEA
Segment Reporting Information [Line Items]
Total revenue	14,824	14,117	15,135
Gross margin	10,545	9,755	10,016
Total cost of sales	4,279	4,362	5,119
Operating Segments | EMEA | Product
Segment Reporting Information [Line Items]
Total cost of sales	3,138	3,264	3,998
Operating Segments | EMEA | Services
Segment Reporting Information [Line Items]
Total cost of sales	1,140	1,098	1,121
Operating Segments | APJC
Segment Reporting Information [Line Items]
Total revenue	8,174	7,716	8,417
Gross margin	5,431	5,187	5,424
Total cost of sales	2,743	2,529	2,992
Operating Segments | APJC | Product
Segment Reporting Information [Line Items]
Total cost of sales	2,010	1,838	2,324
Operating Segments | APJC | Services
Segment Reporting Information [Line Items]
Total cost of sales	734	690	668
Unallocated corporate items
Segment Reporting Information [Line Items]
Gross margin	$ (2,148)	$ (1,484)	$ (1,035)