Segment Information and Major Customers - Summary of Reportable Segments (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 25, 2026	Jul. 26, 2025	Jul. 27, 2024
Segment Reporting [Line Items]
Total revenue	$ 63,325	$ 56,654	$ 53,803
Gross margin	40,860	36,790	34,828
Total cost of sales	22,465	19,864	18,975
Product
Segment Reporting [Line Items]
Total revenue	48,295	41,608	39,253
Total cost of sales	17,781	15,121	14,339
Services
Segment Reporting [Line Items]
Total revenue	15,030	15,046	14,550
Total cost of sales	4,684	4,743	4,636
Operating Segments
Segment Reporting [Line Items]
Gross margin	42,392	38,938	36,312
Operating Segments \| Americas
Segment Reporting [Line Items]
Total revenue	37,799	33,656	31,971
Gross margin	24,625	22,962	21,372
Total cost of sales	13,174	10,694	10,600
Operating Segments \| Americas \| Product
Segment Reporting [Line Items]
Total cost of sales	10,712	8,206	8,077
Operating Segments \| Americas \| Services
Segment Reporting [Line Items]
Total cost of sales	2,463	2,487	2,523
Operating Segments \| EMEA
Segment Reporting [Line Items]
Total revenue	16,613	14,824	14,117
Gross margin	11,835	10,545	9,755
Total cost of sales	4,778	4,279	4,362
Operating Segments \| EMEA \| Product
Segment Reporting [Line Items]
Total cost of sales	3,621	3,138	3,264
Operating Segments \| EMEA \| Services
Segment Reporting [Line Items]
Total cost of sales	1,158	1,140	1,098
Operating Segments \| APJC
Segment Reporting [Line Items]
Total revenue	8,914	8,174	7,716
Gross margin	5,933	5,431	5,187
Total cost of sales	2,982	2,743	2,529
Operating Segments \| APJC \| Product
Segment Reporting [Line Items]
Total cost of sales	2,270	2,010	1,838
Operating Segments \| APJC \| Services
Segment Reporting [Line Items]
Total cost of sales	711	734	690
Unallocated corporate items
Segment Reporting [Line Items]
Gross margin	$ (1,532)	$ (2,148)	$ (1,484)