Segment Information and Major Customers - Summary of Reportable Segments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 24, 2026	Jan. 25, 2025	Jan. 24, 2026	Jan. 25, 2025
Segment Reporting Information [Line Items]
Revenue	$ 15,349	$ 13,991	$ 30,232	$ 27,832
Gross margin	9,972	9,111	19,717	18,232
Total cost of sales	5,377	4,880	10,515	9,600
Product
Segment Reporting Information [Line Items]
Revenue	11,642	10,234	22,719	20,348
Total cost of sales	4,205	3,713	8,139	7,239
Services
Segment Reporting Information [Line Items]
Revenue	3,707	3,757	7,513	7,484
Total cost of sales	1,172	1,167	2,376	2,361
Operating segments
Segment Reporting Information [Line Items]
Gross margin	10,357	9,614	20,493	19,204
Operating segments | Americas
Segment Reporting Information [Line Items]
Revenue	8,845	8,202	17,834	16,454
Gross margin	5,816	5,545	11,817	11,285
Total cost of sales	3,029	2,512	6,016	5,170
Operating segments | Americas | Product
Segment Reporting Information [Line Items]
Total cost of sales	2,416	1,877	4,765	3,928
Operating segments | Americas | Services
Segment Reporting Information [Line Items]
Total cost of sales	612	635	1,251	1,242
Operating segments | EMEA
Segment Reporting Information [Line Items]
Revenue	4,425	3,855	8,208	7,444
Gross margin	3,173	2,750	5,895	5,272
Total cost of sales	1,252	1,066	2,314	2,172
Operating segments | EMEA | Product
Segment Reporting Information [Line Items]
Total cost of sales	962	778	1,730	1,602
Operating segments | EMEA | Services
Segment Reporting Information [Line Items]
Total cost of sales	289	288	583	570
Operating segments | APJC
Segment Reporting Information [Line Items]
Revenue	2,080	1,934	4,191	3,934
Gross margin	1,368	1,320	2,781	2,648
Total cost of sales	712	673	1,410	1,286
Operating segments | APJC | Product
Segment Reporting Information [Line Items]
Total cost of sales	533	490	1,047	926
Operating segments | APJC | Services
Segment Reporting Information [Line Items]
Total cost of sales	179	183	362	360
Unallocated corporate items
Segment Reporting Information [Line Items]
Gross margin	$ (385)	$ (503)	$ (776)	$ (972)