Segment Information and Major Customers - Summary of Reportable Segments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 25, 2026	Apr. 26, 2025	Apr. 25, 2026	Apr. 26, 2025
Segment Reporting Information [Line Items]
Revenue	$ 15,841	$ 14,149	$ 46,073	$ 41,981
Gross margin	10,080	9,278	29,797	27,510
Total cost of sales	5,761	4,871	16,276	14,471
Product
Segment Reporting Information [Line Items]
Revenue	12,117	10,374	34,836	30,722
Total cost of sales	4,613	3,688	12,752	10,927
Services
Segment Reporting Information [Line Items]
Revenue	3,724	3,775	11,237	11,259
Total cost of sales	1,148	1,183	3,524	3,544
Operating segments
Segment Reporting Information [Line Items]
Gross margin	10,458	9,703	30,951	28,907
Operating segments \| Americas
Segment Reporting Information [Line Items]
Revenue	9,569	8,380	27,403	24,834
Gross margin	6,100	5,676	17,917	16,960
Total cost of sales	3,470	2,703	9,486	7,873
Operating segments \| Americas \| Product
Segment Reporting Information [Line Items]
Total cost of sales	2,864	2,091	7,629	6,019
Operating segments \| Americas \| Services
Segment Reporting Information [Line Items]
Total cost of sales	606	612	1,857	1,854
Operating segments \| EMEA
Segment Reporting Information [Line Items]
Revenue	4,054	3,736	12,262	11,179
Gross margin	2,892	2,659	8,787	7,931
Total cost of sales	1,162	1,076	3,476	3,247
Operating segments \| EMEA \| Product
Segment Reporting Information [Line Items]
Total cost of sales	881	790	2,611	2,392
Operating segments \| EMEA \| Services
Segment Reporting Information [Line Items]
Total cost of sales	281	286	865	855
Operating segments \| APJC
Segment Reporting Information [Line Items]
Revenue	2,218	2,034	6,409	5,968
Gross margin	1,466	1,367	4,247	4,016
Total cost of sales	752	667	2,161	1,953
Operating segments \| APJC \| Product
Segment Reporting Information [Line Items]
Total cost of sales	582	481	1,629	1,407
Operating segments \| APJC \| Services
Segment Reporting Information [Line Items]
Total cost of sales	170	186	532	546
Unallocated corporate items
Segment Reporting Information [Line Items]
Gross margin	$ (378)	$ (425)	$ (1,154)	$ (1,397)