Segment Information and Major Customers - Summary of Reportable Segments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 30, 2022	May 01, 2021	Apr. 30, 2022	May 01, 2021
Segment Reporting Information [Line Items]
Revenue	$ 12,835	$ 12,803	$ 38,455	$ 36,692
Gross margin	8,121	8,185	24,223	23,550
Operating segments
Segment Reporting Information [Line Items]
Gross margin	8,386	8,445	25,035	24,303
Operating segments | Americas
Segment Reporting Information [Line Items]
Revenue	7,638	7,262	22,344	21,430
Gross margin	4,952	4,831	14,438	14,383
Operating segments | EMEA
Segment Reporting Information [Line Items]
Revenue	3,271	3,483	10,138	9,654
Gross margin	2,154	2,283	6,664	6,322
Operating segments | APJC
Segment Reporting Information [Line Items]
Revenue	1,926	2,057	5,972	5,608
Gross margin	1,279	1,331	3,934	3,599
Unallocated corporate items
Segment Reporting Information [Line Items]
Gross margin	$ (265)	$ (260)	$ (812)	$ (753)