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Segment Information and Major Customers - Summary of Reportable Segments (Details) - USD ($) $ in Millions	3 Months Ended
	Oct. 30, 2021	Oct. 24, 2020
Segment Reporting Information [Line Items]
Revenue	$ 12,900	$ 11,929
Gross margin	8,053	7,581
Operating segments
Segment Reporting Information [Line Items]
Gross margin	8,321	7,853
Operating segments | Americas
Segment Reporting Information [Line Items]
Revenue	7,561	7,198
Gross margin	4,875	4,847
Operating segments | EMEA
Segment Reporting Information [Line Items]
Revenue	3,303	2,964
Gross margin	2,128	1,894
Operating segments | APJC
Segment Reporting Information [Line Items]
Revenue	2,036	1,767
Gross margin	1,317	1,113
Unallocated corporate items
Segment Reporting Information [Line Items]
Gross margin	$ (268)	$ (272)

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