Segment Information and Major Customers - Additional Information (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 23, 2021 USD ($)	Jan. 25, 2020 USD ($)	Jan. 23, 2021 USD ($) segment	Jan. 25, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of geographic segments | segment			3
Revenue	$ 11,960	$ 12,005	$ 23,889	$ 25,164
United States
Segment Reporting Information [Line Items]
Revenue	$ 6,200	$ 6,200	$ 12,700	$ 13,300