Leases - Lessor Arrangements, Future Minimum Lease Payments (Details) - USD ($) $ in Millions	Oct. 26, 2019	Jul. 27, 2019
Future Minimum Lease Payments, After Topic 842 Adoption [Abstract]
2020 (remaining nine months)	$ 595
2021	736
2022	470
2023	268
2024	120
Thereafter	29
Total	2,218
Less: Present value of lease payments	2,084
Difference between undiscounted cash flows and discounted cash flows	$ 134
Future Minimum Lease Payments, Prior to Topic 842 Adoption [Abstract]
2020		$ 1,028
2021		702
2022		399
2023		185
2024		53
Total		$ 2,367