Leases - Summary of Future Lease Payments (Details) $ in Millions	Aug. 03, 2019 USD ($)
Leases [Abstract]
Operating Leases, 2019	$ 145
Operating Leases, 2020	309
Operating Leases, 2021	301
Operating Leases, 2022	287
Operating Leases, 2023	272
Operating Leases, After 2023	3,603
Total lease payments, Operating Leases	4,917
Amount representing interest, Operating Leases	(2,112)
Lease liabilities, Operating Leases	2,805
Finance Leases, 2019	82
Finance Leases, 2020	168
Finance Leases, 2021	148
Finance Leases, 2022	131
Finance Leases, 2023	111
Finance Leases, After 2023	1,686
Total lease payments, Finance Leases	2,326
Amount representing interest, Finance Leases	(1,490)
Lease liabilities, Finance Leases	836
2019	227
2020	477
2021	449
2022	418
2023	383
After 2023	5,289
Total lease payments	7,243
Amount representing interest	(3,602)
Lease liabilities	$ 3,641