Leases - Summary of Future Financing Obligation Payments (Details) - USD ($) $ in Millions	Jul. 31, 2021	Jan. 30, 2021
Leases [Abstract]
2021	$ 34
2022	71
2023	69
2024	64
2025	55
After 2025	369
Total lease payments	662
Non-cash gain on future sale of property	219
Amount representing interest	(398)
Total financing obligations	$ 483	$ 500