Leases (Lease Liability Maturity) (Details) - USD ($) $ in Millions	May 01, 2020	Jan. 31, 2020
Operating Leases
2021	$ 102
2022	148
2023	133
2024	105
2025	79
Thereafter	597
Total future minimum lease payments	1,164
Less: Imputed interest	(276)
Total lease liabilities	888	$ 855
Finance Lease, Liability, Payment, Due [Abstract]
2021	4
2022	6
2023	7
2024	7
2025	6
Thereafter	34
Total future minimum lease payments	64
Less: Imputed interest	(8)
Total lease liabilities	56	$ 59
Legally binding minimum lease payments for leases signed but not yet commenced	$ 290