Leases (Lease Assets and Liabilities) (Details) - USD ($) $ in Millions	Oct. 30, 2020	Jan. 31, 2020
Operating Leases
ROU assets, non-current	$ 1,026	$ 886
Lease liabilities, current	109	109
Lease liabilities, non-current	904	746
Total lease liabilities	1,013	855
Finance Leases
ROU assets, non-current	54	58
Lease liabilities, current	5	4
Lease liabilities, non-current	50	55
Total lease liabilities	$ 55	$ 59