Leases Minimum lease liability ASC 842 (Details) - USD ($) $ in Millions	Feb. 01, 2020	Feb. 02, 2019
Leases [Abstract]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	$ 1,185
Lessee, Operating Lease, Liability, Payments, Due Year Two	1,053
Lessee, Operating Lease, Liability, Payments, Due Year Three	952
Lessee, Operating Lease, Liability, Payments, Due Year Four	840
Lessee, Operating Lease, Liability, Payments, Due Year Five	747
Lessee, Operating Lease, Liability, Payments, Due after Year Five	3,172
Lessee, Operating Lease, Liability, Payments, Due	7,949
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(1,521)
Operating Lease, Liability	6,428
Operating Lease, Liability, Current	(920)	$ 0
Operating Lease, Liability, Noncurrent	$ 5,508	$ 0