Leases (Lease Cost) (Details) - USD ($) $ in Millions	3 Months Ended
	May 01, 2020	May 03, 2019
Leases [Abstract]
Operating lease expense	$ 46	$ 40
Finance lease expense:
Amortization of ROU assets	2	0
Total finance lease expense	2	0
Short-term lease expense	1	1
Variable lease expense	8	7
Total lease expense	$ 57	$ 48