Leases additional information (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Aug. 03, 2019	Aug. 03, 2019	Feb. 02, 2019
Leases [Abstract]
Operating Leases, Income Statement, Sublease Revenue			$ 12
Latest Lease Expiration Date	2040
Operating Lease, Right-of-Use Asset	$ 290	$ 456
Minimum Lease Commitment Signed Not Yet Commenced	$ 304	$ 304
Operating Lease, Weighted Average Remaining Lease Term	8 years 7 months 6 days	8 years 7 months 6 days
Operating Lease, Weighted Average Discount Rate, Percent	4.70%	4.70%