Leases - Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Oct. 31, 2020	Nov. 02, 2019
Lessee, Lease, Description [Line Items]
Lease modifications, concession amount			$ 2
Operating lease expense	$ 16		48
Variable lease cost	5		21
Total lease cost	$ 21	$ 24	$ 70	$ 74
Weighted average remaining lease term	6 years 1 month 6 days		6 years 1 month 6 days
Weighted average discount rate (as a percent)	4.30%		4.30%
Cash paid for lease liabilities			$ 41	$ 53
Maximum
Lessee, Lease, Description [Line Items]
Lease term	10 years		10 years