Leases (Narrative) (Details) ft² in Thousands, $ in Millions	3 Months Ended
	May 04, 2019 USD ($) ft² warehouse stores renewal_option
Lessee, Lease, Description [Line Items]
Number of real estate properties | stores	2
Operating lease, contract renewal option, term	5 years
Operating lease, weighted average remaining lease term	10 years 10 months 24 days
Operating lease, weighted average discount rate percentage	3.60%
Operating lease, weighted average remaining lease term, excluding ground leases	6 years 1 month 6 days
Operating lease, weighted average discount rate excluding ground leases, percentage	0.033
Cash payments made for operating leases | $	$ 148.2
Operating lease assets and liabilities, net | $	$ 207.8
Los Angeles
Lessee, Lease, Description [Line Items]
Office space leased by company, square footage | ft²	103
Boston
Lessee, Lease, Description [Line Items]
Office space leased by company, square footage | ft²	5
Minimum
Lessee, Lease, Description [Line Items]
Number of options to renew store lease for five year period | renewal_option	3
Operating lease, contract terms	3 years
Maximum
Lessee, Lease, Description [Line Items]
Number of options to renew store lease for five year period | renewal_option	4
Operating lease, contract terms	10 years
Distribution Centers and Warehouses
Lessee, Lease, Description [Line Items]
Number of warehouses leased | warehouse	5
Affiliated Entity | Distribution Centers and Warehouses
Lessee, Lease, Description [Line Items]
Number of warehouses leased | warehouse	4