Leases (Narrative) (Details) ft² in Thousands, $ in Millions	3 Months Ended	6 Months Ended
	Aug. 03, 2019 USD ($) ft² warehouse stores	Aug. 03, 2019 USD ($) ft² warehouse stores renewal_option
Lessee, Lease, Description [Line Items]
Number of real estate properties | stores	2	2
Operating lease, contract renewal option, term	5 years	5 years
Operating lease, weighted average remaining lease term	11 years	11 years
Operating lease, weighted average discount rate (percentage)	3.60%	3.60%
Operating lease, weighted average remaining lease term, excluding ground leases		6 years 2 months 12 days
Operating lease, weighted average discount rate excluding ground leases, percentage		0.033
Cash payments made for operating leases | $	$ 153.6	$ 301.8
Operating lease assets and liabilities, net | $	$ 127.6	$ 335.4
Los Angeles
Lessee, Lease, Description [Line Items]
Office space leased by company, square footage | ft²	103	103
Boston
Lessee, Lease, Description [Line Items]
Office space leased by company, square footage | ft²	5	5
Minimum
Lessee, Lease, Description [Line Items]
Operating lease, contract terms	3 years	3 years
Number of options to renew store lease for five year period | renewal_option		3
Maximum
Lessee, Lease, Description [Line Items]
Operating lease, contract terms	10 years	10 years
Number of options to renew store lease for five year period | renewal_option		4
Distribution Centers and Warehouses
Lessee, Lease, Description [Line Items]
Number of warehouses leased | warehouse	5	5
Affiliated Entity | Distribution Centers and Warehouses
Lessee, Lease, Description [Line Items]
Number of warehouses leased | warehouse	4	4