Goodwill and Intangibles - Composition of Finite-Lived Intangibles (Details) - USD ($) $ in Millions	Feb. 03, 2018	Jan. 28, 2017
Intangible assets, net:
Gross carrying amount	$ 49.8	$ 49.0
Accumulated amortization	(46.7)	(36.8)
Net carrying amount	3.1	12.2
Intangible assets, gross	528.2	453.8
Total intangible assets, net	481.5	417.0
Definite-lived intangible liabilities:
Gross carrying amount	(114.5)	(113.9)
Accumulated amortization	85.2	71.7
Total	(29.3)	(42.2)
Trade names
Intangible assets, net:
Indefinite-lived intangible assets	$ 478.4	$ 404.8