Goodwill and Intangibles - Composition of Finite-Lived Intangibles (Details) - USD ($) $ in Millions	Jan. 28, 2017	Jan. 30, 2016
Definite-lived intangible assets:
Gross carrying amount	$ 49.0	$ 48.4
Accumulated amortization	(36.8)	(22.8)
Net carrying amount	12.2	25.6
Intangible assets, gross	453.8	450.6
Total intangible assets, net	417.0	427.8
Definite-lived intangible liabilities:
Gross carrying amount	(113.9)	(113.3)
Accumulated amortization	71.7	51.8
Total	(42.2)	(61.5)
Unfavorable leases
Definite-lived intangible liabilities:
Gross carrying amount	(48.3)	(47.7)
Accumulated amortization	38.2	23.7
Total	(10.1)	(24.0)
Unfavorable contracts
Definite-lived intangible liabilities:
Gross carrying amount	(65.6)	(65.6)
Accumulated amortization	33.5	28.1
Total	(32.1)	(37.5)
Trade names
Definite-lived intangible assets:
Gross carrying amount	1.4	1.4
Accumulated amortization	(0.8)	(0.5)
Net carrying amount	0.6	0.9
Favorable leases
Definite-lived intangible assets:
Gross carrying amount	47.6	47.0
Accumulated amortization	(36.0)	(22.3)
Net carrying amount	11.6	24.7
Trade names
Definite-lived intangible assets:
Indefinite-lived trade names	$ 404.8	$ 402.2