Accrued Expenses and Other Current Liabilities - Summary of Activity in Sales Returns Reserve (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 03, 2018	Jan. 28, 2017	Jan. 30, 2016
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	$ 13.0	$ 14.0	$ 15.3
Net adjustment	0.5	(1.0)	(1.3)
Ending balance	$ 13.5	$ 13.0	$ 14.0