Accrued Expenses and Other Current Liabilities - Summary of Activity in Warranty Reserve (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance at beginning of period	$ 41.9	$ 44.9	$ 19.1
Warranty obligations acquired	0.0	0.0	28.4
Warranty expense	11.5	10.8	7.4
Utilized	(13.4)	(13.8)	(10.0)
Balance at end of period	$ 40.0	$ 41.9	$ 44.9