Commitments and Contingencies - Schedule of Total Rent Expense (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 30, 2016	Aug. 01, 2015	Jul. 30, 2016	Aug. 01, 2015
Commitments and Contingencies Disclosure [Abstract]
Real estate taxes, insurance, common area maintenance charges and other executory costs	$ 10.3	$ 9.6	$ 20.5	$ 19.0