Segment Information (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jul. 31, 2016	May 01, 2016	Aug. 02, 2015	Jul. 31, 2016	Aug. 02, 2015
Segment Reporting Information [Line Items]
Net revenues related to foreign operations	$ 80.0		$ 66.9	$ 149.7	$ 121.7
Severance, related reorganization charges		$ 13.2
Long-term assets related to foreign operations	$ 60.7		$ 60.0	$ 60.7	$ 60.0