Summary of Quarterly Results of Operations (Unaudited) - Narrative - Significant Items for Fiscal 2016 (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 29, 2017	Jan. 28, 2017	Oct. 29, 2016	Jul. 30, 2016	Apr. 30, 2016	Jan. 30, 2016	Oct. 31, 2015	Aug. 01, 2015
Hetronic Lawsuit
Segment Reporting Information [Line Items]
Legal Fees	$ 2.8	$ 1.6	$ 2.3	$ 4.3	$ 3.3	$ 2.7	$ 2.7	$ 1.2