Commitments and Contingencies (Details) - USD ($) $ in Millions		6 Months Ended	12 Months Ended
	Sep. 01, 2016	Jul. 29, 2016	Jan. 30, 2015	Jan. 31, 2014	Jan. 28, 2011
Tax Years 2005 - 2006
Gain Contingencies [Line Items]
Recovery of excessive taxes and interest					$ 1.6
Tax Years 2007, 2009 and 2010
Gain Contingencies [Line Items]
Recovery of excessive taxes and interest				$ 1.6
Tax Year 2008
Gain Contingencies [Line Items]
Recovery of excessive taxes and interest			$ 0.9
Tax Years 2011 and 2012 [Member]
Gain Contingencies [Line Items]
Recovery of excessive taxes and interest		$ 1.3
Subsequent event
Gain Contingencies [Line Items]
Recovery of excessive taxes and interest	$ 5.3
Subsequent event | Minimum | Reduction in taxes | Tax Years 2007 - 2012
Gain Contingencies [Line Items]
Potential aggregate recovery (maximum)	1.8
Subsequent event | Maximum | Reduction in taxes | Tax Years 2007 - 2012
Gain Contingencies [Line Items]
Potential aggregate recovery (maximum)	$ 3.0