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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 |  |  |  |

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