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Income Taxes (Details) - USD ($)
$ in Millions
6 Months Ended
Jul. 30, 2016
Aug. 01, 2015
Jan. 30, 2016
Income Tax Disclosure [Abstract]      
Effective income tax rate (as a percent) 45.30% 38.00%  
Aggregate accruals for uncertain tax positions, including penalties and interest $ 17.4   $ 13.9