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Income Taxes (Details) - USD ($)
$ in Millions
6 Months Ended
Aug. 01, 2015
Aug. 02, 2014
Jan. 31, 2015
Income Tax Disclosure [Abstract]      
Effective income tax rate (as a percent) 38.00% 35.10%  
Aggregate accruals for uncertain tax positions, including penalties and interest $ 14.3   $ 14.4