Summary of Significant Accounting Policies - Segments and Concentration Risk (Details) - item	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Merchandise assortment by classification as a percentage of net sales
Number of reporting units	1
Accessories
Merchandise assortment by classification as a percentage of net sales
Concentration risk (as a percent)	31.00%	30.00%	29.00%
Ladies'
Merchandise assortment by classification as a percentage of net sales
Concentration risk (as a percent)	24.00%	24.00%	24.00%
Children's
Merchandise assortment by classification as a percentage of net sales
Concentration risk (as a percent)	23.00%	25.00%	26.00%
Men's
Merchandise assortment by classification as a percentage of net sales
Concentration risk (as a percent)	17.00%	17.00%	17.00%
Home
Merchandise assortment by classification as a percentage of net sales
Concentration risk (as a percent)	5.00%	4.00%	4.00%