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Basis of Presentation (Details) (USD $)
In Millions, unless otherwise specified
6 Months Ended 12 Months Ended
Jul. 30, 2011
Feb. 02, 2013
Jan. 28, 2012
Jan. 29, 2011
Jan. 30, 2010
Basis of Presentation          
Number of weeks in fiscal year   53 52 52 52
Expiration period of unredeemed points (in months) 6        
Expiration period of unredeemed awards (in months) 2        
Cumulative adjustment to increase net revenue and to adjust the current liability balance to an amount reflecting estimated future award redemptions       $ 6.7  
Aggregate dollar value of loyalty program accruals included in accrued liabilities $ 2.4     $ 2.7  
Number of separate statements in which the entity is required to present comprehensive income 2