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Restructuring Charges and Other Unusual Items (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended 3 Months Ended 12 Months Ended
Feb. 02, 2013
Jan. 28, 2012
Jan. 29, 2011
Apr. 30, 2011
SG&A
Jan. 29, 2011
SG&A
Restructuring charges and other unusual items          
Restructuring charges         $ 3.2
Charges related to lease termination losses and vacated leased space 0 0 2.8 2.8  
Fixed asset impairment charges $ 0.3 $ 4.6 $ 0.4   $ 0.4