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Contingencies (Details) (Pending Litigation [Member])
 3 Months Ended
May 02, 2015
Pending Litigation [Member]
  
Loss Contingencies [Line Items]  
Number of Shareholder Derivative Lawsuits 3big_NumberofShareholderDerivativeLawsuits
/ us-gaap_LitigationStatusAxis
= us-gaap_PendingLitigationMember