XML 101 R87.htm IDEA: XBRL DOCUMENT v3.3.1.900
Legal Proceedings - Loss Contingencies (Details)
$ in Millions
12 Months Ended
Feb. 01, 2014
USD ($)
Apr. 30, 2015
USD ($)
Mar. 07, 2013
USD ($)
Dec. 10, 2010
USD ($)
Claimant
Loss Contingencies [Line Items]        
Approximate claims asserted against the company's acquiring bank   $ 2.2   $ 15.6
Number of claimants | Claimant       2
Positive Outcome of Litigation        
Loss Contingencies [Line Items]        
Gain contingency     $ 13.3  
Computer Network Intrusion | Threatened Litigation        
Loss Contingencies [Line Items]        
Loss in period $ 15.4