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Property and Equipment (Tables)
12 Months Ended
Mar. 31, 2012
Property and Equipment [Abstract]  
Property and equipment
                 
    March 31,  
    2012     2011  
    (In millions)  

Computers, software, furniture and equipment

  $ 513.6     $ 498.8  

Leasehold improvements

    46.7       49.4  

Projects in progress

    11.5       5.7  
   

 

 

   

 

 

 
      571.8       553.9  

Less accumulated depreciation and amortization

    (484.0     (459.7
   

 

 

   

 

 

 

Property and equipment, net

  $ 87.8     $ 94.2