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Share-Based Compensation (Tables)
3 Months Ended
Jun. 30, 2011
Share Based Compensation (Tables) [Abstract]  
Share-based compensation expense
                 
    Quarter Ended June 30,  
    2011     2010  
    (In millions)  
Cost of license revenue
  $ 1.1     $ 0.8  
Cost of maintenance revenue
    3.5       2.3  
Cost of professional services revenue
    1.3       0.9  
Selling and marketing expenses
    9.1       8.7  
Research and development expenses
    2.9       2.1  
General and administrative expenses
    12.9       10.3  
 
           
Total share-based compensation expense
  $ 30.8     $ 25.1