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Fair Value Measurements (Tables)
3 Months Ended
Mar. 31, 2012
Fair Value Measurements [Abstract]  
Financial Assets Measured At Fair Value On A Recurring Basis
Term Deposits With Various Banks Outstanding
                 
     (In Millions)  
      As of
March 31,
2012
     As of
December 31,
2011
 

Balance Sheet Item

                 

Cash & Cash Equivalents

   $ 36.3       $ 43.7   

Short Term Investments

     224.2         190.8   

Non Current Assets

     0.1         0.1   
    

 

 

    

 

 

 

Total

   $ 260.6       $ 234.6