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Retirement Plan and Other Postretirement Benefits
6 Months Ended
Jun. 30, 2011
Retirement Plan and Other Postretirement Benefits [Abstract]  
Retirement Plan and Other Postretirement Benefits
Note 13. Retirement Plan and Other Postretirement Benefits
     The Company’s liability under its ERP was $26.8 million and $27.0 million at June 30, 2011 and December 31, 2010, respectively.
     A summary of the components of net periodic benefit cost for the Company’s defined benefit pension plans and other post-retirement benefits is presented below:
                                 
    Successor     Predecessor     Successor     Predecessor  
    Retirement Benefits  
    Three Months Ended     Six Months Ended  
    June 30,     June 30,  
    2011     2010     2011     2010  
            (In millions)          
Service cost-benefits earned during the period
  $ 0.7     $ (0.1 )   $ 1.1     $ 0.8  
Interest costs on projected benefit obligations
    3.4       2.4       6.1       5.4  
Expected return on plan assets
    (2.7 )     (2.1 )     (5.3 )     (4.7 )
Recognized net actuarial loss
    (0.1 )     (0.1 )     (0.1 )     (0.2 )
 
                       
Net periodic benefit cost
  $ 1.3     $ 0.1     $ 1.8     $ 1.3  
 
                       
     Other benefits costs were $0.4 million and $0.3 million for the three months ended June 30, 2011 and June 30, 2010, respectively, and $0.9 million and $0.7 million for the six-months ended June 30, 2011 and 2010, respectively.