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Defined Benefit Plans (Tables)
 6 Months Ended
Jun. 30, 2015
Compensation and Retirement Disclosure [Abstract]  
Components of Net Periodic Benefit Cost for Pension and Postretirement Benefits

The components of net periodic benefit cost for pension and postretirement benefits for the six and three months ended June 30, 2015 and 2014 were as follows:

 

(In millions)    Six Months Ended June 30,  
     Pension
Benefits		      Postretirement
Benefits		  
     2015      2014      2015      2014  

Service cost

    $ 6.4       $ 5.4       $ —         $ —     

Interest cost

      16.9         16.2         0.3         0.4   

Expected return on plan assets

      (20.4 )       (21.1 )       —           —     

Recognition of prior service costs (credits)

      —           0.1         (7.0 )       (17.7 ) 

Recognition of actuarial losses

      —           —           —           0.6   
  

 

 

     

 

 

     

 

 

     

 

 

  

Net periodic benefit cost (income)

    $ 2.9       $ 0.6       $ (6.7 )     $ (16.7 ) 

 

(In millions)    Three Months Ended June 30,  
     Pension
Benefits		      Postretirement
Benefits		  
     2015      2014      2015      2014  

Service cost

    $ 3.2       $ 2.7       $ —         $ —     

Interest cost

      8.4         8.0         0.1         0.2   

Expected return on plan assets

      (10.2 )       (10.5 )       —           —     

Recognition of prior service costs (credits)

      —           0.1         (3.5 )       (7.1 ) 
  

 

 

     

 

 

     

 

 

     

 

 

  

Net periodic benefit cost (income)

    $ 1.4       $ 0.3       $ (3.4 )     $ (6.9 )