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Defined Benefit Plans
 6 Months Ended
Jun. 30, 2015
Compensation and Retirement Disclosure [Abstract]  
Defined Benefit Plans
11. Defined Benefit Plans

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 ) 

In the first quarter of 2014, we communicated our decision to amend certain postretirement benefits to reduce health benefits for certain current and retired employees. The impact of these changes was a reduction in accrued retiree benefit plan liabilities of $14.7 million and we recorded actuarial losses of $0.6 million and prior service credits of $3.7 million in the first quarter of 2014. Liability reductions from these plan amendments are recorded as amortization of prior service cost in net income in accordance with accounting requirements. See Note 10, “Accumulated Other Comprehensive Loss,” for information on the impact on accumulated other comprehensive loss.