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EMPLOYEE RETIREMENT PLANS (Tables)
3 Months Ended
Mar. 31, 2015
EMPLOYEE RETIREMENT PLANS  
Schedule of components of net periodic benefit income

 

                                                                                                                                                                                    

 

 

Pensions
Three Months Ended
March 31,

 

OPEB Benefits
Three Months Ended
March 31,

 

(In millions)

 

2015

 

2014

 

2015

 

2014

 

Components of net periodic benefit income

   

​  

 

   

​  

 

   

​  

 

   

​  

 

   

Interest cost

 

  $

(7.7

)

  $

(7.9

)

  $

(1.1

)

  $

(1.1

)

Service cost

   

​  

(1.1

)  

​  

(0.9

)  

​  

(0.2

)  

​  

(0.2

)

Expected return on assets

 

 

11.4

 

 

11.8

 

 

-

 

 

-

 

Amortization of:

   

​  

 

   

​  

 

   

​  

 

   

​  

 

 

Prior service credit

 

 

-

 

 

-

 

 

2.3

 

 

2.3

 

Actuarial gain (loss)

   

​  

(0.7

)  

​  

0.1

   

​  

-

   

​  

-  

 

​  

​  

​  

​  

​  

​  

​  

​  

Total net periodic benefit income

 

  $

1.9

 

  $

3.1

 

  $

1.0

 

  $

1.0

 

​  

​  

​  

​  

​  

​  

​  

​  

​  

​  

​  

​  

​  

​  

​  

​