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Pension Plans (Tables)
 6 Months Ended
Jun. 30, 2014
Components of Net Periodic Pension Cost

The components of net periodic pension cost are as follows:

 

     Quarter Ended
June 30,		     Six Months Ended
June 30,		  
     2014     2013     2014     2013  
(dollars in millions)             

Service cost, net of employee contributions

    $ 6.8      $ 7.6      $ 13.5      $ 15.1   

Interest cost

      5.2        4.5        10.5        9.1   

Expected return on plan assets

      (6.8 )      (6.5 )      (13.6 )      (13.0 ) 

Amortization

      2.5        3.4        4.9        6.8   
  

 

 

    

 

 

    

 

 

    

 

 

  

Net periodic pension cost

    $ 7.7      $ 9.0      $ 15.3      $ 18.0