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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]  
Future Commitments Under Non-Cancelable Operating Leases

Future commitments under non-cancelable operating leases are as follows:

 

(in millions)

      

2015

   $ 4.1   

2016

     3.3   

2017

     2.8   

2018

     2.2   

2019

     1.2   

Thereafter

     2.5   
  

 

 

 
   $ 16.1