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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]  
Future Commitments under Non-Cancelable Operating Leases

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

 

(in millions)

      

2017

   $ 4.5   

2018

     3.6   

2019

     2.2   

2020

     1.5   

2021

     1.0   

Thereafter

     4.5   
  

 

 

 
   $ 17.3