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Goodwill and Intangible Assets (Tables)
12 Months Ended
Dec. 31, 2016
Goodwill and Intangible Assets  
Schedule of changes in goodwill

                                                                                                                                                                                    

 

 

(in millions)

 

Balance at December 31, 2015

 

$

197.8 

 

Change in goodwill

 

 

 

​  

​  

Balance at December 31, 2016

 

$

197.8 

 

​  

​  

​  

​  

        

Schedule of changes in IPR&D

                                                                                                                                                                                    

 

 

(in millions)

 

Balance at December 31, 2015

 

$

486.7 

 

Change in IPR&D

 

 

 

​  

​  

Balance at December 31, 2016

 

$

486.7 

 

​  

​  

​  

​