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Fair Value of Financial Instruments (Tables)
9 Months Ended
Sep. 30, 2015
Summary of Carrying Values Estimated Fair Values of Notes and Facility Financing Obligation

The following is a summary of the carrying values and estimated fair values of the 2018 notes, the facility financing obligation (i.e., the 2019 notes and Tranche B notes), and the Sanofi Loan Facility (in millions):

 

     September 30, 2015      December 31, 2014  
     Carrying
value
     Estimated
fair value
     Carrying
value
     Estimated
fair value
 

2018 notes

   $ 27.6       $ 28.4       $ —         $ —     

Facility financing obligation

   $ 74.2       $ 78.7       $ 73.0       $ 75.1   

Sanofi Loan Facility

   $ 28.9       $ 28.9       $ 3.0       $ 3.0