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Acquisitions Acquisitions (Details Textual) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Feb. 28, 2015
Sep. 30, 2015
Jun. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Feb. 12, 2015
Business Acquisition [Line Items]              
Contingent consideration   $ 0.0   $ 0.0 $ 274.5 $ 0.0  
Convergence Pharmaceuticals              
Business Acquisition [Line Items]              
Cash portion of consideration $ 200.1            
Potential future milestone payments             $ 450.0
Contingent consideration $ 274.5            
Increase in the value of our estimated contingent consideration     $ 36.0        
Increase in goodwill     $ 36.0        
Discount rate 2.00%            
In-process research and development and other intangible assets             424.6
Convergence Pharmaceuticals | Raxatrigine              
Business Acquisition [Line Items]              
Potential future milestone payments             350.0
Discount rate 11.00%            
Remaining cost to complete CNV1014802             145.0
In-process research and development and other intangible assets             200.0
Convergence Pharmaceuticals | Neuropathic pain indications              
Business Acquisition [Line Items]              
Remaining cost to complete CNV1014802             415.0
In-process research and development and other intangible assets             $ 220.0