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Acquisitions (Details Textual) (USD $)
In Millions, unless otherwise specified
9 Months Ended
Sep. 30, 2012
Jun. 30, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Dec. 31, 2010
Sep. 30, 2012
Stromedix, Inc. [Member]
Mar. 08, 2012
Stromedix, Inc. [Member]
Mar. 07, 2012
Stromedix, Inc. [Member]
Mar. 08, 2012
STX One Hundred [Member]
Stromedix, Inc. [Member]
Acquisitions (Textual) [Abstract]                    
Cash portion of consideration               $ 75.0    
Value of contingent consideration               487.5   275.0
Fair value of contingent consideration 290.3 280.9 151.0 125.9 84.6 81.2   122.2    
Discount rate used to calculate fair value of in process research and development               20.00%    
In process research and development 219.2             219.2   202.6
Remaining cost to complete primary indication                   290.0
Percentage of equity interest to the portion of total capital stock                 5.00%  
Recognized gain             $ 9.0