Commitments and Contingencies (Details) $ in Millions	1 Months Ended	6 Months Ended
	Jul. 31, 2012 claim	Jun. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration		$ 74.3	$ 71.6
Number of claims included in post-payment audit | claim	183
Fixed purchase provisions		19.2
Accrued Liabilities
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration		41.1	27.4
Other Noncurrent Liabilities
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration		33.2	$ 44.2
Merck [Member]
Business Acquisition, Contingent Consideration [Line Items]
Additional milestone payment		$ 25.0