Commitments and Contingencies (Collaborative Arrangements) (Details) - Out-licensing Arrangement - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Out-licensing arrangements
Milestone payments received	$ 12.6	$ 1.0
Other Revenues
Out-licensing arrangements
Milestone revenues recognized	1.5	3.6
Product Sales
Out-licensing arrangements
Milestone revenues recognized	37.2	$ 39.8
Development Milestone
Out-licensing arrangements
Maximum milestone payment receivable	39.0
Sales Milestone
Out-licensing arrangements
Maximum milestone payment receivable	$ 46.0