Segment Information - Sales and Long-lived Assets by Geographic Location (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Proprietary Products	$ 2,146.9	$ 1,839.9	$ 1,717.4
Long-Lived Assets	1,011.5	909.4
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Proprietary Products	975.6	814.7	766.1
Long-Lived Assets	407.8	364.7
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Proprietary Products	282.1	236.3	235.9
Long-Lived Assets	112.0	105.5
Ireland
Revenues from External Customers and Long-Lived Assets [Line Items]
Proprietary Products	226.0	173.8	138.1
Long-Lived Assets	197.6	176.6
France
Revenues from External Customers and Long-Lived Assets [Line Items]
Proprietary Products	172.7	150.6	145.0
Long-Lived Assets	76.0	53.8
Other European countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Proprietary Products	236.8	251.1	230.5
Long-Lived Assets	66.8	59.7
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Proprietary Products	253.7	213.4	$ 201.8
Long-Lived Assets	$ 151.3	$ 149.1