Segment Information (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) segment	Sep. 30, 2020 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment			2
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	$ 706.5	$ 548.0	$ 2,100.8	$ 1,566.7
Operating profit	181.4	99.2	568.3	290.8
Stock-based compensation expense			(27.5)	(27.6)
Other expense, net	0.3	1.5	1.3	4.6
Income before income taxes	181.1	97.7	567.0	286.2
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit	212.3	126.3	646.2	365.0
Intersegment sales elimination
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	(0.2)	(0.1)	(0.4)	(0.3)
Corporate and Unallocated
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit	(30.9)	(27.1)	(77.9)	(74.2)
Stock-based compensation expense	(11.4)	(10.0)	(27.5)	(27.6)
Corporate general costs	(18.1)	(12.4)	(45.5)	(39.5)
Restructuring and severance related charges	(0.3)	(4.5)	(2.5)	(6.7)
Amortization of Acquisition-related Intangible Assets	(0.2)	(0.2)	(0.6)	(0.4)
Cost investment activity	(0.9)	0.0	(1.8)	0.0
Proprietary Products | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	577.0	421.5	1,708.0	1,194.5
Operating profit	195.5	107.5	594.3	312.9
Contract-Manufactured Products | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	129.7	126.6	393.2	372.5
Operating profit	$ 16.8	$ 18.8	$ 51.9	$ 52.1