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Acquisitions - Acquisition of ACAM2000 Business (Details) - USD ($) $ in Millions	Oct. 06, 2017	Dec. 31, 2019	Dec. 31, 2018
Fair value of tangible assets acquired:
Goodwill		$ 266.6	$ 259.7
ACAM2000
Business Combination, Consideration Transferred [Abstract]
Amount of cash paid	$ 117.5
Fair value of contingent purchase consideration	2.2
Total purchase price	119.7
Fair value of tangible assets acquired:
Inventory	74.9
Property, plant and equipment	20.0
Total fair value of tangible assets acquired and liabilities assumed	94.9
Acquired intangible assets	16.7
Goodwill	8.1
Total purchase price	$ 119.7