Acquisitions - Purchase Price Allocation (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 02, 2019	Dec. 31, 2018
Identifiable assets acquired and liabilities assumed
Goodwill	$ 2,252.7	$ 2,179.6		$ 2,182.6
Kester
Identifiable assets acquired and liabilities assumed
Accounts receivable			$ 7.6
Inventories			8.9
Other current assets			0.4
Property, plant and equipment			8.3
Identifiable intangible assets			36.2
Other assets			2.6
Current liabilities			(3.2)
Long-term liabilities			(4.5)
Total identifiable net assets			56.3
Goodwill			7.6
Total purchase price			$ 63.9