Acquisition - Purchase Price Allocation (Details) - USD ($) $ in Millions	Jun. 30, 2021	May 05, 2021	Dec. 31, 2020
Identifiable assets acquired and liabilities assumed
Goodwill	$ 2,267.1		$ 2,252.7
HKW
Identifiable assets acquired and liabilities assumed
Accounts receivable		$ 10.3
Inventories		13.9
Other current assets		3.0
Property, plant and equipment		6.4
Identifiable intangible assets		28.7
Other assets		2.5
Current liabilities		(21.3)
Long-term liabilities		(10.6)
Total identifiable net assets		32.9
Goodwill		18.0
Total purchase price		$ 50.9