Goodwill - Schedule of Carrying Amount of Goodwill (Details) $ in Millions	9 Months Ended
	Sep. 30, 2022 USD ($)
Goodwill [Roll Forward]
Beginning Balance	$ 710.1
Acquisitions	22.8
Foreign currency impact	(41.0)
Ending Balance	691.9
Engineered Materials
Goodwill [Roll Forward]
Beginning Balance	667.3
Foreign currency impact	(31.7)
Ending Balance	635.6
Latex Binders
Goodwill [Roll Forward]
Beginning Balance	15.9
Foreign currency impact	(2.3)
Ending Balance	13.6
Base Plastics
Goodwill [Roll Forward]
Beginning Balance	22.4
Acquisitions	22.8
Foreign currency impact	(6.3)
Ending Balance	38.9
Polystyrene
Goodwill [Roll Forward]
Beginning Balance	4.5
Foreign currency impact	(0.7)
Ending Balance	$ 3.8