Goodwill (Tables)

9 Months Ended

Sep. 30, 2022

Goodwill.

Changes in Carrying Amount of Goodwill, by Segment

	Engineered		Latex		Base						Americas
	Materials		Binders		Plastics		Polystyrene		Feedstocks		Styrenics		Total
Balance at December 31, 2021	$	667.3	$	15.9	$	22.4	$	4.5	$	—	$	—	$	710.1
Acquisitions (Note 3)		—		—		22.8		—		—		—		22.8
Foreign currency impact		(31.7)		(2.3)		(6.3)		(0.7)		—		—		(41.0)
Balance at September 30, 2022	$	635.6	$	13.6	$	38.9	$	3.8	$	—	$	—	$	691.9