Goodwill (Tables)

6 Months Ended

Jun. 30, 2021

Goodwill.

Changes in Carrying Amount of Goodwill, by Segment

	Latex		Engineered		Base						Americas
	Binders		Materials		Plastics		Polystyrene		Feedstocks		Styrenics		Total
Balance at December 31, 2020	$	17.1	$	16.0	$	24.2	$	4.8	$	—	$	—	$	62.1
Acquisitions (Note 3)		—		567.7		—		—		—		—		567.7
Foreign currency impact		(0.6)		(4.8)		(0.8)		(0.1)		—		—		(6.3)
Balance at June 30, 2021	$	16.5	$	578.9	$	23.4	$	4.7	$	—	$	—	$	623.5