Goodwill (Tables)

12 Months Ended

Dec. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill by Reporting Segment

The changes in the carrying amount of goodwill and accumulated impairment losses by reporting segment during the years ended December 31, 2022 and 2021 are as follows:

(in millions)	Infrastructure Solutions		Materials Solutions		Corporate and Other		Total
Balance, December 31, 2020:
Goodwill	$	39.4	$	33.3	$	—	$	72.7
Accumulated impairment losses	(21.8)		(12.2)		—		(34.0)
Net	$	17.6	$	21.1	$	—	$	38.7
2021 Activity:
Foreign currency translation	$	0.1	$	(0.1)	$	—	$	—
Acquisitions	(0.1)		—		—		(0.1)
Total 2021 activity	$	—	$	(0.1)	$	—	$	(0.1)
Balance, December 31, 2021:
Goodwill	$	39.4	$	33.2	$	—	$	72.6
Accumulated impairment	(21.8)		(12.2)		—		(34.0)
Net	$	17.6	$	21.0	$	—	$	38.6
2022 Activity:
Foreign currency translation	$	(0.5)	$	(1.6)	$	(0.6)	$	(2.7)
Acquisitions	—		—		9.3		9.3
Total 2022 activity	$	(0.5)	$	(1.6)	$	8.7	$	6.6
Balance, December 31, 2022:
Goodwill	$	38.9	$	31.6	$	8.7	$	79.2
Accumulated impairment	(21.8)		(12.2)		—		(34.0)
Net	$	17.1	$	19.4	$	8.7	$	45.2