Goodwill (Tables)

9 Months Ended

Sep. 30, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill by Reporting Segment

The changes in the carrying amount of goodwill and accumulated impairment losses by reporting segment during the nine months ended September 30, 2025 and the year ended December 31, 2024 are as follows:

(in millions)	Infrastructure Solutions		Materials Solutions		Total
Balance, December 31, 2023:
Goodwill	$	48.0	$	32.3	$	80.3
Accumulated impairment losses	(21.8)		(12.2)		(34.0)
Net	$	26.2	$	20.1	$	46.3
2024 Activity:
Foreign currency translation	$	(1.2)	$	0.1	$	(1.1)
Impairment	—		(20.2)		(20.2)
Total 2024 activity	$	(1.2)	$	(20.1)	$	(21.3)
Balance, December 31, 2024:
Goodwill	$	46.8	$	32.2	$	79.0
Accumulated impairment	(21.8)		(32.2)		(54.0)
Net	$	25.0	$	—	$	25.0
2025 Activity:
Foreign currency translation	$	0.6	$	(0.3)	$	0.3
Acquisitions	—		85.1		85.1
Total 2025 activity	$	0.6	$	84.8	$	85.4
Balance, September 30, 2025:
Goodwill	$	47.4	$	117.0	$	164.4
Accumulated impairment	(21.8)		(32.2)		(54.0)
Net	$	25.6	$	84.8	$	110.4