Goodwill - Schedule of changes in the carrying amount of goodwill and accumulated impairment losses by reporting segment (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Abstract]
Goodwill		$ 79.2	$ 72.6	$ 72.7
Accumulated impairment losses		(34.0)	(34.0)	(34.0)
Net		45.2	38.6	38.7
Foreign currency translation		(2.7)	0.0
Acquisitions			(0.1)
Acquisitions		9.3
Goodwill, period increase (decrease)		6.6	(0.1)
Corporate and Other
Goodwill [Abstract]
Goodwill		8.7	0.0	0.0
Accumulated impairment losses		0.0	0.0	0.0
Net		8.7	0.0	0.0
Foreign currency translation		(0.6)	0.0
Acquisitions			0.0
Acquisitions		9.3
Goodwill, period increase (decrease)		8.7	0.0
Infrastructure Solutions
Goodwill [Abstract]
Goodwill		38.9	39.4	39.4
Accumulated impairment losses		(21.8)	(21.8)	(21.8)
Net		17.1	17.6	17.6
Foreign currency translation		(0.5)	0.1
Acquisitions			(0.1)
Acquisitions	$ 0.0
Goodwill, period increase (decrease)		(0.5)	0.0
Materials Solutions
Goodwill [Abstract]
Goodwill		31.6	33.2	33.3
Accumulated impairment losses		(12.2)	(12.2)	(12.2)
Net		19.4	21.0	$ 21.1
Foreign currency translation		(1.6)	(0.1)
Acquisitions			0.0
Acquisitions		0.0
Goodwill, period increase (decrease)		$ (1.6)	$ (0.1)