Segment Information - Summary of Net Sales, Operating Income (Loss), and Total Assets by Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Total net sales	$ 385.5	$ 330.2
Total operating income	39.5	28.5
Interest expense	4.7	1.3
Other expense (income), net	0.1	(0.4)
Income before income taxes	34.7	27.6
Total assets	1,584.3		$ 1,524.3
Environmental Solutions
Segment Reporting Information [Line Items]
Total net sales	318.8	274.2
Total operating income	37.6	26.8
Environmental Solutions | Continuing Operations
Segment Reporting Information [Line Items]
Total assets	1,265.5		1,206.4
Safety and Security Systems
Segment Reporting Information [Line Items]
Total net sales	66.7	56.0
Total operating income	12.1	7.9
Safety and Security Systems | Continuing Operations
Segment Reporting Information [Line Items]
Total assets	283.3		279.3
Corporate And Eliminations
Segment Reporting Information [Line Items]
Total operating income	(10.2)	$ (6.2)
Corporate And Eliminations | Continuing Operations
Segment Reporting Information [Line Items]
Total assets	$ 35.5		$ 38.6