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Segment Information - Summary of Net Sales, Operating Income (Loss), and Total Assets by Segment (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Segment Reporting Information [Line Items]          
Total net sales $ 346.4 $ 298.3 $ 1,043.3 $ 911.8  
Total operating income 39.5 34.3 114.2 100.6  
Interest expense 2.7 1.1 5.9 3.3  
Other expense (income), net 0.1 (0.3) (0.6) (1.1)  
Income before income taxes 36.7 33.5 108.9 98.4  
Total assets 1,465.1   1,465.1   $ 1,366.1
Environmental Solutions          
Segment Reporting Information [Line Items]          
Total net sales 284.8 249.1 865.3 758.5  
Total operating income 33.9 30.8 99.8 96.4  
Environmental Solutions | Continuing Operations          
Segment Reporting Information [Line Items]          
Total assets 1,163.3   1,163.3   1,098.2
Safety and Security Systems          
Segment Reporting Information [Line Items]          
Total net sales 61.6 49.2 178.0 153.3  
Total operating income 10.5 7.6 28.7 22.6  
Safety and Security Systems | Continuing Operations          
Segment Reporting Information [Line Items]          
Total assets 264.7   264.7   226.9
Corporate And Eliminations          
Segment Reporting Information [Line Items]          
Total operating income (4.9) $ (4.1) (14.3) $ (18.4)  
Corporate And Eliminations | Continuing Operations          
Segment Reporting Information [Line Items]          
Total assets $ 37.1   $ 37.1   $ 41.0