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Segment Information - Summary of Continuing Operations by Segment (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Segment Reporting Information [Line Items]      
Net sales $ 1,434.8 $ 1,213.2 $ 1,130.8
Operating income 160.8 130.7 131.4
Interest expense 10.3 4.5 5.7
Debt settlement charges 0.1 0.0 0.0
Debt Related Commitment Fees and Debt Issuance Costs   0.0 0.0
Pension settlement charges 0.0 10.3 0.0
Other (income) expense, net (0.5) (1.7) 1.1
Income before income taxes 150.9 117.6 124.6
Total depreciation and amortization 54.7 50.4 44.8
Total assets 1,524.3 1,366.1 1,208.8
Total capital expenditures 53.0 37.4 29.7
Continuing operations      
Segment Reporting Information [Line Items]      
Total assets 1,524.3 1,366.1 1,208.6
Discontinued operations      
Segment Reporting Information [Line Items]      
Total assets 0.0 0.0 0.2
Environmental Solutions      
Segment Reporting Information [Line Items]      
Net sales 1,190.6 1,004.0 915.8
Operating income 144.5 120.5 124.3
Total depreciation and amortization 50.3 46.7 41.3
Total assets 1,206.4 1,098.2 926.8
Total capital expenditures 19.4 34.3 24.4
Safety And Security Systems      
Segment Reporting Information [Line Items]      
Net sales 244.2 209.2 215.0
Operating income 40.8 32.7 35.5
Total depreciation and amortization 4.2 3.6 3.4
Total assets 279.3 226.9 225.5
Total capital expenditures 32.4 2.8 4.1
Corporate      
Segment Reporting Information [Line Items]      
Operating income (24.5) (22.5) (28.4)
Total depreciation and amortization 0.2 0.1 0.1
Total assets 38.6 41.0 56.3
Total capital expenditures $ 1.2 $ 0.3 $ 1.2