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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
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Segment Reporting Information [Line Items] |  |
Total net sales | $ 177.8 | $ 172.8
Total operating income | 11.3 | 16.1
Interest expense | 0.6 | 0.4
Write off of Deferred Debt Issuance Cost | 0.0 | 0.3
Other income, net | (0.3) | (0.7)
Income before income taxes | 11.0 | 16.1
Corporate and Eliminations |  |
Segment Reporting Information [Line Items] |  |
Total operating income | (5.4) | (5.3)
Environmental Solutions | Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Total net sales | 127.8 | 115.4
Total operating income | 10.3 | 16.5
Safety & Security Systems | Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Total net sales | 50.0 | 57.4
Total operating income | $ 6.4 | $ 4.9

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