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Discontinued Operations - Operating Results of Discontinued Operations (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Income tax benefit |  | $ 0.1 | $ (0.8) | $ 3.4
Fire Rescue |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Income tax benefit |  |  |  | 4.6
Fire Rescue | Discontinued Operations, Held-for-sale |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Net sales | [1] |  |  | 4.2
Cost of sales | [1] |  |  | 3.9
Gross profit | [1] |  |  | 0.3
Selling, engineering, general and administrative expenses | [1] |  |  | 1.1
Operating loss | [1] |  |  | (0.8)
Other income, net | [1] |  |  | 0.0
Loss before income taxes | [1] |  |  | (0.8)
Income tax benefit | [1] |  |  | (0.2)
Net loss from operations | [1] |  |  | $ (0.6)
[1] | Only includes activity in the period up to the completion of the sale on January 29, 2016.

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