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Operating Results of Discontinued Operations (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Income tax (benefit) expense | $ (6.3) | $ (1.5) | $ (3.4) | $ (8.3) | $ (1.0)
Net (loss) income from operations |  | $ 4.0 |  |  |
Discontinued Operation, Tax Effect of Gain (Loss) from Disposal of Discontinued Operation |  |  | 1.0 |  |
Fire Rescue [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax |  |  | 4.2 |  |
Income tax (benefit) expense |  |  | (4.6) |  |
Fire Rescue [Member] | Discontinued Operations, Held-for-sale [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Net sales |  |  | 4.2 | 100.0 | 139.4
Cost of sales |  |  | 3.9 | 80.8 | 114.8
Gross profit |  |  | 0.3 | 19.2 | 24.6
Selling, engineering, general and administrative expenses |  |  | 1.1 | 17.1 | 20.7
Restructuring |  |  | 0.0 | 0.8 | 0.0
Operating income |  |  | (0.8) | 1.3 | 3.9
Interest expense, net |  |  | 0.0 | 0.0 | 0.2
Other income, net |  |  | 0.0 | (0.2) | (0.2)
(Loss) income before income taxes |  |  | (0.8) | 1.5 | 3.9
Income tax (benefit) expense |  |  | 0.2 | (0.3) | (0.6)
Net (loss) income from operations |  |  | (0.6) | $ 1.2 | $ 3.3
Latvian Commercial Dispute [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Loss Contingency, Loss in Period |  |  | $ 1.3 |  |

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