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Segment Information (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011 | Dec. 31, 2011
Company's net sales, operating income (loss), and total assets by segment |  |  |  |  |
Net sales | $ 185.0 | $ 167.8 | $ 585.5 | $ 493.7 |
Operating income (loss) | 12.4 | 8.5 | 38.5 | 21.7 |
Total assets | 607.2 |  | 607.2 |  | 706.7
Safety and Security Systems [Member] |  |  |  |  |
Company's net sales, operating income (loss), and total assets by segment |  |  |  |  |
Net sales | 57.8 | 52.0 | 173.2 | 161.0 |
Operating income (loss) | 7.8 | 4.4 | 18.7 | 15.9 |
Total assets | 205.8 |  | 205.8 |  | 200.3
Fire Rescue [Member] |  |  |  |  |
Company's net sales, operating income (loss), and total assets by segment |  |  |  |  |
Net sales | 25.6 | 22.2 | 90.7 | 68.1 |
Operating income (loss) | 1.9 | 0.2 | 4.4 | 1.7 |
Total assets | 111.7 |  | 111.7 |  | 117.3
Environmental Solutions [Member] |  |  |  |  |
Company's net sales, operating income (loss), and total assets by segment |  |  |  |  |
Net sales | 101.6 | 93.6 | 321.6 | 264.6 |
Operating income (loss) | 9.3 | 7.7 | 33.8 | 17.8 |
Total assets | 251.9 |  | 251.9 |  | 231.7
Corporate and Eliminations [Member] |  |  |  |  |
Company's net sales, operating income (loss), and total assets by segment |  |  |  |  |
Net sales |  |  |  |  |
Operating income (loss) | (6.6) | (3.8) | (18.4) | (13.7) |
Total assets | 34.9 |  | 34.9 |  | 22.6
Discontinued Operations [Member] |  |  |  |  |
Company's net sales, operating income (loss), and total assets by segment |  |  |  |  |
Total assets | $ 2.9 |  | $ 2.9 |  | $ 134.8

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- Definition Amount of total revenue for the reportable segments, including revenue from external customers, transactions with other operating segments of the same entity, and (gross) interest revenue. All considered to be "operating revenue" for purposes of the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a),(b),(c) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph a, b, c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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