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Discontinued Operations (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011
Operating results of discontinued operations |  |  |  |
Income tax benefit | $ (0.7) | $ 0 | $ (0.6) | $ 0
Federal Signal Technologies [Member] |  |  |  |
Operating results of discontinued operations |  |  |  |
Net sales | 33.6 | 28.9 | 62.1 | 52.2
Interest allocated to discontinued operations | 2.2 |  | 3.1 |
Other cost and expenses | 35.4 | 30.5 | 66.8 | 57.3
Loss before income taxes | (4.0) | (1.6) | (7.8) | (5.1)
Income tax benefit | (0.7) |  | (0.6) |
Loss from discontinued operations | (3.3) | (1.6) | (7.2) | (5.1)
China WOFE [Member] |  |  |  |
Operating results of discontinued operations |  |  |  |
Net sales |  |  |  | 0.2
Cost and expenses |  |  |  | (0.5)
Loss before income taxes |  |  |  | (0.3)
Income tax benefit |  |  |  |
Loss from discontinued operations |  |  |  | $ (0.3)

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