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Earnings (Loss) Per Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Computation of Earnings (Loss) per Common Share
Income from continuing operations	$ 4.4	$ 3.3	$ 17.2	$ 6.6
Loss from discontinued operations and disposal, net of tax	(19.1)	(0.9)	(49.4)	(5.6)
Net (loss) income	$ (14.7)	$ 2.4	$ (32.2)	$ 1.0
Weighted average shares outstanding - basic	62.4	62.2	62.3	62.2
Dilutive effect of common stock equivalents	0.6		0.3
Weighted average shares outstanding - diluted	63.0	62.2	62.6	62.2
Basic and diluted earnings (loss) per share:
Income from continuing operations	$ 0.07	$ 0.05	$ 0.28	$ 0.11
Loss from discontinued operations and disposal, net of tax	$ (0.31)	$ (0.01)	$ (0.79)	$ (0.09)
(Loss) earnings per share	$ (0.24)	$ 0.04	$ (0.51)	$ 0.02

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Amount of gain (loss), after tax expense or benefit and not previously recognized, resulting from the sale of a business component.

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