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Income Taxes (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	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Income tax (benefit) provision	$ (0.1)	$ 0.7	$ 0.9	$ 2.4
Effective income tax rate	0.80%	(5.90%)	(3.90%)	(13.90%)
Federal statutory income tax rate	35.00%		35.00%
Settlement of previously unrecognized Tax Benefits	0.7
Unrecognized Tax Benefits	$ 16.9		$ 16.9		$ 17.6

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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- Definition

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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- Definition

The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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