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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 Filinggroup	Jun. 30, 2011
Income Taxes (Textual) [Abstract]
Number of U.S. tax return filing groups			2
Effective income tax rates	29.20%	38.30%	29.60%	19.10%
Net deferred tax asset	$ 18.1		$ 18.1

- Definition

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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