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Income Taxes (Details) (Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Jun. 08, 2010	Dec. 31, 2006
Income Taxes (Textuals) [Abstract]
Effective tax rate	23.80%	25.80%	25.70%	25.70%
Notice of Assessment of corporate excise tax including penalties and interest	$ 142.4		$ 142.4		$ 103.5	$ 38.9
Amount for settlement of exchange for payment of tax			$ 7.0

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

Reflects the effects of adjustments of previously recorded tax expense, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, IRS tax settlement and unusual repatriation of foreign earnings.

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