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General (Details 8) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2012
Income Taxes
Effective income tax rates (as a percent)		22.00%	12.60%
The ownership percentage for which the entity files a consolidated federal income tax return, low end of range	80.00%	80.00%
Income tax contingency disclosures
Unrecognized tax benefits reduced due to lapse of statute of limitation	$ 27.2
Additional Paid in Capital
Income tax contingency disclosures
Unrecognized tax benefits reduced due to lapse of statute of limitation	3.9
Income Tax Expense
Income tax contingency disclosures
Unrecognized tax benefits reduced due to lapse of statute of limitation	22.7
Interest expense related to unrecognized tax benefits	$ (2.1)

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

This element represents interest expense recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity.

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