Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
Sep. 30, 2013
Income Taxes [Abstract]
Income Taxes Receivable	$ 19.9
Unrecognized tax benefits relating to UTPs	80.9
Unrecognized tax benefits, interest on income taxes accrued	3.5
Unrecognized tax benefits, income tax penalties accrued	9.2
Statute of limitations to expire during next twelve months	2007 through 2010
Potential change in unrecognized tax benefits during next twelve months	1.0
Unrecognized tax benefits that would reduce the income tax provision	$ 36.9

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Carrying amount as of the balance sheet date of income taxes previously overpaid to tax authorities (such as U.S. Federal, state and local tax authorities) representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes. Also called income tax refund receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.8)

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The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (d)

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This element provides a description of the nature of the event that could occur within twelve months of the reporting date that would cause a significant increase or decrease in the related unrecognized tax benefit.

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

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-Glossary Unrecognized Tax Benefit

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Amount of statutory penalties accrued for a tax position claimed or expected to be claimed by the entity, in its tax return.

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Amount of interest expense accrued for an underpayment of income taxes.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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