Income Taxes Unrecognized Tax Positions (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits, Beginning Of Year	$ 103.8us-gaap_UnrecognizedTaxBenefits	$ 101.5us-gaap_UnrecognizedTaxBenefits
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions	3.5	3.3
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions	(11.1)	(7.1)
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions	10.1	12.8
Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities	(1.8)	(0.2)
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations	(3.1)	(6.5)
Unrecognized Tax Benefits, End Of Year	101.4us-gaap_UnrecognizedTaxBenefits	103.8us-gaap_UnrecognizedTaxBenefits
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	94.5	97.9
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	5.4	11.7
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	$ (4.8)	$ 0.7

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

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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

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