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Income Taxes Income Taxes (Unrecognized Tax Benefits) (Details) (USD $) In Millions, unless otherwise specified | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2014 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Tax Disclosure [Abstract] |  |  |  |
Liability for Uncertain Tax Positions, Noncurrent | $ 1.3 us-gaap_LiabilityForUncertainTaxPositionsNoncurrent | $ 1.3 us-gaap_LiabilityForUncertainTaxPositionsNoncurrent | $ 2.3 us-gaap_LiabilityForUncertainTaxPositionsNoncurrent | $ 3.0 us-gaap_LiabilityForUncertainTaxPositionsNoncurrent
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions | $ (1.0)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions | $ (0.7)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions |  |

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- Definition The noncurrent portion of the amount recognized for uncertain tax positions as of the balance sheet date. + 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 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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