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Income Taxes Income tax rate breakdown (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2012 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Tax Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
U.S. federal |  |  |  |  |  |  |  |  | $ (5.0)us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations | $ 1.3 us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations | $ 12.6 us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations
State and local |  |  |  |  |  |  |  |  | 0.3 us-gaap_CurrentStateAndLocalTaxExpenseBenefit | 1.2 us-gaap_CurrentStateAndLocalTaxExpenseBenefit | 0.6 us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Foreign |  |  |  |  |  |  |  |  | 1.6 us-gaap_CurrentForeignTaxExpenseBenefit | 3.3 us-gaap_CurrentForeignTaxExpenseBenefit | 0.9 us-gaap_CurrentForeignTaxExpenseBenefit
Net current tax provision (benefit) |  |  |  |  |  |  |  |  | (3.1)us-gaap_CurrentIncomeTaxExpenseBenefit | 5.8 us-gaap_CurrentIncomeTaxExpenseBenefit | 14.1 us-gaap_CurrentIncomeTaxExpenseBenefit
U.S federal |  |  |  |  |  |  |  |  | (19.5)us-gaap_DeferredFederalIncomeTaxExpenseBenefit | 44.6 us-gaap_DeferredFederalIncomeTaxExpenseBenefit | (7.3)us-gaap_DeferredFederalIncomeTaxExpenseBenefit
State and local |  |  |  |  |  |  |  |  | (1.2)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit | 2.5 us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit | 0 us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Foreign |  |  |  |  |  |  |  |  | (13.3)us-gaap_DeferredForeignIncomeTaxExpenseBenefit | 13.4 us-gaap_DeferredForeignIncomeTaxExpenseBenefit | (0.3)us-gaap_DeferredForeignIncomeTaxExpenseBenefit
Net valuation allowance increase (decrease) |  |  |  |  |  |  |  |  | 9.9 us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount | (25.2)us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount | 0.5 us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Deferred income tax expense (benefit) |  |  |  |  |  |  |  |  | (24.1)us-gaap_DeferredIncomeTaxExpenseBenefit | 35.3 us-gaap_DeferredIncomeTaxExpenseBenefit | (7.1)us-gaap_DeferredIncomeTaxExpenseBenefit
Provision (benefit) for income taxes | $ (11.3)us-gaap_IncomeTaxExpenseBenefit | $ (3.6)us-gaap_IncomeTaxExpenseBenefit | $ (6.7)us-gaap_IncomeTaxExpenseBenefit | $ (5.6)us-gaap_IncomeTaxExpenseBenefit | $ (10.5)us-gaap_IncomeTaxExpenseBenefit | $ 4.4 us-gaap_IncomeTaxExpenseBenefit | $ 24.3 us-gaap_IncomeTaxExpenseBenefit | $ 22.9 us-gaap_IncomeTaxExpenseBenefit | $ (27.2)us-gaap_IncomeTaxExpenseBenefit | $ 41.1 us-gaap_IncomeTaxExpenseBenefit | $ 7.0 us-gaap_IncomeTaxExpenseBenefit

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- Definition Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I.7) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Deferred Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6510177 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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