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Income Taxes, Valuation Allowances and NOL Carryforwards (Details) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Operating Loss Carryforwards [Line Items] |  |
Operating Loss Carryforwards | $ 75.9 |
Tax Benefit of Loss Carryovers | 75.9 | $ 71.7
NOL Carryforwards which Expire | 49.5 |
NOL Carryforwards which have an Unlimited Life | 26.4 |
Valuation Allowance [Abstract] |  |
Deferred Tax Assets, Valuation Allowance | (81.4) | $ (78.1)
Foreign Jurisdictions [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Tax Benefit of Loss Carryovers | 28.0 |
Federal Jurisdiction [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Tax Benefit of Loss Carryovers | 2.1 |
State and Local Jurisdiction [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Tax Benefit of Loss Carryovers | 45.8 |
United States |  |
Valuation Allowance [Abstract] |  |
Deferred Tax Assets, Valuation Allowance | (53.7) |
Foreign Jurisdictions [Member] |  |
Valuation Allowance [Abstract] |  |
Deferred Tax Assets, Valuation Allowance | $ (27.7) |

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