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Income Taxes Income Taxes - Operating Loss Carryforwards (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Operating Loss Carryforwards [Line Items] |  |
Net operating loss and capital loss carryforwards | $ 71.5 | $ 81.8
State Operating Loss Carryforwards | 817.8 |
Deferred tax liability, unremitted foreign earnings | 38.5 |
Undistributed Earnings of Foreign Subsidiaries | 3,900.0 |
U.S. Federal |  |
Operating Loss Carryforwards [Line Items] |  |
Foreign tax credit carryforwards | 139.5 |
Non-U.S. Tax Jurisdiction |  |
Operating Loss Carryforwards [Line Items] |  |
Operating Loss Carryforwards | 134.7 |
Operating Loss Carryforwards subject to expiration | 96.6 |
Operating Loss Carryforwards not subject to expiration | 38.1 |
Operating Loss Carryforwards valuation allowance | 72.9 |
Net operating loss and capital loss carryforwards | 134.7 |
Non-U.S. income tax holidays | 25.5 | $ 21.2
State and Local Jurisdiction |  |
Operating Loss Carryforwards [Line Items] |  |
Operating Loss Carryforwards valuation allowance | 632.3 |
Deferred Tax Assets, Tax Credit Carryforwards, Other | 14.8 |
Tax Credit Carryforward, Valuation Allowance | 14.8 |
Remy International Inc. [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Operating Loss Carryforwards | 68.4 |
Foreign tax credit carryforwards | 93.6 |
Research and development credit | 6.9 |
Tax Credit Carryforward, Amount | 47.0 |
Net U.S. Cash Tax Liability | $ 8.4 |

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