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Income Taxes - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Effective Income Tax Rate Reconciliation, Percent | 12.00% | 55.00% | 59.00%
Undistributed Earnings of Foreign Subsidiaries and Foreign Corporate Joint Ventures [Member] |  |  |
Undistributed earnings of foreign subsidiaries | $ 5.1 | $ 5.2 |
Tax Cuts and Jobs Act [Member] |  |  |
Tax adjustments, settlements, and unusual provisions | $ 30.4 |  |

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