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Income Taxes - Effective Income Tax Reconciliation (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Reconciliation of the U.S. federal statutory tax rate to the actual tax rate is as follows: |  |  |
Statutory U.S. federal income tax rate | 21.00% | 35.00% | 35.00%
Foreign earnings at rates different than U.S. federal rate | (1.50%) | (5.70%) | (1.50%)
Valuation allowance adjustments | (16.80%) | (40.80%) | (6.50%)
Impact of U.S. Tax Reform | (3.10%) | 4.30% | 0.00%
Other | (3.50%) | 0.80% | (0.90%)
Effective income tax rate | (3.90%) | (6.40%) | 26.10%
Tax Cuts and Jobs Act of 2017, Change in tax rate, deferred tax asset, income tax expense (benefit) | $ 92.9 | $ 49.7 |

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