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Income Taxes - Reconciliation of Income Tax Rate (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Amount |  |  |
Tax provision at U.S. statutory rate | $ 24.5 | $ 35.6 | $ 32.6
Foreign income tax rate differential | 1.0 | 0.7 | (9.0)
State income tax, net of federal benefit | 1.7 | 2.7 | (2.5)
Domestic production deduction | 0.0 | (2.4) | (0.9)
Remeasurement of deferred taxes for tax law change | (1.8) | (11.8) | (7.0)
Adjustments to valuation allowances | (2.5) | (2.8) | 3.5
U.S. tax reform transition tax | (11.6) | 51.4 | 0.0
Other, net | (0.6) | (3.8) | (1.3)
Provision for income taxes | $ 10.7 | $ 69.6 | $ 15.4
Percent |  |  |
Tax provision at U.S. statutory rate | 21.00% | 35.00% | 35.00%
Foreign income tax rate differential | 0.90% | 0.70% | (9.60%)
State income tax, net of federal benefit | 1.50% | 2.60% | (2.70%)
Domestic production deduction | (0.00%) | (2.30%) | (1.00%)
Remeasurement of deferred taxes for tax law change | (1.50%) | (11.70%) | (7.50%)
Adjustments to valuation allowances | (2.10%) | (2.80%) | 3.70%
U.S. tax reform transition tax | (10.00%) | 50.60% | 0.00%
Other, net | (0.60%) | (3.50%) | (1.40%)
Provision for income taxes | 9.20% | 68.60% | 16.50%

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