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Income Taxes - Reconciliation of Income Taxes Based on U.S. Federal Statutory Rate (Detail) | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Rate Rec: Percentages |  |  |
Income taxes at the federal statutory rate | 35.00% | 34.00% | 34.00%
Change in valuation allowance | (1.20%) | (6.10%) | 0.00%
Foreign tax credits, exclusive of tax reform | (13.80%) | 8.20% | 2.70%
State taxes, net of federal taxes, exclusive of tax reform | 9.10% | 5.70% | 3.60%
Non-U.S. earnings taxed at different rates | 1.70% | 4.80% | 3.20%
Non-deductible mergers and acquisitions costs | 0.00% | 0.00% | (2.60%)
R&D Tax credit | 0.30% | 0.90% | 1.30%
Change in uncertain tax positions | (0.40%) | 3.20% | 0.00%
Impact of Tax Reform |  |  |
Toll Charge, net of foreign tax credit | (11.50%) | 0.00% | 0.00%
Remeasurement of deferred taxes pursuant to tax reform | 65.60% | 0.00% | 0.00%
Tax Reform impact on divestiture of business segment | 33.90% | 0.00% | 0.00%
Section 199/Domestic Production Deduction | 0.80% | (0.00%) | (0.00%)
Divestiture of Business Segment, exclusive of tax reform | 13.60% | 0.00% | 0.00%
Prior period revisions | 0.50% | 4.20% | 1.80%
Foreign JV Net Income | 0.00% | (4.10%) | (2.30%)
Other adjustments, net | 0.70% | (0.80%) | (1.30%)
Total expense (benefit) | 134.20% | 50.00% | 40.30%

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