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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, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income Tax Disclosure [Abstract] |  |  |
U.S federal statutory income tax rate | 21.00% | 21.00% | 21.00%
Change in valuation allowance, exclusive of state | (1.30%) | 1.80% | (1.10%)
State taxes, net of federal taxes, exclusive of tax reform | 0.20% | (13.60%) | 0.10%
Non-U.S. earnings taxed at different rates | 1.40% | 3.00% | 0.30%
GILTI | (0.10%) | 0.00% | 0.00%
Goodwill impairment | (12.70%) | 0.00% | (17.70%)
Nondeductible asset loss | 0.00% | (2.20%) | (0.20%)
Research and development tax credit | 0.40% | 2.20% | 0.30%
Change in uncertain tax positions | 2.20% | 4.30% | 0.50%
Impact of tax reform: |  |  |
Toll charge, net of foreign tax credit | 0.00% | 0.00% | 0.70%
Remeasurement of deferred taxes pursuant to tax reform | 0.00% | 0.00% | (1.20%)
Impact of 2019 Treasury regulations | 0.00% | (18.40%) | 0.00%
CARES Act | 2.70% | 0.00% | 0.00%
Divestiture of business segment, exclusive of tax reform | 0.00% | 0.00% | (1.10%)
Return to provision | (0.50%) | (0.20%) | (1.00%)
Taxes on unremitted foreign earnings | (3.90%) | (2.20%) | 0.00%
Restructuring gain | (2.60%) | 0.00% | 0.00%
Other adjustments, net | (0.90%) | 3.30% | 0.10%
Effective tax rate | 5.90% | (1.00%) | 0.70%

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