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v3.20.4

Schedule of Reconciliation of Effective Tax Rate (Detail) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income Tax Disclosure [Line Items] |  |  |
U.S. statutory federal tax rate | 21.00% | 21.00% | 21.00%
State income taxes, net of federal tax benefit | 0.30% | 0.50% | 0.10%
U.S. global intangible low-taxed income | 5.70% | 6.20% | 0.30%
Foreign taxes | (5.60%) | (4.00%) | (2.00%)
Foreign tax credits | (4.80%) | (5.90%) | (2.20%)
U.S. foreign derived intangible income | (2.20%) | (2.60%) | (1.80%)
U.S. research and development credit | (1.30%) | (1.80%) | (2.20%)
Equity compensation | (0.60%) | (0.70%) | (1.20%)
Uncertain tax positions | (0.10%) | (4.30%) | 1.00%
U.S. transition tax |  | 1.90% | (10.50%)
Impact of rate change on deferred taxes |  |  | 0.30%
Other, net | 0.60% | 0.80% | 0.60%
Effective tax rate, Total | 13.00% | 11.10% | 3.40%

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