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Schedule of Effective Tax Rate for (Loss) Income Before Income Taxes (Detail) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Schedule Of Effective Tax Rates [Line Items] |  |  |
Effective tax rates | 62.30% | 10.20% | (9.90%)
U.S. |  |  |
Schedule Of Effective Tax Rates [Line Items] |  |  |
Effective tax rates | 33.80% | 1.70% | 45.80%
Foreign |  |  |
Schedule Of Effective Tax Rates [Line Items] |  |  |
Effective tax rates | 16.70% | 13.20% | 16.40%

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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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