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Income Taxes, Foreign Income Tax (Details) - country | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income Tax Foreign Tax Jurisdiction [Line Items] |  |  |
U.S. federal income tax rate | 21.00% | 21.00% | 21.00%
Number of countries in which the company has operations that constitute an income tax presence | 92 |  |
Threshold for foreign taxing jurisdiction to be considered very low rate (in hundredths) | 25.00% |  |
HONG KONG [Member] |  |  |
Income Tax Foreign Tax Jurisdiction [Line Items] |  |  |
Foreign tax rate considered to be very low tax rates | 16.50% |  |
SINGAPORE [Member] |  |  |
Income Tax Foreign Tax Jurisdiction [Line Items] |  |  |
Foreign tax rate considered to be very low tax rates | 17.00% |  |
UNITED KINGDOM [Member] |  |  |
Income Tax Foreign Tax Jurisdiction [Line Items] |  |  |
Foreign tax rate considered to be very low tax rates | 19.00% |  |
SAUDI ARABIA |  |  |
Income Tax Foreign Tax Jurisdiction [Line Items] |  |  |
Foreign tax rate considered to be very low tax rates | 20.00% |  |

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- Definition The foreign entitys' statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The income tax rate threshold which is used to determine what constitutes a very low tax rate as attributable to foreign taxing entities. + References No definition available. + Details
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- Definition The number of countries in which the entity has substantial enough operations to constitute and income tax presence. + References No definition available. + Details
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 2: 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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