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Income Taxes - Summary of Open Tax Positions (Details) | 12 Months Ended
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Dec. 31, 2020
Minimum [Member] | United States Federal [Member] |  |
Income Tax Contingency [Line Items] |  |
Open Tax Years by Major Tax Jurisdiction | 2016 |
Minimum [Member] | United States State [Member] |  |
Income Tax Contingency [Line Items] |  |
Open Tax Years by Major Tax Jurisdiction | 2013 |
Minimum [Member] | GERMANY |  |
Income Tax Contingency [Line Items] |  |
Open Tax Years by Major Tax Jurisdiction | 2013 | [1]
Minimum [Member] | HONG KONG |  |
Income Tax Contingency [Line Items] |  |
Open Tax Years by Major Tax Jurisdiction | 2013 |
Minimum [Member] | ITALY |  |
Income Tax Contingency [Line Items] |  |
Open Tax Years by Major Tax Jurisdiction | 2013 | [1]
Minimum [Member] | SWEDEN |  |
Income Tax Contingency [Line Items] |  |
Open Tax Years by Major Tax Jurisdiction | 2014 |
Minimum [Member] | UNITED KINGDOM |  |
Income Tax Contingency [Line Items] |  |
Open Tax Years by Major Tax Jurisdiction | 2016 |
Maximum [Member] | United States Federal [Member] |  |
Income Tax Contingency [Line Items] |  |
Open Tax Years by Major Tax Jurisdiction | 2020 |
Maximum [Member] | United States State [Member] |  |
Income Tax Contingency [Line Items] |  |
Open Tax Years by Major Tax Jurisdiction | 2020 |
Maximum [Member] | GERMANY |  |
Income Tax Contingency [Line Items] |  |
Open Tax Years by Major Tax Jurisdiction | 2020 | [1]
Maximum [Member] | HONG KONG |  |
Income Tax Contingency [Line Items] |  |
Open Tax Years by Major Tax Jurisdiction | 2020 |
Maximum [Member] | ITALY |  |
Income Tax Contingency [Line Items] |  |
Open Tax Years by Major Tax Jurisdiction | 2020 | [1]
Maximum [Member] | SWEDEN |  |
Income Tax Contingency [Line Items] |  |
Open Tax Years by Major Tax Jurisdiction | 2020 |
Maximum [Member] | UNITED KINGDOM |  |
Income Tax Contingency [Line Items] |  |
Open Tax Years by Major Tax Jurisdiction | 2020 |
[1] | Includes federal as well as local jurisdictions.

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- Definition Tax year that remains open to examination under enacted tax laws, in CCYY format. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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