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Income Taxes - Valuation allowance (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Valuation allowance |  |
Valuation allowance | $ 42.1 | $ 28.6
Foreign Tax Credits |  |
Valuation allowance |  |
Valuation allowance | 34.4 | 22.3
Foreign | Operating Losses |  |
Valuation allowance |  |
Valuation allowance | $ 6.7 | $ 6.3

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + 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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