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Income Taxes - Carryforwards (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020
Carryforwards |  |
Valuation allowance against deferred tax assets | $ 67.0 | $ 64.2
U.K. |  |
Carryforwards |  |
Valuation allowance against deferred tax assets | 19.5 |
U.K. | Capital loss carryforwards |  |
Carryforwards |  |
Tax credit carryforwards | 4.2 |
Germany |  |
Carryforwards |  |
Net operating loss carryforwards | 45.2 |
Valuation allowance against net operating loss carryforwards | 14.7 |
New Zealand |  |
Carryforwards |  |
Net operating loss carryforwards | 0.4 |
Italy |  |
Carryforwards |  |
Net operating loss carryforwards | 0.1 |
Federal and state | U.S. |  |
Carryforwards |  |
Net operating loss carryforwards | 236.5 |
Tax credit carryforwards | 0.1 |
Net operating loss carryforwards utilized | 271.6 |
Valuation allowance against net operating loss carryforwards | 0.7 |
Foreign | U.S. |  |
Carryforwards |  |
Tax credit carryforwards | 32.0 |
Valuation allowance against tax credit carryforwards | $ 32.0 |

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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=121826272&loc=d3e32537-109319 + Details
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