Income Taxes - Tax Credit Carryforwards (Details) $ in Millions	12 Months Ended
Dec. 31, 2020 USD ($)
Valuation allowance
Increase (decrease) in valuation allowance	$ (11.6)
Domestic \| Research and development tax credit carryforward
Tax credit carryforward
Tax credit carry forwards	28.8
State and local
Tax credit carryforward
Tax credit carry forwards	28.4
Foreign tax
Tax credit carryforward
Tax credit carry forwards	$ 9.4

The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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-Name Accounting Standards Codification
-Topic 740
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