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Income Taxes (Details) - USD ($) $ in Millions | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Operating Loss Carryforwards [Line Items] |  |
Valuation allowance, amount | $ 85.1 | $ 83.4
US Treasury Securities |  |
Operating Loss Carryforwards [Line Items] |  |
Debt securities | 526.1 | 354.1
Internal Revenue Service (IRS) |  |
Operating Loss Carryforwards [Line Items] |  |
Current federal income tax liability | $ 24.3 | $ 19.9

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