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Investments - Amortized Cost and Fair Value of Fixed Maturity Securities by Contractual Maturity (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Amortized cost |  |
Due in one year or less | $ 9.4 | $ 7.3
Due after one year through five years | 24.3 | 30.2
Due after five years | 1.0 | 1.0
Amortized Cost, Total | 34.7 | 38.5
Fair value |  |
Due in one year or less | 9.4 | 7.3
Due after one year through five years | 22.7 | 30.0
Due after five years | 0.9 | 1.0
Fair Value, Total | $ 33.0 | $ 38.3

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