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Derivative Financial Instruments Nature and Amount of Collateral Received From and Posted To Our Derivative Counterparties (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Derivative |  |
Derivative Asset, Fair Value, Amount Offset Against Collateral | $ 20.5 | $ 37.4
Derivative Liability, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset | 80.7 | 39.8
Cash |  |
Derivative |  |
Cash Collateral from Counterparties | 3.5 | 11.1
Cash Collateral Posted to Counterparties | 0.0 | 0.0
Fixed Maturity Securities |  |
Derivative |  |
Carrying Value of Fixed Maturity Securities Posted as Collateral to Counterparties | 17.0 | 26.3
FMS Collateral Posted to Counterparties | $ 80.7 | $ 39.8

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