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Derivative Financial Instruments Nature and Amount of Collateral Received From and Posted To Our Derivative Counterparties (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Derivative |  |
Derivative Asset, Fair Value, Amount Offset Against Collateral | $ 8.0 | $ 12.0
Derivative Liability, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset | 220.8 | 200.7
Cash |  |
Derivative |  |
Cash Collateral from Counterparties | 2.5 | 3.6
Cash Collateral Posted to Counterparties | 0.0 | 4.0
Fixed Maturity Securities |  |
Derivative |  |
Fixed Maturity Securities received as Collateral | 5.5 | 8.4
FMS Collateral Posted to Counterparties | $ 220.8 | $ 196.7

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