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ACCOUNTING FOR DERIVATIVES - FAIR VALUE BY BALANCE SHEET LOCATION (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Fixed indexed call options |  |
Derivatives, Fair Value [Line Items] |  |
Fixed indexed call options | $ 150.0 | $ 56.7
Not Designated as Hedging Instrument |  |
Derivatives, Fair Value [Line Items] |  |
Total assets | 129.7 | 38.9
Total liabilities | 1,213.4 | 1,297.0
Not Designated as Hedging Instrument | Fixed indexed call options | Other invested assets |  |
Derivatives, Fair Value [Line Items] |  |
Fixed indexed call options | 150.0 | 56.7
Not Designated as Hedging Instrument | Reinsurance receivables | Reinsurance receivables |  |
Derivatives, Fair Value [Line Items] |  |
Reinsurance receivables | (20.3) | (17.8)
Not Designated as Hedging Instrument | Embedded derivatives related to fixed indexed annuities at fair value | Policyholder account balances |  |
Derivatives, Fair Value [Line Items] |  |
Total liabilities | 1,676.1 | 1,788.4
Not Designated as Hedging Instrument | Embedded derivatives related to fixed indexed annuities at fair value | Future policy benefits |  |
Derivatives, Fair Value [Line Items] |  |
Total liabilities | $ (462.7) | $ (491.4)

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