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LIABILITIES FOR INSURANCE PRODUCTS - Liabilities for Insurance Products Related to Fixed Indexed Annuity (Details) - USD ($) $ in Millions | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Policyholder Account Balance [Line Items] |  |
Total fixed indexed annuity insurance liabilities | $ 10,491.6 | $ 9,863.7
Fixed Indexed Annuity |  |
Policyholder Account Balance [Line Items] |  |
Host contract liability | 8,939.7 | 8,487.0
Embedded derivatives at fair value | $ 1,551.9 | $ 1,376.7

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