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LIABILITIES FOR INSURANCE PRODUCTS - RECONCILIATION OF LIABILITY FOR POLICYHOLDER ACCOUNT BALANCES (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Policyholder Account Balance [Line Items] |  |
Balance | $ 17,615.8 | $ 15,222.5
Fixed indexed annuities |  |
Policyholder Account Balance [Line Items] |  |
Balance | 10,465.8 | 9,678.6
Fixed interest annuities |  |
Policyholder Account Balance [Line Items] |  |
Balance | 2,187.0 | 2,228.8
Other annuities |  |
Policyholder Account Balance [Line Items] |  |
Balance | 135.6 | 138.3
Interest-sensitive life |  |
Policyholder Account Balance [Line Items] |  |
Balance | 1,437.0 | 1,374.5
Funding agreements |  |
Policyholder Account Balance [Line Items] |  |
Balance | 3,021.2 | 1,411.0
Other |  |
Policyholder Account Balance [Line Items] |  |
Balance | $ 369.2 | $ 391.3

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