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LIABILITIES FOR INSURANCE PRODUCTS - RECONCILIATION OF NET LIABILITY FOR FUTURE POLICY BENEFITS (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Liability for Future Policy Benefit, Activity [Line Items] |  |
Reserves excluded from rollforward | $ 2,443.1 | $ 2,526.9
Deferred profit liability | 67.9 | 64.8
Future loss reserves | 27.4 | 30.7
Future policy benefits | 11,705.5 | 12,188.4
Supplemental health |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Balances included in the future policy benefits rollforwards: | 3,184.3 | 3,305.1
Medicare supplement |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Balances included in the future policy benefits rollforwards: | 214.3 | 227.9
Long-term care |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Balances included in the future policy benefits rollforwards: | 3,137.3 | 3,309.0
Traditional life |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Balances included in the future policy benefits rollforwards: | 2,366.7 | 2,415.1
Other annuities |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Balances included in the future policy benefits rollforwards: | $ 264.5 | $ 308.9

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