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FAIR VALUE MEASUREMENTS-CHANGES IN VALUE OF EMBEDDED DERIVATIVES (Details) - Fair Value, Inputs, Level 3 - Fixed Index Annuity Products - Fair Value, Measurements, Recurring - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Liabilities: |  |  |  |
Balance at beginning of the period | $ 1,418.0 | $ 1,355.4 | $ 1,376.7 | $ 1,297.0
Premiums less benefits | (19.4) | (16.2) | (56.3) | (45.9)
Change in fair value, net | 153.3 | (125.8) | 231.5 | (37.7)
Balance at end of the period | $ 1,551.9 | $ 1,213.4 | $ 1,551.9 | $ 1,213.4

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- Definition Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value, Increase (Decrease) in Fair Value + References No definition available. + Details
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- Definition Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value, Premiums Less Benefits + References No definition available. + Details
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