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OTHER OPERATING STATEMENT DATA - SCHEDULE OF CHANGES IN DEFERRED ACQUISITION COSTS (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |  |
Beginning of period | $ 1,851.3 | $ 1,690.4 | $ 1,553.3
Capitalizations | 389.4 | 353.5 | 313.5
Amortization expense | (215.3) | (192.6) | (176.4)
End of period | 2,025.4 | 1,851.3 | 1,690.4
Fixed indexed annuities |  |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |  |
Beginning of period | 407.6 | 365.6 | 313.0
Capitalizations | 99.2 | 88.9 | 92.8
Amortization expense | (56.8) | (46.9) | (40.2)
End of period | 450.0 | 407.6 | 365.6
Fixed interest annuities |  |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |  |
Beginning of period | 27.0 | 19.6 | 19.0
Capitalizations | 14.0 | 11.3 | 4.1
Amortization expense | (5.1) | (3.9) | (3.5)
End of period | 35.9 | 27.0 | 19.6
Supplemental health |  |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |  |
Beginning of period | 408.0 | 378.8 | 357.5
Capitalizations | 64.6 | 60.6 | 50.5
Amortization expense | (34.5) | (31.4) | (29.2)
End of period | 438.1 | 408.0 | 378.8
Medicare supplement |  |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |  |
Beginning of period | 157.5 | 161.2 | 170.2
Capitalizations | 26.0 | 24.1 | 20.7
Amortization expense | (26.1) | (27.8) | (29.7)
End of period | 157.4 | 157.5 | 161.2
Long-term care |  |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |  |
Beginning of period | 140.3 | 137.9 | 136.4
Capitalizations | 23.1 | 17.5 | 16.8
Amortization expense | (14.8) | (15.1) | (15.3)
End of period | 148.6 | 140.3 | 137.9
Interest-sensitive life |  |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |  |
Beginning of period | 234.5 | 212.2 | 196.3
Capitalizations | 37.1 | 36.8 | 29.8
Amortization expense | (15.6) | (14.5) | (13.9)
End of period | 256.0 | 234.5 | 212.2
Traditional life |  |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |  |
Beginning of period | 471.9 | 409.1 | 357.6
Capitalizations | 117.6 | 114.3 | 94.6
Amortization expense | (60.0) | (51.5) | (43.1)
End of period | 529.5 | 471.9 | 409.1
Funding agreements |  |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |  |
Beginning of period | 4.5 | 6.0 | 3.3
Capitalizations | 7.8 | 0.0 | 4.2
Amortization expense | (2.4) | (1.5) | (1.5)
End of period | $ 9.9 | $ 4.5 | $ 6.0

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