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DEFERRED ACQUISITION COSTS, PRESENT VALUE OF FUTURE PROFITS AND SALES INDUCEMENTS - DEFERRED ACQUISITION COSTS (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2026 | Mar. 31, 2025
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |
Beginning of period | $ 2,220.7 | $ 2,025.4
Capitalizations | 100.6 | 99.3
Amortization expense | (63.8) | (57.8)
End of period | 2,257.5 | 2,066.9
Fixed indexed annuities |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |
Beginning of period | 497.4 | 450.0
Capitalizations | 25.4 | 24.6
Amortization expense | (17.3) | (15.6)
End of period | 505.5 | 459.0
Fixed interest annuities |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |
Beginning of period | 41.8 | 35.9
Capitalizations | 2.3 | 3.5
Amortization expense | (1.7) | (1.6)
End of period | 42.4 | 37.8
Supplemental health |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |
Beginning of period | 473.5 | 438.1
Capitalizations | 17.7 | 17.9
Amortization expense | (10.0) | (9.2)
End of period | 481.2 | 446.8
Medicare supplement |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |
Beginning of period | 162.9 | 157.4
Capitalizations | 10.3 | 7.2
Amortization expense | (6.2) | (6.3)
End of period | 167.0 | 158.3
Long-term care |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |
Beginning of period | 165.3 | 148.6
Capitalizations | 8.3 | 6.9
Amortization expense | (4.2) | (3.8)
End of period | 169.4 | 151.7
Interest-sensitive life |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |
Beginning of period | 277.5 | 256.0
Capitalizations | 9.4 | 8.5
Amortization expense | (4.6) | (4.1)
End of period | 282.3 | 260.4
Traditional life |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |
Beginning of period | 592.2 | 529.5
Capitalizations | 26.9 | 30.7
Amortization expense | (18.7) | (16.4)
End of period | 600.4 | 543.8
Funding agreements |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |
Beginning of period | 10.1 | 9.9
Capitalizations | 0.3 | 0.0
Amortization expense | (1.1) | (0.8)
End of period | $ 9.3 | $ 9.1

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