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Long-Duration Insurance Contracts - Deferred Policy Acquisition Costs, Rollforward (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |  |  |
Balance, beginning of period |  |  | $ 336.3 |
Amortization expense | $ (27.0) | $ (25.4) | (54.0) | $ (49.1)
Balance, end of period | 341.5 |  | 341.5 |
Whole Life Insurance |  |  |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |  |  |
Balance, beginning of period | 22.6 |  | 22.3 |
Capitalizations | 0.7 |  | 1.4 |
Amortization expense | (0.3) |  | (0.6) |
Experience adjustment | 0.0 |  | (0.1) |
Balance, end of period | 23.0 |  | 23.0 |
Term Life Insurance |  |  |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |  |  |
Balance, beginning of period | 32.9 |  | 32.6 |
Capitalizations | 1.4 |  | 2.6 |
Amortization expense | (0.8) |  | (1.7) |
Experience adjustment | 0.0 |  | 0.0 |
Balance, end of period | 33.5 |  | 33.5 |
Experience Life Insurance |  |  |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |  |  |
Balance, beginning of period | 5.7 |  | 5.7 |
Capitalizations | 0.0 |  | 0.1 |
Amortization expense | (0.1) |  | (0.2) |
Experience adjustment | 0.0 |  | 0.0 |
Balance, end of period | 5.6 |  | 5.6 |
Limited Pay Whole Life Insurance |  |  |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |  |  |
Balance, beginning of period | 7.5 |  | 7.4 |
Capitalizations | 0.3 |  | 0.5 |
Amortization expense | (0.1) |  | (0.2) |
Experience adjustment | 0.0 |  | 0.0 |
Balance, end of period | 7.7 |  | 7.7 |
Indexed Universal Life Insurance |  |  |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |  |  |
Balance, beginning of period | 17.1 |  | 16.8 |
Capitalizations | 0.9 |  | 1.6 |
Amortization expense | (0.2) |  | (0.5) |
Experience adjustment | 0.0 |  | (0.1) |
Balance, end of period | 17.8 |  | 17.8 |
Supplemental health |  |  |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |  |  |
Balance, beginning of period | 8.7 |  | 8.2 |
Capitalizations | 0.8 |  | 1.6 |
Amortization expense | (0.2) |  | (0.4) |
Experience adjustment | 0.0 |  | (0.1) |
Balance, end of period | 9.3 |  | 9.3 |
Total Annuities |  |  |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |  |  |
Balance, beginning of period | 212.9 |  | 214.0 |
Capitalizations | 4.1 |  | 8.0 |
Amortization expense | (4.2) |  | (7.9) |
Experience adjustment | (0.4) |  | (1.7) |
Balance, end of period | $ 212.4 |  | $ 212.4 |

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