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Long-Duration Insurance Contracts - Deferred Policy Acquisition Costs, Reconciliation to Balance Sheet (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | --- | ---
Deferred Policy Acquisition Cost [Line Items] |  |  |
Deferred policy acquisition costs | $ 341.5 |  | $ 336.3
Whole Life Insurance |  |  |
Deferred Policy Acquisition Cost [Line Items] |  |  |
Deferred policy acquisition costs | 23.0 | $ 22.6 | 22.3
Term Life Insurance |  |  |
Deferred Policy Acquisition Cost [Line Items] |  |  |
Deferred policy acquisition costs | 33.5 | 32.9 | 32.6
Experience Life Insurance |  |  |
Deferred Policy Acquisition Cost [Line Items] |  |  |
Deferred policy acquisition costs | 5.6 | 5.7 | 5.7
Limited Pay Whole Life Insurance |  |  |
Deferred Policy Acquisition Cost [Line Items] |  |  |
Deferred policy acquisition costs | 7.7 | 7.5 | 7.4
Indexed Universal Life Insurance |  |  |
Deferred Policy Acquisition Cost [Line Items] |  |  |
Deferred policy acquisition costs | 17.8 | 17.1 | 16.8
Supplemental health |  |  |
Deferred Policy Acquisition Cost [Line Items] |  |  |
Deferred policy acquisition costs | 9.3 | 8.7 | 8.2
Total Annuities |  |  |
Deferred Policy Acquisition Cost [Line Items] |  |  |
Deferred policy acquisition costs | 212.4 | $ 212.9 | 214.0
Reconciling items |  |  |
Deferred Policy Acquisition Cost [Line Items] |  |  |
Deferred policy acquisition costs | $ 32.2 |  | $ 29.3

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