Policyholder Obligations - Supplemental Financial Information (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Federal Home Loan Bank, Advance, Branch of FHLBank [Line Items] | ||
| Liability under Funding Agreements | $ 608.0 | $ 637.7 |
| United Insurance | FHLB of Chicago | ||
| Federal Home Loan Bank, Advance, Branch of FHLBank [Line Items] | ||
| Liability under Funding Agreements | 513.8 | 541.3 |
| Fair Value of Collateral Pledged | 661.3 | 619.3 |
| FHLB of Chicago Common Stock Owned at Cost | $ 17.7 | $ 16.9 |