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Segment Information - Summary of Segment Activity (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Segment Reporting Information |  |  |  |  |
Net premiums and contract charges earned | $ 280.9 | $ 260.7 | $ 556.1 | $ 516.6 |
Net investment income | 108.4 | 108.5 | 213.8 | 208.9 |
Net income (loss) | 3.8 | (12.8) | 30.3 | (6.2) |
Assets | 14,282.1 |  | 14,282.1 |  | $ 14,049.9
Intersegment eliminations |  |  |  |  |
Segment Reporting Information |  |  |  |  |
Net investment income | (0.5) | (0.5) | (1.0) | (1.1) |
Assets | (58.9) |  | (58.9) |  | (62.4)
Property & Casualty | Operating segments |  |  |  |  |
Segment Reporting Information |  |  |  |  |
Net premiums and contract charges earned | 179.2 | 157.4 | 352.4 | 309.8 |
Net investment income | 9.5 | 10.6 | 21.8 | 14.6 |
Net income (loss) | (8.6) | (21.4) | 2.0 | (33.0) |
Assets | 1,255.9 |  | 1,255.9 |  | 1,218.1
Life & Retirement | Operating segments |  |  |  |  |
Segment Reporting Information |  |  |  |  |
Net premiums and contract charges earned | 38.0 | 37.4 | 75.8 | 75.1 |
Net investment income | 88.9 | 89.3 | 174.7 | 177.2 |
Net income (loss) | 12.3 | 17.4 | 24.0 | 31.4 |
Assets | 11,583.2 |  | 11,583.2 |  | 11,365.0
Supplemental & Group Benefits | Operating segments |  |  |  |  |
Segment Reporting Information |  |  |  |  |
Net premiums and contract charges earned | 63.7 | 65.9 | 127.9 | 131.7 |
Net investment income | 10.5 | 9.1 | 18.3 | 18.2 |
Net income (loss) | 14.1 | 11.8 | 25.1 | 25.8 |
Assets | 1,323.6 |  | 1,323.6 |  | 1,338.8
Corporate & Other |  |  |  |  |
Segment Reporting Information |  |  |  |  |
Net investment income | 0.0 | 0.0 | 0.0 | 0.0 |
Net income (loss) | (14.0) | $ (20.6) | (20.8) | $ (30.4) |
Assets | $ 178.3 |  | $ 178.3 |  | $ 190.4

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