| Fiscal period | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|
| Period End Date | 12/31/2024 | 12/31/2023 | 12/31/2022 | 12/31/2021 | 12/31/2020 | 12/31/2019 | 12/31/2018 | 12/31/2017 | 12/31/2016 | 12/31/2015 |
|---|
| Gross Amount | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Assumed from other companies | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Ceded to Other Companies | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Premiums | 5,912.60 | 5,663.10 | 5,252.30 | 4,770.20 | 4,527.40 | 4,474.50 | 4,254.40 | 4,833.40 | 4,628.10 | 4,704.80 |
| Net realized investment (losses) gains | (84.20) | (32.50) | (106.50) | 123.00 | 5.00 | 109.40 | (50.70) | 23.70 | 8.60 | 46.30 |
| Total other-than-temporary impairment losses on securities | (5.80) | -- | -- | -- | -- | -- | -- | -- | -- | (26.80) |
| Portion of loss recognized in other comprehensive income | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Less investment expenses | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Net investment income | 372.60 | 332.10 | 296.30 | 310.70 | 265.10 | 281.30 | 267.40 | 298.10 | 279.40 | 279.10 |
| Fixed maturities | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Equity securities | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Policy loans | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Short-term investments | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Mortgage loans | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Other Long-term Investments | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Derivative instruments | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Fees and other income | 28.00 | 30.80 | 26.50 | 23.90 | 29.80 | 25.50 | 23.20 | 29.20 | 29.70 | 30.60 |
| Universal life and investment product policy fees | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Other income (loss) | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Net change in fair value of equity securities | 14.20 | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Total Revenues | 6,237.40 | 5,993.50 | 5,468.60 | 5,227.80 | 4,827.30 | 4,890.70 | 4,494.30 | 5,184.40 | 4,945.80 | 5,034.00 |
| Loss from selected property and casualty exited agencies, policies, groups, and programs | 3,757.40 | 4,134.60 | 3,623.40 | 3,134.20 | 2,845.20 | 2,865.50 | 2,724.60 | -- | -- | -- |
| Policy benefits, claims, losses and loss adjustment expenses | -- | -- | -- | -- | -- | -- | -- | 3,128.70 | 2,964.70 | 2,884.10 |
| Policy acquisition expenses | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Amortization of deferred acquisition costs | 1,221.70 | 1,176.00 | 1,093.20 | 982.70 | 951.00 | 926.70 | 891.80 | 1,086.60 | 1,035.20 | 1,033.20 |
| Interest expense | 34.10 | 34.10 | 34.10 | 34.00 | 37.10 | 37.50 | 45.10 | 48.50 | 54.90 | 60.10 |
| Other operating expenses | (686.40) | (607.70) | (573.90) | (555.60) | (543.00) | (538.90) | (522.10) | (619.10) | (611.50) | (655.60) |
| Gain on disposal of U.K motor business | -- | -- | -- | -- | -- | -- | -- | -- | 1.10 | 38.40 |
| Total losses and expenses | 5,699.60 | 5,952.40 | 5,324.60 | -- | 4,382.50 | 4,368.60 | 4,211.80 | 4,882.90 | -- | 4,594.60 |
| Restructuring costs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Voluntary pool environmental losses | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Gain from retirement of trust instruments supported by funding obligations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Net losses (gains) on derivative instruments | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income from sale of universal life business | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| (Loss) gain from retirement of debt | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Net loss from repayment of debt | -- | -- | -- | -- | (6.20) | -- | (28.20) | -- | (88.30) | -- |
| Income before Federal income taxes | 537.80 | 41.10 | 144.00 | 521.30 | 444.80 | 522.10 | 282.50 | 301.50 | 192.30 | 439.40 |
| Current | 131.10 | 32.60 | 73.70 | 77.50 | 105.90 | 80.50 | 46.20 | 57.40 | 52.10 | 55.80 |
| Deferred | (18.60) | (25.00) | (46.50) | 23.80 | (23.10) | 12.60 | (2.70) | 41.10 | (15.90) | 52.80 |
| Total federal income tax expense (benefit) | 112.50 | 7.60 | 27.20 | 101.30 | 82.80 | 93.10 | 43.50 | 98.50 | 36.20 | 108.60 |
| Minority interest: Distributions on mandatorily redeemable preferred securities of a subsidiary trust holding solely jun | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income from continuing operations | 425.30 | 33.50 | 116.80 | 420.00 | 362.00 | 429.00 | 239.00 | 203.00 | 156.10 | 330.80 |
| Income from operations of discontinued variable life insurance and annuity business (net of income tax (benefit) expense | -- | -- | (0.80) | -- | (3.70) | -- | -- | (16.80) | (1.00) | -- |
| Loss on disposal of variable life insurance and annuity business (net of income tax benefit) | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income (loss) from operations of discontinued business, net | -- | 0.60 | -- | (2.50) | -- | (4.30) | 0.10 | -- | -- | 0.70 |
| Gain on sale of Financial Profiles, Inc., net of income tax expense | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Discontinued operations: Income from the operations of AMGRO, net of tax benefit, including gain on disposal | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Gain (loss) from operations of discontinued accident and health business | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Other discontinued operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Gain from sale of Chaucer business, net of taxes | -- | -- | -- | -- | -- | (1.20) | 131.90 | -- | -- | -- |
| Income (loss) from Chaucer business, net of taxes | 0.70 | 1.20 | -- | 1.20 | 0.40 | 1.60 | 20.00 | -- | -- | -- |
| Income (Loss) before Cumulative Effect of Change in Accounting Principle | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Cumulative Effect of Change in Accounting Principle | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Net income (loss) attributable to common stockholders | 426.00 | 35.30 | 116.00 | 418.70 | 358.70 | 425.10 | 391.00 | 186.20 | 155.10 | 331.50 |
| Basic: Income from continuing operations | 11.83 | 0.94 | 3.28 | 11.70 | 9.61 | 10.72 | 5.63 | 4.78 | 3.65 | 7.53 |
| Basic: Income from operations of discontinued variable life insurance and annuity business (net of income tax (benefit) | -- | -- | -- | -- | (0.10) | -- | -- | -- | (0.02) | 0.02 |
| Basic: Loss on disposal of variable life insurance and annuity business (net of income tax benefit) | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Basic: Loss on disposal of group life and health business | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Basic: Income from operations of discontinued business, net | -- | 0.02 | (0.02) | (0.06) | -- | (0.11) | -- | (0.40) | -- | -- |
| Basic: Gain on sale of Financial Profiles, Inc., net of income tax expense | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Basic: Income from operations of AMGRO | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Sale of Chaucer business | -- | -- | -- | -- | -- | (0.03) | 3.11 | -- | -- | -- |
| Income (loss) from Chaucer business | 0.02 | 0.03 | -- | 0.03 | 0.01 | 0.04 | 0.47 | -- | -- | -- |
| Basic - Cumulative effect of change in accounting principle | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Basic: Net income (loss) per share | 11.85 | 0.99 | 3.26 | 11.67 | 9.52 | 10.62 | 9.21 | 4.38 | 3.63 | 7.55 |
| Diluted: Income from continuing operations | 11.68 | 0.93 | 3.23 | 11.52 | 9.50 | 10.56 | 5.56 | 4.73 | 3.61 | 7.39 |
| Diluted: Income from operations of discontinued variable life insurance and annuity business (net of income tax (benefit | -- | -- | -- | -- | (0.09) | -- | -- | -- | (0.02) | 0.01 |
| Diluted - Loss on disposal of variable life insurance and annuity business (net of income tax benefit) | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Diluted: Loss on disposal of group life and health business | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Diluted: Income from operations of discontinued business, net | -- | 0.02 | (0.02) | 0.03 | -- | (0.11) | -- | (0.40) | -- | -- |
| Diluted: Gain on sale of Financial Profiles, Inc., net of income tax expense | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Dilued: Income from operations of AMGRO | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Sale of Chaucer business | -- | -- | -- | -- | -- | (0.03) | 3.07 | -- | -- | -- |
| Income (loss) from Chaucer business | 0.02 | 0.03 | -- | (0.06) | 0.01 | 0.04 | 0.46 | -- | -- | -- |
| Diluted - Cumulative effect of change in accounting principle | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Diluted: Net income (loss) per share | 11.70 | 0.98 | 3.21 | 11.49 | 9.42 | 10.46 | 9.09 | 4.33 | 3.59 | 7.40 |
| Basic - Weighted average shares outstanding | 35.90 | 35.70 | 35.60 | 35.90 | 37.70 | 40.00 | 42.40 | 42.50 | 42.80 | 43.90 |
| Diluted - Weighted average shares outstanding | 36.40 | 36.10 | 36.10 | 36.40 | 38.10 | 40.60 | 43.00 | 43.00 | 43.20 | 44.80 |