| Revenues | — | — | — |
| Premiums | 5,912.6a | 5,663.1a | 5,252.3a |
| Net investment income | 372.6a | 332.1a | 296.3a |
| Net realized and unrealized investment gains (losses) | — | — | — |
| Net realized losses from sales and other | -84.2a | -8.9a | -26.5a |
| Net change in fair value of equity securities | 14.2a | -5.6a | -63.3a |
| Impairments on investments | — | — | — |
| Credit-related impairments | -3.6a | -7.7a | -1.9a |
| Losses on intent to sell securities | -2.2a | -10.3a | -14.8a |
| Total impairments on investments | -5.8a | -18a | -16.7a |
| Total net realized and unrealized investment losses | -75.8a | -32.5a | -106.5a |
| Fees and other income | 28a | 30.8a | 26.5a |
| Total revenues | 6,237.4a | 5,993.5a | 5,468.6a |
| Losses and expenses | — | — | — |
| Losses and loss adjustment expenses | -3,757.4a | -4,134.6a | -3,623.4a |
| Amortization of deferred acquisition costs | -1,221.7a | -1,176a | -1,093.2a |
| Interest expense | -34.1a | -34.1a | -34.1a |
| Other operating expenses | -686.4a | -607.7a | -573.9a |
| Total losses and expenses | -5,699.6a | -5,952.4a | -5,324.6a |
| Income from continuing operations before income taxes | 537.8a | 41.1a | 144a |
| Income tax expense (benefit) | — | — | — |
| Current | -131.1a | -32.6a | -73.7a |
| Deferred | -18.6a | -25a | -46.5a |
| Total income tax expense | -112.5a | -7.6a | -27.2a |
| Income from continuing operations | 425.3a | 33.5a | 116.8a |
| Discontinued operations | — | — | — |
| Income from Chaucer business, net of taxes | 0.7a | 1.2a | |
| Income (loss) from discontinued life businesses, net of taxes | | 0.6a | -0.8a |
| Net income | 426a | 35.3a | 116a |