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Comprehensive Income (Loss) and Accumulated Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2021
Equity [Abstract] |
Components of comprehensive income | The components of comprehensive income (loss) were as follows:
($ in millions) |  | Year Ended December 31,
|  | 2021 |  | 2020 |  | 2019
Net income |  | $ | 142.8 |  |  | $ | 133.3 |  |  | $ | 184.4 |
Other comprehensive income (loss): |  |  |  |  |  |
Change in net unrealized investment gains (losses) on fixed maturity securities: |  |  |  |  |  |
Net unrealized investment gains (losses) on securities arising during the period |  | (104.9) |  |  | 184.0 |  |  | 327.3 |
Less: reclassification adjustment for net investment gains (losses) included in income before income tax |  | (8.5) |  |  | 11.2 |  |  | 157.4 |
Total, before tax |  | (96.4) |  |  | 172.8 |  |  | 169.9 |
Income tax expense (benefit) |  | (20.8) |  |  | 36.9 |  |  | 36.4 |
Total, net of tax |  | (75.6) |  |  | 135.9 |  |  | 133.5 |
Change in net funded status of benefit plans: |  |  |  |  |  |
Before tax |  | 1.2 |  |  | (0.5) |  |  | 1.8 |
Income tax expense (benefit) |  | 0.2 |  |  | (0.1) |  |  | 0.4 |
Total, net of tax |  | 1.0 |  |  | (0.4) |  |  | 1.4 |
Total comprehensive income |  | $ | 68.2 |  |  | $ | 268.8 |  |  | $ | 319.3 |
Accumulated other comprehensive income (loss) | The following table reconciles the components of AOCI for the periods indicated.
($ in millions) |  | Net Unrealized Investment Gains (Losses) on Securities(1)(2) |  | Net Funded Status of Benefit Plans(1) |  | Total(1)
Beginning balance, January 1, 2021 |  | $ | 366.3 |  |  | $ | (11.2) |  |  | $ | 355.1 |
Other comprehensive income (loss) before reclassifications |  | (82.3) |  |  | 1.0 |  |  | (81.3) |
Amounts reclassified from AOCI |  | 6.7 |  |  | — |  |  | 6.7 |
Net current period other comprehensive income (loss) |  | (75.6) |  |  | 1.0 |  |  | (74.6) |
Ending balance, December 31, 2021 |  | $ | 290.7 |  |  | $ | (10.2) |  |  | $ | 280.5 |
Beginning balance, January 1, 2020 |  | $ | 230.4 |  |  | $ | (10.8) |  |  | $ | 219.6 |
Other comprehensive income (loss) before reclassifications |  | 144.7 |  |  | (0.4) |  |  | 144.3 |
Amounts reclassified from AOCI |  | (8.8) |  |  | — |  |  | (8.8) |
Net current period other comprehensive income (loss) |  | 135.9 |  |  | (0.4) |  |  | 135.5 |
Ending balance, December 31, 2020 |  | $ | 366.3 |  |  | $ | (11.2) |  |  | $ | 355.1 |
Beginning balance, January 1, 2019 |  | $ | 96.9 |  |  | $ | (12.2) |  |  | $ | 84.7 |
Other comprehensive income (loss) before reclassifications |  | 257.9 |  |  | 1.4 |  |  | 259.3 |
Amounts reclassified from AOCI |  | (124.4) |  |  | — |  |  | (124.4) |
Net current period other comprehensive income (loss) |  | 133.5 |  |  | 1.4 |  |  | 134.9 |
Ending balance, December 31, 2019 |  | $ | 230.4 |  |  | $ | (10.8) |  |  | $ | 219.6 |
(1) All amounts are net of tax. (2) The pretax amounts reclassified from AOCI, $(8.5) million, $11.2 million and $157.4 million, are included in net investment gains (losses) and the related tax expenses, $(1.8) million, $2.4 million and $33.0 million, are included in income tax expense in the Consolidated Statements of Operations for the years ended December 31, 2021, 2020 and 2019, respectively.

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