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Accumulated Other Comprehensive Income (Loss) (Tables) | 9 Months Ended
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Sep. 30, 2023
Equity [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) | The following table reconciles these components.
($ in millions) |  | Net Unrealized Investment Gains (Losses) on Fixed Maturity Securities(1) |  | Net Reserve Remeasurements Attributable to Discount Rates(1) |  | Net Funded Status of Benefit Plans(1) |  | Total(1)
Beginning balance, July 1, 2023 |  | $ | (393.7) |  |  | $ | 42.9 |  |  | $ | (8.8) |  |  | $ | (359.6) |
Other comprehensive income (loss) before reclassifications |  | (143.7) |  |  | 90.7 |  |  | — |  |  | (53.0) |
Amounts reclassified from AOCI(2) |  | 2.7 |  |  | — |  |  | — |  |  | 2.7 |
Net current period other comprehensive income (loss) |  | (141.0) |  |  | 90.7 |  |  | — |  |  | (50.3) |
Ending balance, September 30, 2023 |  | $ | (534.7) |  |  | $ | 133.6 |  |  | $ | (8.8) |  |  | $ | (409.9) |
Beginning balance, July 1, 2022 |  | $ | (281.8) |  |  | $ | (36.9) |  |  | $ | (10.2) |  |  | $ | (328.9) |
Other comprehensive income (loss) before reclassifications |  | (223.4) |  |  | 110.7 |  |  | — |  |  | (112.7) |
Amounts reclassified from AOCI(3) |  | 8.4 |  |  | — |  |  | — |  |  | 8.4 |
Net current period other comprehensive income (loss) |  | (215.0) |  |  | 110.7 |  |  | — |  |  | (104.3) |
Ending balance, September 30, 2022 |  | $ | (496.8) |  |  | $ | 73.8 |  |  | $ | (10.2) |  |  | $ | (433.2) |
Beginning balance, January 1, 2023 |  | $ | (449.6) |  |  | $ | 59.0 |  |  | $ | (8.8) |  |  | $ | (399.4) |
Other comprehensive income (loss) before reclassifications |  | (101.3) |  |  | 74.6 |  |  | — |  |  | (26.7) |
Amounts reclassified from AOCI(2) |  | 16.2 |  |  | — |  |  | — |  |  | 16.2 |
Net current period other comprehensive income (loss) |  | (85.1) |  |  | 74.6 |  |  | — |  |  | (10.5) |
Ending balance, September 30, 2023 |  | $ | (534.7) |  |  | $ | 133.6 |  |  | $ | (8.8) |  |  | $ | (409.9) |
Beginning balance, January 1, 2022 |  | $ | 347.1 |  |  | $ | (386.9) |  |  | $ | (10.2) |  |  | $ | (50.0) |
Other comprehensive income (loss) before reclassifications |  | (856.5) |  |  | 460.7 |  |  | — |  |  | (395.8) |
Amounts reclassified from AOCI(2) |  | 12.6 |  |  | — |  |  | — |  |  | 12.6 |
Net current period other comprehensive income (loss) |  | (843.9) |  |  | 460.7 |  |  | — |  |  | (383.2) |
Ending balance, September 30, 2022 |  | $ | (496.8) |  |  | $ | 73.8 |  |  | $ | (10.2) |  |  | $ | (433.2) |
(1)All amounts are net of tax. (2)The pretax amounts reclassified from AOCI, $(3.5) million and $(20.5) million, are included in Net investment gains (losses) and the related income tax benefits, $(0.7) million and $(4.3) million, are included in income tax expense in the Consolidated Statements of Operations for the three and nine months ended September 30, 2023, respectively. (3)The pretax amounts reclassified from AOCI, $(10.7) million and $(15.9) million, are included in Net investment gains (losses) and the related income tax benefits, $(2.3) million and $(3.4) million, are included in income tax expense in the Consolidated Statements of Operations for the three and nine months ended September 30, 2022, respectively.

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