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Other Comprehensive Income and Accumulated Other Comprehensive Loss | 9 Months Ended
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Sep. 30, 2025
Statement of Comprehensive Income [Abstract] |
Other Comprehensive Income and Accumulated Other Comprehensive Loss | Other Comprehensive Income and Accumulated Other Comprehensive Loss The tables below display the changes in Accumulated Other Comprehensive Loss by component for the three months ended September 30, 2025 and 2024.
(Dollars in Millions) |  | Net Unrealized Losses on Fixed Maturities |  | Net Unrealized Losses on Investments with an Allowance for Credit Losses |  | Net Unrecognized Postretirement Benefit Income |  | Net Loss on Cash Flow Hedges |  | Change in Discount Rate on Future Life Policyholder Benefits |  | Total
Balance as of June 30, 2025 |  | $ | (631.7) |  |  | $ | (2.2) |  |  | $ | 7.6 |  |  | $ | (1.4) |  |  | $ | 370.0 |  |  | $ | (257.7) |
Other Comprehensive Income (Loss) Before Reclassifications |  | 84.7 |  |  | (5.1) |  |  | — |  |  | 0.6 |  |  | (54.0) |  |  | 26.2 |
Amounts Reclassified from Accumulated Other Comprehensive Loss Net of Tax Expense of $0.2, $1.2, $0.0, $0.0, $0.0 and $1.4 |  | 0.7 |  |  | 4.3 |  |  | (0.5) |  |  | (0.1) |  |  | — |  |  | 4.4 |
Other Comprehensive Income (Loss) Net of Tax Expense (Benefit) of $22.4, $(0.2), $0.0, $0.2, $(14.4), and $8.0 |  | 85.4 |  |  | (0.8) |  |  | (0.5) |  |  | 0.5 |  |  | (54.0) |  |  | 30.6 |
Balance as of September 30, 2025 |  | $ | (546.3) |  |  | $ | (3.0) |  |  | $ | 7.1 |  |  | $ | (0.9) |  |  | $ | 316.0 |  |  | $ | (227.1) |
(Dollars in Millions) |  | Net Unrealized Losses on Fixed Maturities |  | Net Unrealized Losses on Investments with an Allowance for Credit Losses |  | Net Unrecognized Postretirement Benefit Costs |  | Net (Loss) Gain on Cash Flow Hedges |  | Change in Discount Rate on Future Life Policyholder Benefits |  | Total
Balance as of June 30, 2024 |  | $ | (679.6) |  |  | $ | (3.7) |  |  | $ | 8.3 |  |  | $ | (0.3) |  |  | $ | 358.0 |  |  | $ | (317.3) |
Other Comprehensive Income (Loss) Before Reclassifications |  | 226.4 |  |  | 0.2 |  |  | — |  |  | 3.5 |  |  | (165.2) |  |  | 64.9 |
Amounts Reclassified from Accumulated Other Comprehensive Loss Net of Tax (Benefit) Expense of $0.0, $0.0,$(0.1), $0.1, $0.0, and $0.0 |  | 0.1 |  |  | — |  |  | (0.6) |  |  | 0.4 |  |  | — |  |  | (0.1) |
Other Comprehensive Income (Loss) Net of Tax Expense (Benefit) of $60.1, $(0.2), $(0.1), $1.0 $(43.9) and $16.9 |  | 226.5 |  |  | 0.2 |  |  | (0.6) |  |  | 3.9 |  |  | (165.2) |  |  | 64.8 |
Balance as of September 30, 2024 |  | $ | (453.1) |  |  | $ | (3.5) |  |  | $ | 7.7 |  |  | $ | 3.6 |  |  | $ | 192.8 |  |  | $ | (252.5) |
Note 12 - Other Comprehensive Income and Accumulated Other Comprehensive Loss (Continued) The tables below display the changes in Accumulated Other Comprehensive Loss by component for the nine months ended September 30, 2025 and 2024.
(Dollars in Millions) |  | Net Unrealized Losses on Fixed Maturities |  | Net Unrealized Losses on Investments with an Allowance for Credit Losses |  | Net Unrecognized Postretirement Benefit Income |  | Net Loss on Cash Flow Hedges |  | Change in Discount Rate on Future Life Policyholder Benefits |  | Total
Balance as of January 1, 2025 |  | $ | (687.8) |  |  | $ | (3.2) |  |  | $ | 8.4 |  |  | $ | (2.2) |  |  | $ | 380.3 |  |  | (304.5) |
Other Comprehensive Income (Loss) Before Reclassifications |  | 140.7 |  |  | (0.3) |  |  | — |  |  | 1.4 |  |  | (64.3) |  |  | 77.5 |
Amounts Reclassified from Accumulated Other Comprehensive Loss Net of Tax Expense (Benefit) of $0.2, $0.2, $(0.3), $0.0, $0.0 and $0.1 |  | 0.8 |  |  | 0.5 |  |  | (1.3) |  |  | (0.1) |  |  | — |  |  | (0.1) |
Other Comprehensive Income (Loss) Net of Tax Expense (Benefit) of $37.3, $0.1, $(0.3), $(0.2), $(17.1), and $19.8 |  | 141.5 |  |  | 0.2 |  |  | (1.3) |  |  | 1.3 |  |  | (64.3) |  |  | 77.4 |
Balance as of September 30, 2025 |  | $ | (546.3) |  |  | $ | (3.0) |  |  | $ | 7.1 |  |  | $ | (0.9) |  |  | $ | 316.0 |  |  | $ | (227.1) |
(Dollars in Millions) |  | Net Unrealized Losses on Fixed Maturities |  | Net Unrealized Losses on Investments with an Allowance for Credit Losses |  | Net Unrecognized Postretirement Benefit Costs |  | Net Gain on Cash Flow Hedges |  | Change in Discount Rate on Future Life Policyholder Benefits |  | Total
Balance as of January 1, 2024 |  | $ | (530.9) |  |  | $ | (2.5) |  |  | $ | 9.5 |  |  | $ | 2.5 |  |  | $ | 160.6 |  |  | $ | (360.8) |
Other Comprehensive Income (Loss) Before Reclassifications |  | 68.9 |  |  | (0.5) |  |  | — |  |  | 0.7 |  |  | 32.2 |  |  | 101.3 |
Amounts Reclassified from Accumulated Other Comprehensive Loss Net of Tax Expense (Benefit) of $2.3, $(0.2), $(0.6), $0.1, $0.0 and $1.6 |  | 8.9 |  |  | (0.5) |  |  | (1.8) |  |  | 0.4 |  |  | — |  |  | 7.0 |
Other Comprehensive Income (Loss) Net of Tax Expense (Benefit) of $20.6, $(0.7), $(0.6), $0.2, $8.6, and $28.1 |  | 77.8 |  |  | (1.0) |  |  | (1.8) |  |  | 1.1 |  |  | 32.2 |  |  | 108.3 |
Balance as of September 30, 2024 |  | $ | (453.1) |  |  | $ | (3.5) |  |  | $ | 7.7 |  |  | $ | 3.6 |  |  | $ | 192.8 |  |  | $ | (252.5) |
Amounts reclassified from Accumulated Other Comprehensive Loss shown above are reported in Net (Loss) Income as follows:
Components of AOCI | Condensed Consolidated Statements of (Loss) Income Line Item Affected by Reclassifications
Net Unrealized Losses on Fixed Maturities | Net Realized Investment Gains
Net Unrealized Losses on Investments with an Allowance for Credit Losses | Impairment Losses and Net Realized Investment Gains
Net Unrecognized Postretirement Benefit Costs | Policyholders’ Benefits and Incurred Losses and Loss Adjustment Expenses, Insurance and Other Expenses, and Interest Expense
Net (Loss) Gain on Cash Flow Hedges | Net Investment Income and Interest Expense

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/220/tableOfContent + Details
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