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Segment Information | 12 Months Ended
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Dec. 31, 2023
Segment Reporting [Abstract] |
Segment Information | The Company conducts and manages its business through four reporting segments. The three reporting segments representing the major lines of business, are: (1) Property & Casualty (primarily personal lines of auto and property insurance products), (2) Life & Retirement (primarily tax-qualified fixed and variable annuities as well as life insurance products), and (3) Supplemental & Group Benefits (primarily cancer, heart, hospital, supplemental disability, accident, short-term and long-term group disability, and group term life coverages). The Company does not allocate the impact of corporate-level transactions to these reporting segments, consistent with the basis for management's evaluation of the results of those reporting segments, but classifies those items in the fourth reporting segment, Corporate & Other. In addition to ongoing transactions such as corporate debt service, net investment gains (losses) and certain public company expenses, such items also have included corporate debt retirement costs, when applicable. The accounting policies of the reporting segments are the same as those described in Note 1. The Company accounts for intersegment transactions, primarily the allocation of operating and agency costs from Corporate & Other to Property & Casualty, Life & Retirement, and Supplemental & Group Benefits on a direct cost basis. Summarized financial information for these segments is as follows (2022 and 2021 recast for the adoption of LDTI):
($ in millions) |  | December 31,
|  | 2023 |  | 2022 |  | 2021
Net premiums and contract charges earned |  |  |  |  |  |
Property & Casualty |  | $ | 645.6 |  |  | $ | 608.2 |  |  | $ | 617.4 |
Life & Retirement |  | 151.7 |  |  | 144.0 |  |  | 143.4 |
Supplemental & Group Benefits(1) |  | 259.8 |  |  | 275.5 |  |  | 128.0 |
Total |  | $ | 1,057.1 |  |  | $ | 1,027.7 |  |  | $ | 888.8 |
Net investment income |  |  |  |  |  |
Property & Casualty |  | $ | 37.9 |  |  | $ | 31.4 |  |  | $ | 61.1 |
Life & Retirement |  | 369.9 |  |  | 338.3 |  |  | 338.6 |
Supplemental & Group Benefits(1) |  | 38.9 |  |  | 33.3 |  |  | 25.2 |
Corporate & Other |  | 0.3 |  |  | — |  |  | (0.1) |
Intersegment eliminations |  | (2.2) |  |  | (2.1) |  |  | (2.3) |
Total |  | $ | 444.8 |  |  | $ | 400.9 |  |  | $ | 422.5 |
Net income (loss) |  |  |  |  |  |
Property & Casualty |  | $ | (35.5) |  |  | $ | (44.4) |  |  | $ | 57.0 |
Life & Retirement |  | 71.5 |  |  | 63.8 |  |  | 89.1 |
Supplemental & Group Benefits(1) |  | 54.9 |  |  | 65.9 |  |  | 52.9 |
Corporate & Other |  | (45.9) |  |  | (65.5) |  |  | (28.6) |
Total |  | $ | 45.0 |  |  | $ | 19.8 |  |  | $ | 170.4 |
($ in millions) |  | December 31,
|  | 2023 |  | 2022 |  | 2021
Assets |  |  |  |  |  |
Property & Casualty |  | $ | 1,218.1 |  |  | $ | 1,083.8 |  |  | $ | 1,243.4 |
Life & Retirement |  | 11,365.0 |  |  | 10,754.4 |  |  | 12,144.2 |
Supplemental & Group Benefits(1) |  | 1,338.8 |  |  | 1,359.3 |  |  | 855.6 |
Corporate & Other |  | 190.4 |  |  | 173.4 |  |  | 281.8 |
Intersegment eliminations |  | (62.4) |  |  | (64.8) |  |  | (64.8) |
Total |  | $ | 14,049.9 |  |  | $ | 13,306.1 |  |  | $ | 14,460.2 |
Additional significant financial information for these segments is as follows (2022 and 2021 recast for the adoption of LDTI):
($ in millions) |  | Years Ended December 31,
|  | 2023 |  | 2022 |  | 2021
DAC amortization expense |  |  |  |  |  |
Property & Casualty |  | $ | 71.3 |  |  | $ | 64.3 |  |  | $ | 67.7 |
Life & Retirement |  | 28.0 |  |  | 23.0 |  |  | 22.0 |
Supplemental & Group Benefits(1) |  | 1.9 |  |  | 0.9 |  |  | 0.9 |
Total |  | $ | 101.2 |  |  | $ | 88.2 |  |  | $ | 90.6 |
Income tax expense (benefit) |  |  |  |  |  |
Property & Casualty |  | $ | (9.8) |  |  | $ | (13.8) |  |  | $ | 13.2 |
Life & Retirement |  | 15.1 |  |  | 10.6 |  |  | 19.3 |
Supplemental & Group Benefits(1) |  | 14.8 |  |  | 18.1 |  |  | 14.5 |
Corporate & Other |  | (11.8) |  |  | (18.2) |  |  | (7.3) |
Total |  | $ | 8.3 |  |  | $ | (3.3) |  |  | $ | 39.7 |
(1) Group Benefits was acquired effective January 1, 2022 and thus, comparison to amounts for the year ended December 31, 2021 is not meaningful.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-22 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-15 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 31 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-31 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-42 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-40 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//280/tableOfContent Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 26 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-26 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 34 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-34 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 41 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-41 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-21 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-21 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 + Details
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