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v3.20.4

Business Segments - Segment Operating Profit (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Segment Operating Profit (Loss) |  |  |  |  |  |  |  |  | $ 546.8 | $ 518.8 | $ 286.2
Income (Loss) from Change in Fair Value of Equity and Convertible Securities | $ 73.1 | $ 45.2 | $ 71.6 | $ (117.8) | $ 39.2 | $ 9.8 | $ 25.5 | $ 64.4 | 72.1 | 138.9 | (64.3)
Impairment Losses | 0.5 | (1.0) | (7.0) | (12.0) | (1.7) | (1.8) | (6.7) | (3.6) | (19.5) | (13.8) | (4.5)
Settlement Expense |  |  |  |  |  |  |  |  | (64.1) | 0.0 | 0.0
Loss from Early Extinguishment of Debt |  |  |  |  |  | (5.8) |  |  | 0.0 | (5.8) | 0.0
Income from Continuing Operations before Income Taxes | $ 120.6 | $ 152.1 | $ 159.7 | $ 77.7 | $ 156.9 | $ 161.5 | $ 148.5 | $ 194.7 | 510.1 | 661.6 | 199.1
Operating Segments |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Segment Operating Profit (Loss) |  |  |  |  |  |  |  |  | 493.9 | 530.1 | 290.1
Operating Segments | Specialty Property & Casualty Insurance |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Segment Operating Profit (Loss) |  |  |  |  |  |  |  |  | 420.9 | 355.9 | 145.6
Operating Segments | Preferred Property & Casualty Insurance |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Segment Operating Profit (Loss) |  |  |  |  |  |  |  |  | 1.8 | 52.3 | 28.6
Operating Segments | Life & Health Insurance |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Segment Operating Profit (Loss) |  |  |  |  |  |  |  |  | 71.2 | 121.9 | 115.9
Corporate, Non-Segment |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Segment Operating Profit (Loss) |  |  |  |  |  |  |  |  | 52.9 | (11.3) | (3.9)
Partial Satisfaction of Judgment |  |  |  |  |  |  |  |  | 89.4 | 20.1 | 35.7
Other |  |  |  |  |  |  |  |  | (36.5) | (31.4) | (39.6)
Segment Reconciling Items |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income (Loss) from Change in Fair Value of Equity and Convertible Securities |  |  |  |  |  |  |  |  | 72.1 | 138.9 | (64.3)
Net Realized Gains on the Sales of Investments |  |  |  |  |  |  |  |  | 38.1 | 41.9 | 26.4
Impairment Losses |  |  |  |  |  |  |  |  | (19.5) | (13.8) | (4.5)
Acquisition Related Transaction, Integration and Other Costs |  |  |  |  |  |  |  |  | (63.3) | (18.4) | (44.7)
Settlement Expense |  |  |  |  |  |  |  |  | $ (64.1) | $ 0.0 | $ 0.0

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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk related to obligation and assets used to effect settlement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(7) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3A -URI http://asc.fasb.org/extlink&oid=109237824&loc=SL108413299-114919 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(7) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920 + Details
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