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Accumulated Other Comprehensive Income (Loss) (Tables) | 3 Months Ended
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Mar. 31, 2021
Equity [Abstract] |
Schedule of accumulated other comprehensive income (loss) | The following table reconciles these components.
($ 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 |  | (129.1) |  |  | — |  |  | (129.1) |
Amounts reclassified from AOCI |  | 6.4 |  |  | — |  |  | 6.4 |
Net current period other comprehensive income (loss) |  | (122.7) |  |  | — |  |  | (122.7) |
Ending balance, March 31, 2021 |  | $ | 243.6 |  |  | $ | (11.2) |  |  | $ | 232.4 |
Beginning balance, January 1, 2020 |  | $ | 230.4 |  |  | $ | (10.7) |  |  | $ | 219.7 |
Other comprehensive income (loss) before reclassifications |  | (104.5) |  |  | — |  |  | (104.5) |
Amounts reclassified from AOCI |  | 10.7 |  |  | — |  |  | 10.7 |
Net current period other comprehensive income (loss) |  | (93.8) |  |  | — |  |  | (93.8) |
Ending balance, March 31, 2020 |  | $ | 136.6 |  |  | $ | (10.7) |  |  | $ | 125.9 |
(1) All amounts are net of tax. (2) The pretax amounts reclassified from AOCI, $(8.1) million and $(13.6) million, are included in Net investment losses and the related income tax expenses, $(1.7) million and $(2.9) million, are included in Income tax expense in the Consolidated Statements of Operations for the three month periods ended March 31, 2021 and 2020 respectively.

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
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