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Accumulated Other Comprehensive Income (Loss) (Tables)
 3 Months Ended
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 AOCI6.4 — 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 AOCI10.7 — 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.