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Accumulated Other Comprehensive Income (Loss) by Component
 12 Months Ended
Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Accumulated Other Comprehensive Income (Loss) by Component Accumulated Other Comprehensive Income (Loss) by Component
The tables below display the changes in Accumulated other comprehensive income (loss) by component.
(In millions)
Net unrealized gains (losses) on investments with an allowance for credit losses(1)
Net unrealized gains (losses) on other investments(1)
Pension and postretirement benefitsCumulative foreign currency translation adjustmentTotal
Balance as of January 1, 2020$— $1,025 $(833)$(141)$51 
Other comprehensive income (loss) before reclassifications(43)763 (53)47 714 
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (expense) benefit of $12, $(12), $10, $— and $10
(43)43 (38)— (38)
Other comprehensive income (loss) net of tax (expense) benefit of $—, $(189), $4, $— and $(185)
— 720 (15)47 752 
Balance as of December 31, 2020$— $1,745 $(848)$(94)$803 
(In millions)
Net unrealized gains (losses) on investments with OTTI losses(1)
Net unrealized gains (losses) on other investments(1)
Pension and postretirement benefitsCumulative foreign currency translation adjustmentTotal
Balance as of January 1, 2019$16 $61 $(775)$(180)$(878)
Other comprehensive income (loss) before reclassifications(13)957 (89)39 894 
Amounts reclassified from accumulated other comprehensive income (loss) net of tax (expense) benefit of $3, $(1), $8, $— and $10
(12)8 (31)— (35)
Other comprehensive income (loss) net of tax (expense) benefit of $—, $(255), $15, $— and $(240)
(1)949 (58)39 929 
Balance as of December 31, 2019$15 $1,010 $(833)$(141)$51 
(1)    As of January 1, 2020, the Company adopted ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. The Net unrealized gains (losses) on investments with OTTI losses column that tracked the change in unrealized gains (losses) on investments with OTTI losses has been replaced with the Net unrealized gains (losses) on investments with an allowance for credit losses column. The balances previously reported in the Net unrealized gains (losses) on investments with OTTI losses column are now reported in the Net unrealized gains (losses) on other investments column.

Amounts reclassified from Accumulated other comprehensive income (loss) shown above are reported in Net income (loss) as follows:
Component of AOCIConsolidated Statements of Operations Line Item Affected by Reclassifications
Net unrealized gains (losses) on investments with an allowance for credit losses, Net unrealized gains (losses) on investments with OTTI losses and Net unrealized gains (losses) on other investmentsNet investment gains (losses)
Pension and postretirement benefitsOther operating expenses and Insurance claims and policyholders' benefits