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INCOME TAXES (Tables)
 12 Months Ended
Dec. 31, 2023
Income Tax Disclosure [Abstract]  
Schedule of Components of Income Tax Expense (Benefit)
The components of income tax expense (benefit) applicable to pretax earnings for the years ended December 31 were as follows:
(In millions)ForeignU.S.Total
2023:
Current$1,275 $388 $1,663 
Deferred(160)(900)(1,060)
Total income tax expense$1,115 $(512)$603 
2022:
Current$913 $268 $1,181 
Deferred200 (930)(730)
Total income tax expense$1,113 $(662)$451 
2021:
Current$884 $211 $1,095 
Deferred251 (369)(118)
Total income tax expense$1,135 $(158)$977 
Prior-year amounts have been adjusted for the adoption of accounting guidance on January 1, 2023 related to accounting for long-duration insurance contracts.
Schedule of Effective Income Tax Rate Reconciliation The principal reasons for the differences and the related tax effects for the years ended December 31 were as follows:
(In millions)202320222021
Income taxes based on U.S. statutory rates$1,105 $1,023 $1,094 
DST functional currency change(174)(452)0 
Solar and historic tax credits, net of amortization(348)(83)(115)
Other, net20 (37)(2)
Income tax expense$603 $451 $977 
Prior-year amounts have been adjusted for the adoption of accounting guidance on January 1, 2023 related to accounting for long-duration insurance contracts.
Schedule of Income Tax Expense Benefit Intraperiod Tax Allocation
Total income tax expense for the years ended December 31 was allocated as follows:
(In millions)202320222021
Statements of earnings$603 $451 $977 
Other comprehensive income (loss):
Unrealized foreign currency translation gains (losses) during
  period		140 547 15 
Unrealized gains (losses) on fixed maturity securities:
Unrealized holding gains (losses) on fixed maturity
  securities during period		520 (2,657)(194)
Reclassification adjustment for (gains) losses
  on fixed maturity securities included in net earnings		(35)(95)(7)
Unrealized gains (losses) on derivatives during period1 1 1 
Effect of changes in discount rate assumptions during period(122)3,650 728 
Pension liability adjustment during period7 35 30 
Total income tax expense (benefit) related to items of
  other comprehensive income (loss)		511 1,481 573 
Total income taxes$1,114 $1,932 $1,550 
Prior-year amounts have been adjusted for the adoption of accounting guidance on January 1, 2023 related to accounting for long-duration insurance contracts.
Schedule of Deferred Tax Assets and Liabilities
The income tax effects of the temporary differences that gave rise to deferred income tax assets and liabilities as of December 31 were as follows:
(In millions)20232022
Deferred income tax liabilities:
Deferred policy acquisition costs$2,883 $3,056 
Unrealized gains and other basis differences on investments988 0 
Foreign currency gain on Aflac Japan2 147 
Premiums receivable85 59 
Policy benefit reserves110 1,137 
Total deferred income tax liabilities4,068 4,399 
Deferred income tax assets:
Unfunded retirement benefits5 7 
Other accrued expenses28 27 
Policy and contract claims572 671 
Foreign currency loss on Aflac Japan0 0 
Deferred compensation45 65 
Depreciation265 248 
Anticipatory foreign tax credit2,210 1,992 
Deferred foreign tax credit1,077 822 
Other basis differences in investments0 85 
Other135 106 
Total deferred income tax assets4,337 4,023 
Net deferred income tax liability(269)376 
Current income tax (asset) liability423 322 
Total income tax liability$154 $698 
Prior-year amounts have been adjusted for the adoption of accounting guidance on January 1, 2023 related to accounting for long-duration insurance contracts.
Summary of Income Tax Contingencies
A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows for the years ended December 31:
(In millions)2023 2022 
Balance, beginning of year$5 $5 
Additions for tax positions of prior years0   0   
Reductions for tax positions of prior years(4)  0 
Balance, end of year$1 $5