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INVESTMENTS - Schedule of Aggregate Fair Value and Gross Unrealized Depreciation of Fixed Maturity Securities by Security Type (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Fair Value    
Less than 12 months $ 2,566 $ 15,215
Greater than 12 months 12,222 4,432
Total 14,789 19,647
Gross Unrealized Depreciation    
Less than 12 months (102) (1,217)
Greater than 12 months (1,035) (764)
Total (1,137) (1,982)
No Recorded Allowance for Credit Losses    
Fair Value    
Less than 12 months 2,564 15,213
Greater than 12 months 12,222 4,432
Total 14,787 19,645
Gross Unrealized Depreciation    
Less than 12 months (101) (1,217)
Greater than 12 months (1,035) (764)
Total (1,136) (1,982)
U.S. Treasury securities and obligations of U.S. government agencies and corporations    
Fair Value    
Less than 12 months 122 668
Greater than 12 months 772 487
Total 893 1,155
Gross Unrealized Depreciation    
Less than 12 months (3) (31)
Greater than 12 months (49) (52)
Total (52) (82)
Obligations of U.S. States and political subdivisions    
Fair Value    
Less than 12 months 3 235
Greater than 12 months 74 27
Total 77 261
Gross Unrealized Depreciation    
Less than 12 months 0 (23)
Greater than 12 months (11) (9)
Total (11) (32)
Corporate securities    
Fair Value    
Less than 12 months 1,019 4,143
Greater than 12 months 2,780 1,316
Total 3,799 5,459
Gross Unrealized Depreciation    
Less than 12 months (58) (326)
Greater than 12 months (263) (234)
Total (321) (561)
Asset-backed securities    
Fair Value    
Less than 12 months 196 3,204
Greater than 12 months 2,014 456
Total 2,210 3,661
Gross Unrealized Depreciation    
Less than 12 months (2) (142)
Greater than 12 months (49) (29)
Total (51) (171)
Commercial    
Fair Value    
Less than 12 months 181 806
Greater than 12 months 742 101
Total 923 907
Gross Unrealized Depreciation    
Less than 12 months (19) (90)
Greater than 12 months (73) (15)
Total (92) (105)
Agency residential    
Fair Value    
Less than 12 months 423 1,905
Greater than 12 months 2,126 870
Total 2,549 2,776
Gross Unrealized Depreciation    
Less than 12 months (4) (132)
Greater than 12 months (225) (158)
Total (229) (289)
Non-agency residential    
Fair Value    
Less than 12 months 126 4
Greater than 12 months 4 1
Total 130 4
Gross Unrealized Depreciation    
Less than 12 months (1) 0
Greater than 12 months 0 (1)
Total 0 0
Foreign government securities    
Fair Value    
Less than 12 months 172 985
Greater than 12 months 985 321
Total 1,156 1,306
Gross Unrealized Depreciation    
Less than 12 months (7) (100)
Greater than 12 months (101) (79)
Total (108) (179)
Foreign corporate securities    
Fair Value    
Less than 12 months 324 3,264
Greater than 12 months 2,726 853
Total 3,050 4,117
Gross Unrealized Depreciation    
Less than 12 months (6) (372)
Greater than 12 months (265) (189)
Total (271) (561)
Recorded an Allowance for Credit Losses    
Fair Value    
Less than 12 months 2 2
Greater than 12 months 0 0
Total 2 2
Gross Unrealized Depreciation    
Less than 12 months (1) 0
Greater than 12 months 0 0
Total $ (1) $ 0