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INVESTMENTS - Schedule of Amortized Cost and Fair Value of Fixed Maturity Securities, by Contractual Maturity (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Amortized Cost
Due in one year or less	$ 1,487	$ 1,289
Due after one year through five years	7,144	7,094
Due after five years through ten years	6,235	5,613
Due after ten years	2,569	2,537
Amortized Cost	29,311	28,568
Fair Value
Due in one year or less	1,454	1,261
Due after one year through five years	6,858	6,858
Due after five years through ten years	5,959	5,405
Due after ten years	2,483	2,460
Fair Value	28,297	27,740
Amortized Cost
Due in one year or less	10	5
Due after one year through five years	54	59
Due after five years through ten years	43	43
Due after ten years	152	127
Amortized Cost	849	864
Fair Value
Due in one year or less	10	5
Due after one year through five years	54	58
Due after five years through ten years	41	42
Due after ten years	157	131
Fair Value	842	854
Asset-backed Securities
Amortized Cost
Amortized Cost	5,310	5,644
Fair Value
Fair Value	5,305	5,618
Amortized Cost
Amortized Cost	569	609
Fair Value
Fair Value	559	597
Commercial
Amortized Cost
Amortized Cost	1,064	1,091
Fair Value
Fair Value	981	1,000
Amortized Cost
Amortized Cost	21	21
Fair Value
Fair Value	21	21
Agency Residential
Amortized Cost
Amortized Cost	4,835	4,869
Fair Value
Fair Value	4,585	4,695
Non-agency Residential
Amortized Cost
Amortized Cost	668	431
Fair Value
Fair Value	$ 672	$ 443

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