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INVESTMENTS - Schedule of Amortized Cost and Fair Value of Fixed Maturity Securities, by Contractual Maturity (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Fixed maturity securities - available for sale
Due in one year or less, Amortized Cost	$ 1,289	$ 1,331
Due after one year through five years, Amortized Cost	7,094	8,131
Due after five years through ten years, Amortized Cost	5,613	4,636
Due after ten years, Amortized Cost	2,537	1,454
Amortized Cost	28,568	24,191
Due in one year or less, Fair Value	1,261	1,314
Due after one year through five years, Fair Value	6,858	7,546
Due after five years through ten years, Fair Value	5,405	4,057
Due after ten years, Fair Value	2,460	1,233
Fixed maturities - available for sale (amortized cost: 2023, $0; 2022, $0)	27,740	22,236
Fixed maturity securities - held to maturity
Due in one year or less, Amortized Cost	5	5
Due after one year through five years, Amortized Cost	59	63
Due after five years through ten years, Amortized Cost	43	43
Due after ten years, Amortized Cost	127	68
Amortized Cost	864	848
Due in one year or less, Fair Value	5	5
Due after one year through five years, Fair Value	58	61
Due after five years through ten years, Fair Value	42	41
Due after ten years, Fair Value	131	65
Fair Value	854	821
Asset-backed securities
Fixed maturity securities - available for sale
Amortized Cost	5,644	4,229
Fixed maturities - available for sale (amortized cost: 2023, $0; 2022, $0)	5,618	4,063
Fixed maturity securities - held to maturity
Amortized Cost	609	661
Fair Value	597	642
Commercial
Fixed maturity securities - available for sale
Amortized Cost	1,091	1,023
Fixed maturities - available for sale (amortized cost: 2023, $0; 2022, $0)	1,000	919
Fixed maturity securities - held to maturity
Amortized Cost	21	7
Fair Value	21	7
Agency residential
Fixed maturity securities - available for sale
Amortized Cost	4,869	3,382
Fixed maturities - available for sale (amortized cost: 2023, $0; 2022, $0)	4,695	3,099
Non-agency residential
Fixed maturity securities - available for sale
Amortized Cost	431	5
Fixed maturities - available for sale (amortized cost: 2023, $0; 2022, $0)	$ 443	$ 4

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