INVESTMENTS - Summary of Amortized Cost and Fair Value of Fixed Maturity Securities, by Contractual Maturity (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Amortized Cost
Due in one year or less	$ 830	$ 581
Due after one year through five years	3,673	3,684
Due after five years through ten years	2,007	2,003
Due after ten years	1,404	958
Amortized Cost	15,141	13,699
Fair Value
Due in one year or less	799	563
Due after one year through five years	3,429	3,429
Due after five years through ten years	1,809	1,760
Due after ten years	1,273	827
Fair Value	14,202	12,671
Amortized Cost
Due in one year or less	5	5
Due after one year through five years	64	63
Due after five years through ten years	44	43
Due after ten years	68	68
Amortized Cost	796	820
Fair Value
Due in one year or less	5	5
Due after one year through five years	61	61
Due after five years through ten years	41	41
Due after ten years	65	65
Fair Value	771	793
Asset Backed Securities
Amortized Cost
Amortized Cost	4,783	4,111
Fair Value
Fair Value	4,676	3,951
Amortized Cost
Amortized Cost	603	634
Fair Value
Fair Value	585	614
Commercial
Amortized Cost
Amortized Cost	567	569
Fair Value
Fair Value	503	509
Amortized Cost
Amortized Cost	14	7
Fair Value
Fair Value	13	7
Agency residential
Amortized Cost
Amortized Cost	1,817	1,792
Fair Value
Fair Value	1,654	1,628
Non-agency residential
Amortized Cost
Amortized Cost	60	3
Fair Value
Fair Value	$ 59	$ 3