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INVESTMENTS - Summary of Fixed Maturity Securities by Contractual Maturity (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Amortized Cost
Due in one year or less	$ 1,692	$ 1,331
Due after one year through five years	8,587	8,131
Due after five years through ten years	4,734	4,636
Due after ten years	1,866	1,454
Amortized Cost	27,305	24,191
Fair Value
Due in one year or less	1,636	1,314
Due after one year through five years	7,984	7,546
Due after five years through ten years	4,134	4,057
Due after ten years	1,601	1,233
Fair Value	25,159	22,236
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	797	848
Fair Value
Due in one year or less	5	5
Due after one year through five years	62	61
Due after five years through ten years	41	41
Due after ten years	62	65
Fair Value	766	821
Asset-backed Securities
Amortized Cost
Amortized Cost	5,326	4,229
Fair Value
Fair Value	5,272	4,063
Amortized Cost
Amortized Cost	602	661
Fair Value
Fair Value	581	642
Commercial
Amortized Cost
Amortized Cost	1,143	1,023
Fair Value
Fair Value	1,019	919
Amortized Cost
Amortized Cost	15	7
Fair Value
Fair Value	15	7
Agency Residential
Amortized Cost
Amortized Cost	3,739	3,382
Fair Value
Fair Value	3,305	3,099
Non-agency Residential
Amortized Cost
Amortized Cost	218	5
Fair Value
Fair Value	$ 209	$ 4

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