INVESTMENTS - Contractual and Economic Maturities of Investments in Fixed Maturities (Detail) - USD ($) $ in Millions		Sep. 30, 2025		Dec. 31, 2024
Available-for-sale:
Due in one year or less	[1]	$ 1,596
Due after one year through five years	[1]	8,083
Due after five years through 10 years	[1]	16,873
Due after 10 years	[1]	37,448
Mortgage- and asset-backed securities	[1]	4,271
Total fixed maturity securities, available-for-sale, amortized cost	[1]	68,271
Held-to-maturity:
Due in one year or less	[1]	34
Due after one year through five years	[1]	144
Due after five years through 10 years	[1]	8,901
Due after 10 years	[1]	7,876
Total fixed maturity securities, held-to-maturity, amortized cost		16,955	[1]	$ 15,966
Available-for-sale:
Due in one year or less		1,702
Due after one year through five years		8,902
Due after five years through 10 years		17,769
Due after 10 years		34,541
Mortgage- and asset-backed securities		4,362
Total fixed maturity securities, available-for-sale, fair value		67,276		65,269
Held-to-maturity:
Due in one year or less		34
Due after one year through five years		148
Due after five years through 10 years		9,133
Due after 10 years		7,455
Total fixed maturity securities, held-to-maturity, fair value		$ 16,770		$ 16,772

[1] Net of allowance for credit losses