INVESTMENTS - Contractual and Economic Maturities of Investments in Fixed Maturities (Detail) - USD ($) $ in Millions		Mar. 31, 2024		Dec. 31, 2023
Available for sale:
Due in one year or less	[1]	$ 1,272
Due after one year through five years	[1]	6,659
Due after five years through 10 years	[1]	17,904
Due after 10 years	[1]	38,590
Mortgage- and asset-backed securities	[1]	3,169
Total fixed maturity securities, available-for-sale, amortized cost	[1]	67,594
Held to maturity:
Due in one year or less	[1]	0
Due after one year through five years	[1]	35
Due after five years through 10 years	[1]	8,901
Due after 10 years	[1]	7,753
Total fixed maturity securities, held-to- maturity, amortized cost		16,689	[1]	$ 17,819
Available for sale:
Due in one year or less		1,292
Due after one year through five years		7,480
Due after five years through 10 years		19,556
Due after 10 years		38,417
Mortgage- and asset-backed securities		3,385
Fair Value		70,130		73,290
Held to maturity:
Due in one year or less		0
Due after one year through five years		36
Due after five years through 10 years		9,714
Due after 10 years		8,495
Fair Value		$ 18,245		$ 19,657

[1] Net of allowance for credit losses