INVESTMENTS - Contractual and Economic Maturities of Investments in Fixed Maturities (Detail) - USD ($) $ in Millions		Dec. 31, 2021		Dec. 31, 2020
Available for sale:
Due in one year or less	[1]	$ 984
Due after one year through five years	[1]	8,145
Due after five years through 10 years	[1]	13,288
Due after 10 years	[1]	61,755
Mortgage- and asset-backed securities	[1]	1,197
Total fixed maturity securities available for sale	[1]	85,369
Held to maturity:
Due in one year or less	[1]	0
Due after one year through five years	[1]	44
Due after five years through 10 years	[1]	10,121
Due after 10 years	[1]	11,835
Mortgage- and asset-backed securities	[1]	0
Total fixed maturity securities held to maturity		22,000	[1]	$ 24,464
Available for sale:
Due in one year or less		1,015
Due after one year through five years		8,782
Due after five years through 10 years		15,491
Due after 10 years		72,163
Mortgage- and asset-backed securities		1,245
Available for sale, fixed maturity securities		98,696		105,882
Held to maturity:
Due in one year or less		0
Due after one year through five years		48
Due after five years through 10 years		11,772
Due after 10 years		15,049
Mortgage- and asset-backed securities		0
Held to maturity, fixed maturity securities, fair value		$ 26,869		$ 30,399

[1] Net of allowance for credit losses