INVESTMENTS - Information Regarding Pretax Net Gains and Losses From Investments (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Gain (Loss) on Securities [Line Items]
Total net investment gains (losses)	$ (511)	$ 423	$ 555	$ 123	$ (521)	$ 199	$ 564	$ 122	$ 590	$ 363	$ 468
Credit Losses
Fixed maturity securities available for sale									0	0	38
Fixed maturity securities held to maturity									1	0	1
Commercial mortgage and other loans									(146)	(18)	6
Impairment losses									0	(25)	(20)
Loan commitments									9	9	4
Reinsurance recoverables and other									(3)	(2)	(2)
Total credit losses									(139)	(36)	27
Derivatives and Other
Derivative gains (losses)									(531)	(1,151)	(805)
Foreign currency gains (losses)									972	1,424	1,069
Fixed maturity securities
Gain (Loss) on Securities [Line Items]
Gross gains from sales									24	93	64
Gross losses from sales									(61)	(78)	(52)
Foreign currency gains (losses) on sales and redemptions									204	442	1
Other investments
Gain (Loss) on Securities [Line Items]
Gross gains (losses) from sales and redemptions									33	10	0
Equity securities
Gain (Loss) on Securities [Line Items]
Total net investment gains (losses)									88	(341)	164
Debt securities, financing receivables, and other investments
Gain (Loss) on Securities [Line Items]
Total net investment gains (losses)									200	467	13
Derivatives and other
Gain (Loss) on Securities [Line Items]
Total net investment gains (losses)									$ 441	$ 273	$ 264