INVESTMENTS - Information Regarding Pretax Net Gains and Losses From Investments (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Gain (Loss) on Securities [Line Items]
Gross gains (losses) from sales and redemptions	$ 5	$ 0
Net investment gains (losses)	951	123
Credit losses:
Fixed maturity securities held-to-maturity	0	1
Commercial mortgage and other loans	(7)	(31)
Impairment losses	0	0
Loan commitments	1	3
Reinsurance recoverables and other	5	(3)
Total credit losses	(1)	(30)
Derivatives and other:
Derivative gains (losses)	(215)	17
Foreign currency gains (losses)	918	82
Fixed maturity securities
Gain (Loss) on Securities [Line Items]
Gross gains from sales	34	1
Gross losses from sales	(282)	(3)
Foreign currency gains (losses)	416	59
Debt Securities, Financing Receivables, and Other Investments
Gain (Loss) on Securities [Line Items]
Net investment gains (losses)	173	57
Equity securities
Gain (Loss) on Securities [Line Items]
Net investment gains (losses)	76	(3)
Derivatives and other
Gain (Loss) on Securities [Line Items]
Net investment gains (losses)	$ 703	$ 99