INVESTMENTS - Information Regarding Pretax Net Gains and Losses From Investments (Detail) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Gain (Loss) on Securities [Line Items]
Net investment gains (losses)	$ 123	$ 122
Credit Losses
Fixed maturity securities held to maturity	1	0
Commercial mortgage and other loans	(31)	16
Loan commitments	3	7
Reinsurance recoverable and other	(3)	2
Total credit losses	(30)	25
Derivatives and Other
Derivative gains (losses)	17	(466)
Foreign currency gains (losses)	82	633
Derivatives and other
Gain (Loss) on Securities [Line Items]
Net investment gains (losses)	99	167
Fixed maturity securities
Gain (Loss) on Securities [Line Items]
Gross gains from sales	1	70
Gross losses from sales	(3)	(3)
Foreign currency gains (losses) on sales and redemptions	59	10
Net investment gains (losses)	57	86
Other investments
Gain (Loss) on Securities [Line Items]
Gross gains from sales	0	9
Equity securities
Gain (Loss) on Securities [Line Items]
Net investment gains (losses)	$ (3)	$ (156)

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