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INVESTMENTS - Information Regarding Pretax Net Gains and Losses From Investments (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Gain (Loss) on Securities [Line Items]
Gross gains (losses) from sales and redemptions	$ 1	$ (3)	$ 13	$ 7
Net investment gains (losses)	275	(1,408)	(1,109)	239
Real estate owned impairments	0	0	(6)	0
Credit losses:
Commercial mortgage and other loans	(51)	(85)	(165)	(113)
Impairment losses	0	(55)	0	(55)
Loan commitments	(2)	(1)	(2)	2
Reinsurance recoverables and other	0	0	1	5
Total credit losses	(53)	(141)	(166)	(161)
Derivatives and other:
Derivative gains (losses)	(123)	436	(145)	(54)
Foreign currency gains (losses)	408	(1,821)	(910)	21
Fixed maturity securities
Gain (Loss) on Securities [Line Items]
Gross gains from sales	29	1	148	41
Gross losses from sales	(96)	(66)	(429)	(375)
Foreign currency gains (losses)	99	173	339	660
Debt securities and other investments
Gain (Loss) on Securities [Line Items]
Net investment gains (losses)	33	105	71	333
Equity securities
Gain (Loss) on Securities [Line Items]
Net investment gains (losses)	10	13	47	100
Derivatives and other
Gain (Loss) on Securities [Line Items]
Net investment gains (losses)	$ 285	$ (1,385)	$ (1,055)	$ (33)

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