INVESTMENTS - Information Regarding Pretax Net Gains and Losses From Investments (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Gain (Loss) on Securities [Line Items]
Loan loss reserves	[1]	$ 0	$ 0	$ (18)
Total net investment gains (losses)		468	(270)	(135)
Credit Losses
Fixed maturity securities available for sale		38	(38)	0
Fixed maturity securities held to maturity		1	1	0
Commercial mortgage and other loans		6	(93)	0
Impairment losses	[2]	(20)	(49)	(13)
Loan commitments		4	(21)	0
Reinsurance recoverables and other		(2)	0	0
Total credit losses		27	(200)	(13)
Derivatives and Other
Derivative gains (losses)		(805)	399	(174)
Foreign currency gains (losses)		1,069	(568)	(62)
Derivatives and other
Gain (Loss) on Securities [Line Items]
Total net investment gains (losses)		264	(169)	(236)
Fixed maturity securities
Gain (Loss) on Securities [Line Items]
Gross gains from sales		64	31	115
Gross losses from sales		(52)	(47)	(68)
Foreign currency gains (losses) on sales and redemptions		1	(69)	(16)
Total net investment gains (losses)		13	(85)	31
Equity securities
Gain (Loss) on Securities [Line Items]
Total net investment gains (losses)		$ 164	$ 184	$ 101

[1] U.S. GAAP guidance adopted as of January 1, 2020 has superseded these losses, included for comparative purposes only

[2] Includes OTTI losses in 2019