INVESTMENTS - Information Regarding Pretax Realized Gains and Losses From Investments (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Gain (Loss) on Securities [Line Items]
Loan loss reserves	[1]	$ 0	$ (2)
Credit Losses
Fixed maturity securities available for sale		(63)	0
Fixed maturity securities held to maturity		1	0
Commercial mortgage and other loans		(37)	0
Loan commitments		(46)	0
Total credit losses		(145)	0
Total net investment gains (losses)		(463)	71
Derivatives and Other
Derivative gains (losses)		(85)	0
Foreign currency gains (losses)		(77)	(2)
Derivatives and other
Credit Losses
Total net investment gains (losses)		(162)	(2)
Equity securities
Credit Losses
Total net investment gains (losses)		(149)	58
Available-for-sale securities | Fixed maturity securities
Gain (Loss) on Securities [Line Items]
Gross gains from sales		7	12
Gross losses from sales		0	(8)
Foreign currency gains (losses) on sales and redemptions		(14)	13
Credit Losses
Total net investment gains (losses)		$ (7)	$ 17

[1] U.S. GAAP guidance adopted as of January 1, 2020 has superseded these losses, included for comparative purposes only.