INVESTMENTS - Information Regarding Pretax Realized Gains and Losses From Investments (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Gain (Loss) on Securities [Line Items]
Loan loss reserves	$ (2)	$ (3)	$ (4)	$ (10)
Derivative gains (losses)	122	(172)	122	(28)
Foreign currency gains (losses)	(200)	192	(202)	(36)
Total realized investment gains (losses)	(66)	3	5	(131)
Loan receivables
Gain (Loss) on Securities [Line Items]
Total realized investment gains (losses)	(2)	(3)	(4)	(10)
Derivatives and other
Gain (Loss) on Securities [Line Items]
Total realized investment gains (losses)	(78)	20	(80)	(64)
Equity securities
Gain (Loss) on Securities [Line Items]
Total realized investment gains (losses)	(11)	18	47	(28)
Available-for-sale securities \| Fixed maturities
Gain (Loss) on Securities [Line Items]
Gross gains from sales	32	12	44	22
Gross losses from sales	(3)	(71)	(11)	(73)
Foreign currency gains (losses) on sales and redemptions	(4)	29	9	24
Other-than-temporary impairment losses realized	0	(2)	0	(2)
Total realized investment gains (losses)	$ 25	$ (32)	$ 42	$ (29)

Foreign currency translation gains (losses) on remeasurement of monetary assets

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Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.

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Amount of other-than-temporary impairment (OTTI) on investment in debt security, recognized in earnings.

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