INVESTMENTS - Information Regarding Pretax Realized Gains and Losses From Investments (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Gain (Loss) on Investments [Line Items]
Other-than-temporary impairment losses realized		$ (10)	$ (14)
Derivative gains (losses)		(52)	(4)
Foreign currency gains (losses)		(71)	(43)
Total realized investment gains (losses)		(140)	30
Derivatives and other
Gain (Loss) on Investments [Line Items]
Total realized investment gains (losses)		(123)	(47)
Fixed maturities
Gain (Loss) on Investments [Line Items]
Total realized investment gains (losses)		(36)	69
Perpetual securities
Gain (Loss) on Investments [Line Items]
Total realized investment gains (losses)		0	8
Equity securities
Gain (Loss) on Investments [Line Items]
Net gains (losses) from redemptions(1)		25	0
Other-than-temporary impairment losses realized		(6)	0
Total realized investment gains (losses)		19	0
Available-for-sale securities | Fixed maturities
Gain (Loss) on Investments [Line Items]
Gross gains from sales		12	2
Gross losses from sales(1)	[1]	(15)	(4)
Net gains (losses) from redemptions(1)	[1]	(29)	83
Other-than-temporary impairment losses realized	[1]	(4)	(12)
Available-for-sale securities | Perpetual securities
Gain (Loss) on Investments [Line Items]
Net gains (losses) from redemptions(1)		0	10	[1]
Other-than-temporary impairment losses realized		$ 0	$ (2)	[1]

[1] Primarily driven by foreign exchange