DERIVATIVE INSTRUMENTS - Gains (Losses) Recognized on Fair Value Hedging Relationships (Details) - Fixed maturities - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Foreign currency forwards
Derivative Instruments, Gain (Loss) [Line Items]
Total gains (losses) recognized for derivatives	$ 1,156	$ (267)	$ 2,013	$ (230)
Gains (losses) on derivatives excluded from effectiveness testing	(48)	(17)	(92)	(32)
Gains (losses) on derivatives included in effectiveness testing	1,204	(250)	2,105	(198)
Gains (losses) recognized for hedged items	(1,236)	244	(2,118)	205
Ineffectiveness recognized for fair value hedge	(32)	(6)	(13)	7
Foreign currency options
Derivative Instruments, Gain (Loss) [Line Items]
Total gains (losses) recognized for derivatives	7	(5)	6	(3)
Gains (losses) on derivatives excluded from effectiveness testing	7	1	6	4
Gains (losses) on derivatives included in effectiveness testing	0	(6)	0	(7)
Gains (losses) recognized for hedged items	0	6	0	7
Ineffectiveness recognized for fair value hedge	$ 0	0	$ 0	0
Interest rate swaptions
Derivative Instruments, Gain (Loss) [Line Items]
Total gains (losses) recognized for derivatives		(4)		(95)
Gains (losses) on derivatives excluded from effectiveness testing		0		19
Gains (losses) on derivatives included in effectiveness testing		(4)		(114)
Gains (losses) recognized for hedged items		5		99
Ineffectiveness recognized for fair value hedge		$ 1		$ (15)