DERIVATIVE INSTRUMENTS - Gains (Losses) Recognized on Fair Value Hedging Relationships (Details) - Fixed Maturities - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Foreign currency forwards
Derivative Instruments, Gain (Loss) [Line Items]
Total gains (losses) recognized for derivatives	$ 247	$ (1,094)	$ 17	$ (631)
Gains (losses) on derivatives excluded from effectiveness testing	(28)	(1)	(60)	(36)
Gains (losses) on derivatives included in effectiveness testing	275	(1,093)	77	(595)
Gains (losses) recognized for hedged items	(267)	1,097	(62)	624
Ineffectiveness recognized for fair value hedge	8	4	15	29
Foreign currency options
Derivative Instruments, Gain (Loss) [Line Items]
Total gains (losses) recognized for derivatives	(1)	(9)	(4)	(8)
Gains (losses) on derivatives excluded from effectiveness testing	(1)	(9)	3	(8)
Gains (losses) on derivatives included in effectiveness testing	0	0	(7)	0
Gains (losses) recognized for hedged items	0	0	7	0
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		(34)	(95)	(160)
Gains (losses) on derivatives excluded from effectiveness testing		2	19	(20)
Gains (losses) on derivatives included in effectiveness testing		(36)	(114)	(140)
Gains (losses) recognized for hedged items		37	99	150
Ineffectiveness recognized for fair value hedge		$ 1	$ (15)	$ 10