EMPLOYEE BENEFIT PLANS - Change in Benefit Obligation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, beginning of year	$ 2,657	$ 2,463
Service cost	0	0
Interest cost	93	107	$ 99
Actuarial (gains) losses	(6)	264
Benefits paid	(169)	(177)
Plan amendments and curtailments	1	0
Projected Benefit Obligation	2,576	2,657
Transfer to AXA Financial	(2,447)	0
Projected Benefit Obligation, End of Year	129	2,657	2,463
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Pension plan assets at fair value, beginning of year	2,473	2,401
Actual return on plan assets	24	250
Contributions	0	6
Benefits paid and fees	(175)	(184)
Pension plan assets at fair value, end of year	2,322	2,473	$ 2,401
PBO, immediately preceding the Transfer to AXA Financial	2,576	2,657
Excess of PBO Over Pension Plan Assets, immediately preceding the Transfer to AXA Financial	(254)	(184)
Transfer to AXA Financial	211	0
Excess of PBO Over Pension Plan Assets, end of year	(43)	(184)
Amounts included in AOCI not yet recognized as components of net periodic pension costs
Unrecognized net actuarial (gain) loss	49	1,144
Unrecognized prior service cost (credit)	1	0
Total	$ 50	$ 1,144