EMPLOYEE BENEFIT PLANS - Change in Benefit Obligation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, beginning of year	$ 132	$ 129
Interest cost	6	6	$ 93
Actuarial (gains) losses	14	2
Benefits paid	(6)	(5)
Projected Benefit Obligation	146	132
Transfer to AXA Financial	0	0
Projected Benefit Obligation, End of Year	146	132	129
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Pension plan assets at fair value, beginning of year	87	86
Actual return on plan assets	14	4
Contributions	4	0
Benefits paid and fees	(4)	(3)
Pension plan assets at fair value, end of year	101	87	$ 86
Excess of PBO Over Pension Plan Assets	(45)	(45)
Transfer to AXA Financial	0	0
Excess of PBO Over Pension Plan Assets, end of year	(45)	(45)
Amounts included in AOCI not yet recognized as components of net periodic pension costs
Unrecognized net actuarial (gain) loss	55	51
Unrecognized prior service cost (credit)	1	1
Total	$ 56	$ 52