EMPLOYEE BENEFIT PLANS - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Expenses associated with plans	$ 21	$ 60	$ 27
Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Expenses associated with plans	47	70	37
AXA Equitable 401(k) Plan
Defined Benefit Plan Disclosure [Line Items]
Expenses associated with plans	$ 22	$ 19	$ 15