COMMITMENTS AND CONTINGENT LIABILITIES - Narrative (Details) - USD ($) shares in Millions, $ in Millions	1 Months Ended	6 Months Ended
	Apr. 30, 2019	Jun. 30, 2020	Feb. 29, 2016
Loss Contingencies [Line Items]
Unaccrued amounts of reasonably possible range of losses		$ 100
Federal home loan bank stock		313
Carrying value of collateral pledged for federal home loan bank		8,600
Credit facility
Loss Contingencies [Line Items]
Line of credit facility, maximum borrowing capacity		17
Holdings Revolving Credit Facility | Credit facility
Loss Contingencies [Line Items]
Line of credit facility, maximum borrowing capacity		$ 2,500
Debt instrument, term		5 years
Letter of Credit | Credit facility
Loss Contingencies [Line Items]
Line of credit facility, maximum borrowing capacity		$ 1,500
Bilateral Letter Of Credit Facilities | Credit facility
Loss Contingencies [Line Items]
Line of credit facility, maximum borrowing capacity		1,900
ACS Life | Letter of Credit | Credit facility
Loss Contingencies [Line Items]
Remaining capacity at termination		150
AXA Equitable Life | Letter of Credit | Credit facility
Loss Contingencies [Line Items]
Remaining capacity at termination		620
AXA
Loss Contingencies [Line Items]
Commitments by the Company to provide equity financing		1,300
Face amount of mortgage loans		481
Affiliated Entity | AXA
Loss Contingencies [Line Items]
Commitments by the Company to provide equity financing		$ 226
Brach Family Foundation Litigation
Loss Contingencies [Line Items]
Liability for future policy benefits, face value of policy			$ 1
Pre-Capitalized Trust Securities, Redeemable February 15, 2049
Loss Contingencies [Line Items]
Shares issued (in shares)	0.6
Proceeds from offering	$ 600
Sale of stock, semi-annual facility fee, rate	2.125%
Pre-Capitalized Trust Securities, Redeemable February 15, 2029
Loss Contingencies [Line Items]
Shares issued (in shares)	0.4
Proceeds from offering	$ 400
Sale of stock, semi-annual facility fee, rate	2.715%