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ORGANIZATION - Narrative (Details)
shares in Millions
 12 Months Ended
Nov. 01, 2022
USD ($)
shares
Oct. 03, 2022
USD ($)
Jul. 01, 2022
USD ($)
shares
Jun. 01, 2021
USD ($)
Dec. 31, 2022
USD ($)
segment
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Organization Basis Of Presentation [Line Items]              
Assets         $ 252,702,000,000 $ 295,688,000,000  
Number of reportable segments | segment         6    
AB units fair value           $ 293,000,000 $ 494,000,000
Massachusetts Domiciled Insurance Company              
Organization Basis Of Presentation [Line Items]              
Guaranteed credit rate (as a percent)   3.00%          
Guaranteed credit amount of general account assets   $ 4,000,000,000          
Reinsurance, guaranteed credit amount of separate account assets   5,000,000,000          
Number of Employees, Total | Reinsurance Transaction              
Organization Basis Of Presentation [Line Items]              
Deferred variable annuity   $ 360,000          
Number of Employees, Total | Reinsurance Transaction | Massachusetts Domiciled Insurance Company              
Organization Basis Of Presentation [Line Items]              
Concentration risk, percentage   50.00%          
Corporate Solutions Life Reinsurance Company (CS Life)              
Organization Basis Of Presentation [Line Items]              
Ownership percentage acquired       100.00%      
Alliance Bernstein (AB)              
Organization Basis Of Presentation [Line Items]              
Economic interest         61.00% 65.00%  
AB units issued (in shares) | shares 12.1   3.2        
AB units fair value $ 456,000,000   $ 133,000,000        
Contingent payment arrangements         $ 229,000,000    
Performance obligation period         6 years    
Alliance Bernstein (AB) | Corporate Solutions Life Reinsurance Company (CS Life)              
Organization Basis Of Presentation [Line Items]              
Assets   $ 2,800,000,000   $ 9,500,000,000      
Direct insurance liabilities ceded   $ 4,100,000,000   9,600,000,000      
Fair value       5,300,000,000      
Separate account, liability, ceded       16,900,000,000      
Alliance Bernstein (AB) | Corporate Solutions Life Reinsurance Company (CS Life) | GMxB derivative features’ liability              
Organization Basis Of Presentation [Line Items]              
Fair value       1,200,000,000      
Separate account, liability, ceded       5,300,000,000      
Alliance Bernstein (AB) | CarVal              
Organization Basis Of Presentation [Line Items]              
Ownership percentage acquired         100.00%    
Venerable Insurance and Annuity Company (VAIC) | Equitable Financial Life Insurance Company (EFLIC)              
Organization Basis Of Presentation [Line Items]              
Surplus notes       60,000,000      
Venerable Insurance and Annuity Company (VAIC) | Corporate Solutions Life Reinsurance Company (CS Life)              
Organization Basis Of Presentation [Line Items]              
Business combination, consideration transferred       $ 215,000,000      
Equitable Investment Management Group, LLC (EIMG) | VA Capital Company LLC              
Organization Basis Of Presentation [Line Items]              
Ownership percentage acquired       9.09%