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RELATED PARTY TRANSACTIONS (Details) - USD ($)
$ in Millions
12 Months Ended
May 14, 2021
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Related Party Transaction [Line Items]        
Dividend of AB Units to parent       $ 61
Line of credit facility, outstanding balance   $ 0    
Related Party        
Related Party Transaction [Line Items]        
Agreement costs paid   24 $ 22  
Related Party | Alliance Bernstein        
Related Party Transaction [Line Items]        
Dividend of AB Units to parent $ 61      
Affiliated Entity        
Related Party Transaction [Line Items]        
Other receivables   $ 17 12  
EQ AZ Life Re | Related Party        
Related Party Transaction [Line Items]        
Reinsurance, quota, percentage   90.00%    
EQ AZ Life Re | Affiliated Entity        
Related Party Transaction [Line Items]        
Ceded premiums   $ 9 8 7
Equitable Financial Services, LLC | Related Party        
Related Party Transaction [Line Items]        
Operating costs and expenses   121 116 132
Equitable Network, LLC | Related Party        
Related Party Transaction [Line Items]        
Operating costs and expenses   303 138 136
Equitable Distributors, LLC | Related Party        
Related Party Transaction [Line Items]        
Operating costs and expenses   332 82 59
Alliance Bernstein | Related Party        
Related Party Transaction [Line Items]        
Operating costs and expenses   5 3 $ 2
Equitable Holdings Inc | Related Party | Letter of Credit        
Related Party Transaction [Line Items]        
Line of credit facility, outstanding balance   $ 45 $ 45  
Equitable Holdings Inc | Affiliated Entity        
Related Party Transaction [Line Items]        
Related party transaction percentage   3.00%