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INSURANCE GROUP STATUTORY FINANCIAL INFORMATION - Narrative (Details) - USD ($)
shares in Millions, $ in Millions
12 Months Ended
May 14, 2021
Apr. 13, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Related Party Transaction [Line Items]          
Statutory net income (loss)     $ (44) $ (20) $ (30)
Statutory surplus, capital stock and asset valuation reserve     338 $ 457  
Securities on deposit with such government or state agencies     7    
Alliance Bernstein          
Related Party Transaction [Line Items]          
Dividend shares (in units)   2.6      
Return of capital $ 61        
Revolving Credit Facility | Holdings Revolving Credit Facility | EQ AZ Life Re          
Related Party Transaction [Line Items]          
Line of credit facility, maximum borrowing capacity     $ 45