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INSURANCE GROUP STATUTORY FINANCIAL INFORMATION - Narrative (Details)
 3 Months Ended 12 Months Ended
Dec. 31, 2022
USD ($)
prescribedAndPermittedPractice
Dec. 31, 2022
USD ($)
prescribedAndPermittedPractice
Sep. 30, 2022
Sep. 30, 2021
USD ($)
Related Party Transaction [Line Items]        
Number of prescribed and permitted practices | prescribedAndPermittedPractice 3 3    
Statement of Statutory Accounting Principles 108        
Related Party Transaction [Line Items]        
Statutory accounting practices, statutory surplus, increase $ 86,000,000 $ 86,000,000    
Statutory accounting practices, statutory net income, decrease $ 1,300,000,000 $ 1,400,000,000    
Statutory accounting practices, hedging losses amortization period   5 years    
Statutory accounting practices, statutory unassigned surplus, balance       $ 0
Regulation Number 213        
Related Party Transaction [Line Items]        
Statutory accounting practices, statutory surplus, increase (decrease) to new standard application   $ (1,900,000,000)    
Statutory accounting practices, total asset required, percentage     100.00%  
Statutory accounting practices, statutory net income, increase (decrease) to new standard application   (700,000,000)    
Regulation Number 213 with Seperate Accounts        
Related Party Transaction [Line Items]        
Statutory accounting practices, statutory surplus, increase (decrease) to new standard application   2,200,000,000    
Statutory accounting practices, statutory net income, increase (decrease) to new standard application   $ 2,300,000,000