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Adoption of Accounting Pronouncement - Market Risk Benefits by Asset and Liability Positions (Details) - USD ($)
$ in Millions
Jun. 30, 2023
Dec. 31, 2022
Jun. 30, 2022
Jan. 01, 2022
Market Risk Benefit [Line Items]        
Asset $ 433   $ 489  
Liability 3,195 $ 2,970 3,163  
Net liability (2,762) (2,855) (2,674)  
Reported        
Market Risk Benefit [Line Items]        
Asset       $ 366
Liability   0   4,813
Net liability       4,447
Traditional deferred annuities        
Market Risk Benefit [Line Items]        
Asset 0   0  
Liability 179   181  
Net liability (179) (183) (181)  
Traditional deferred annuities | Reported        
Market Risk Benefit [Line Items]        
Asset       0
Liability       253
Net liability       253
Indexed annuities        
Market Risk Benefit [Line Items]        
Asset 433   489  
Liability 3,016   2,982  
Net liability $ (2,583) $ (2,672) $ (2,493)  
Indexed annuities | Reported        
Market Risk Benefit [Line Items]        
Asset       366
Liability       4,560
Net liability       $ 4,194