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Reserve for Future Policy Benefits (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Liability      
Reserve for future policy benefits $ 561 $ 596 $ 638
Annuitization Benefit      
Liability      
Reserve for future policy benefits 561 596 $ 638
Liability for Future Policy Benefits, Period Increase (Decrease) 102 61  
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment (119) (94)  
Liability for Future Policy Benefits, Other Increase (Decrease) (18) (9)  
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance $ 29 $ 22