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Future Policy Benefits - Liability For Future Policy Benefit Expected Future Policy Benefit Undiscounted (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Traditional life    
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted [Abstract]    
Expected future benefit payments $ 2,705 $ 2,935
Expected future gross premiums 914 1,082
Liability For Future Policy Benefit, Expected Future Policy Benefit, Discounted [Abstract]    
Expected future benefit payments 1,948 2,075
Expected future gross premiums 681 789
Immediate annuities    
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted [Abstract]    
Expected future benefit payments 3,189 3,291
Expected future gross premiums 0 0
Liability For Future Policy Benefit, Expected Future Policy Benefit, Discounted [Abstract]    
Expected future benefit payments 1,297 1,413
Expected future gross premiums 0 0
PRT    
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted [Abstract]    
Expected future benefit payments 10,038 6,709
Expected future gross premiums 0 0
Liability For Future Policy Benefit, Expected Future Policy Benefit, Discounted [Abstract]    
Expected future benefit payments 6,054 4,350
Expected future gross premiums $ 0 $ 0