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Separate Account Balances and Changes (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Separate Account, Liability [Roll Forward]      
Balance, beginning of period $ 925    
Balance, end of period 952 $ 925  
Universal Life      
Separate Account, Liability [Roll Forward]      
Balance, beginning of period 925 892 $ 959
Interest credited before policy charges 42 42 38
Change in unrealized gains and losses impacting separate account liabilities 0 0 (85)
Benefit payments (6) (10) (15)
Other (9) 1 (5)
Balance, end of period 952 925 892
Cash surrender value $ 948 $ 917 $ 890