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Other Policyholder Funds and Benefits Payable (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Liabilities for Guarantees on Long-Duration Contracts [Line Items]        
Policyholder Account Balance $ 614 $ 638 $ 658  
Universal Life        
Liabilities for Guarantees on Long-Duration Contracts [Line Items]        
Policyholder Account Balance 206 223 232 $ 253
Policyholder Account Balance, Premium Received 13 14 15  
Policyholder Account Balance, Policy Charge (23) (21) (23)  
Policyholder Account Balance, Surrender and Withdrawal (5) (6) (4)  
Policyholder Account Balance, Benefit Payment (9) (6) (20)  
Policyholder Account Balance, Interest Expense $ 7 $ 10 $ 11  
Policyholder Account Balance, Weighted Average Crediting Rate 4.30% 4.20% 4.20%  
Policyholder Account Balance, Net Amount at Risk $ 824 $ 917 $ 987  
Policyholder Account Balance, Cash Surrender Value $ 205 221 229  
Universal Life | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 to 0499 | Minimum [Member]        
Liabilities for Guarantees on Long-Duration Contracts [Line Items]        
Policyholder Account Balance, Guaranteed Minimum Credit Rating 4.00%      
Universal Life | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 to 0499 | Maximum        
Liabilities for Guarantees on Long-Duration Contracts [Line Items]        
Policyholder Account Balance, Guaranteed Minimum Credit Rating 5.00%      
Universal Life | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 to 0499 | Policyholder Account Balance, at Guaranteed Minimum Crediting Rate        
Liabilities for Guarantees on Long-Duration Contracts [Line Items]        
Policyholder Account Balance $ 205 222 230  
Short-Duration Insurance, Other [Member]        
Liabilities for Guarantees on Long-Duration Contracts [Line Items]        
Policyholder Account Balance $ 408 $ 415 $ 426