v3.26.3
Long-duration Contracts - Market Risk Benefits (Details) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Market Risk Benefit [Roll Forward]        
Balance, beginning of period, before changes in instrument-specific credit risk $ 4,716 $ 3,715    
Effect of changes in instrument-specific credit risk 155 289 $ 260 $ 157
Beginning Balance 4,456 3,558    
Issuances 291 346    
Interest accrual 156 143    
Attributed fees collected 324 289    
Benefit payments (76) (51)    
Effect of changes in interest rates (840) 116    
Effect of changes in equity (45) (106)    
Effect of actual policyholder behavior compared to expected behavior 81 83    
Balance at September 30, 2026 4,497 4,612    
Less: Reinsurance recoverable 73 69    
Balance at September 30, 2026, net of reinsurance 4,424 4,543    
Ending Balance 4,342 4,323    
Effect of changes in future expected policyholder behavior 30 (43)    
Effect of changes in other future expected assumptions (35) (12)    
Indexed annuities        
Market Risk Benefit [Roll Forward]        
Balance, beginning of period, before changes in instrument-specific credit risk 4,511 3,525    
Effect of changes in instrument-specific credit risk 152 284 255 154
Beginning Balance 4,256 3,371    
Issuances 291 346    
Interest accrual 150 136    
Attributed fees collected 323 288    
Benefit payments (73) (48)    
Effect of changes in interest rates (821) 109    
Effect of changes in equity (45) (106)    
Effect of actual policyholder behavior compared to expected behavior 79 81    
Balance at September 30, 2026 4,313 4,408    
Less: Reinsurance recoverable 73 69    
Balance at September 30, 2026, net of reinsurance 4,240 4,339    
Ending Balance 4,161 4,124    
Net amount at risk $ 18,595 $ 17,195    
Weighted-average attained age of contract holders (in years) 69 years 69 years    
Effect of changes in future expected policyholder behavior $ 36 $ (38)    
Effect of changes in other future expected assumptions (35) (15)    
Traditional deferred annuities        
Market Risk Benefit [Roll Forward]        
Balance, beginning of period, before changes in instrument-specific credit risk 205 190    
Effect of changes in instrument-specific credit risk 3 5 $ 5 $ 3
Beginning Balance 200 187    
Issuances 0 0    
Interest accrual 6 7    
Attributed fees collected 1 1    
Benefit payments (3) (3)    
Effect of changes in interest rates (19) 7    
Effect of changes in equity 0 0    
Effect of actual policyholder behavior compared to expected behavior 2 2    
Balance at September 30, 2026 184 204    
Less: Reinsurance recoverable 0 0    
Balance at September 30, 2026, net of reinsurance 184 204    
Ending Balance 181 199    
Net amount at risk $ 421 $ 423    
Weighted-average attained age of contract holders (in years) 77 years 76 years    
Effect of changes in future expected policyholder behavior $ (6) $ (5)    
Effect of changes in other future expected assumptions $ 0 $ 3