v3.26.3
Annuity Reinsurance - Rollforward of Liability for Future Policy Benefit (Details) - USD ($)
$ in Millions
3 Months Ended 8 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2026
Sep. 30, 2025
Jan. 21, 2026
Dec. 31, 2025
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]              
Interest accrual $ 10 $ 0   $ 25 $ 0    
Future policy benefits for annuity reinsurance contracts 459   $ 459 459     $ 0
Annuity Reinsurance              
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]              
Assured Life Re Acquisition, January 21, 2026           $ 470  
Effect of changes in cash flow assumptions           4  
Effect of actual variances from expected experience           1  
Ending balance at original discount rate 466   466 466   $ 475  
Interest accrual 5   14 15      
Benefit payments     (18)        
Foreign exchange remeasurement     (5)        
Effect of changes in discount rate assumptions (35)   (35) (35)      
Future policy benefits for annuity reinsurance contracts $ 431   $ 431 $ 431      
Weighted-average liability duration (in years) 9 years 6 months   9 years 6 months 9 years 6 months      
Weighted-average original discount rate 5.80%   5.80% 5.80%      
Weighted-average current discount rate 6.70%   6.70% 6.70%      
Expected future benefit payments, undiscounted $ 980   $ 980 $ 980      
Expected future benefit payments, discounted $ 431   $ 431 $ 431