v3.26.1
Annuity Reinsurance - Rollforward of Liability for Future Policy Benefit (Details) - USD ($)
$ in Millions
3 Months Ended 5 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2026
Jun. 30, 2025
Jan. 21, 2026
Dec. 31, 2025
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]              
Interest accrual $ 8 $ 0   $ 15 $ 0    
Future policy benefits for annuity reinsurance contracts 484   $ 484 484     $ 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           (1)  
Effect of actual variances from expected experience           1  
Ending balance at original discount rate 461   461 461   $ 470  
Interest accrual 6   9 10      
Benefit payments     (12)        
Foreign exchange remeasurement     (6)        
Effect of changes in discount rate assumptions 11   11 11      
Future policy benefits for annuity reinsurance contracts $ 450   $ 450 $ 450      
Weighted-average liability duration (in years) 10 years   10 years 10 years      
Weighted-average original discount rate 5.90%   5.90% 5.90%      
Weighted-average current discount rate 6.10%   6.10% 6.10%      
Expected future benefit payments, undiscounted $ 987   $ 987 $ 987      
Expected future benefit payments, discounted $ 450   $ 450 $ 450