v3.26.3
Derivatives - CDS Spread and Components of Credit Derivative Assets (Liabilities) (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Sep. 30, 2025
Dec. 31, 2024
Credit Derivatives        
Fair value of credit derivatives before effect of AG credit spread $ (32) $ (40)    
Plus: Effect of AG credit spread 18 25    
Net fair value of credit derivatives $ (14) $ (15)    
Five-year CDS spread | AGC        
Credit Derivatives        
Quoted price of CDS contract (as a percent) 0.68% 0.69% 0.70% 0.75%
One-year CDS spread | AGC        
Credit Derivatives        
Quoted price of CDS contract (as a percent) 0.23% 0.23% 0.24% 0.25%