v3.26.1
Investments - Schedule of Gross Unrealized Losses by Unrealized Loss Position and Credit Quality (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Investment grade fixed income securities    
Investments [Line Items]    
Fixed income securities with unrealized loss position less than 20% of amortized cost, net $ (458)  
Fixed income securities with unrealized loss position greater than or equal to 20% of amortized cost, net (22)  
Total unrealized losses (480) $ (352)
Below investment grade fixed income securities    
Investments [Line Items]    
Fixed income securities with unrealized loss position less than 20% of amortized cost, net (54)  
Fixed income securities with unrealized loss position greater than or equal to 20% of amortized cost, net (4)  
Total unrealized losses (58) (40)
Fixed income securities    
Investments [Line Items]    
Fixed income securities with unrealized loss position less than 20% of amortized cost, net (512)  
Fixed income securities with unrealized loss position greater than or equal to 20% of amortized cost, net (26)  
Total unrealized losses $ (538) $ (392)