v3.25.2
Investments - Scheduled maturities of available for sale fixed maturities (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Fair Value, Fiscal Year Maturity [Abstract]    
Available for sale (AFS) fixed maturities $ 10,489 $ 10,398
Fair Value Percent, Fiscal Year Maturity [Abstract]    
Average life of ABS 3 years  
Average life of MBS 6 years  
Fixed maturities    
Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
One year or less $ 749  
After one year through five years 2,516  
After five years through ten years 1,299  
After ten years 222  
Fixed maturities amortized cost, Subtotal 4,786  
Amortized cost 10,617  
Fair Value, Fiscal Year Maturity [Abstract]    
One year or less 735  
After one year through five years 2,514  
After five years through ten years 1,320  
After ten years 209  
Fixed maturities fair value, subtotal 4,778  
Available for sale (AFS) fixed maturities $ 10,489 $ 10,398
Fair Value Percent, Fiscal Year Maturity [Abstract]    
One year or less 7.00%  
After one year through five years 24.00%  
After five years through ten years 13.00%  
After ten years 2.00%  
Fixed maturities fair value, subtotal, percent 46.00%  
Fair value, total, percent 100.00%  
Collateralized loan obligations and other asset backed securities    
Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Fixed maturities without single maturity date $ 3,518  
Fair Value, Fiscal Year Maturity [Abstract]    
Fixed maturities without single maturity date $ 3,494  
Fair Value Percent, Fiscal Year Maturity [Abstract]    
Fixed maturities without single maturity date 33.00%  
Mortgage-backed securities    
Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Fixed maturities without single maturity date $ 2,313  
Fair Value, Fiscal Year Maturity [Abstract]    
Fixed maturities without single maturity date $ 2,217  
Fair Value Percent, Fiscal Year Maturity [Abstract]    
Fixed maturities without single maturity date 21.00%