v3.25.0.1
Investments - Unrealized Loss Position Maturities (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Fair Value    
Less than one year $ 420  
One year through five years 5,582  
After five years through ten years 2,767  
Greater than ten years 2,298  
Fair Value 13,240 $ 12,548
Unrealized Losses    
Less than one year 4  
One year through five years 152  
After five years through ten years 144  
Greater than ten years 279  
Unrealized Losses 707 836
Residential mortgage-backed securities    
Fair Value    
Debt securities, maturity, without single maturity date, fair value 609  
Fair Value 609 614
Unrealized Losses    
Debt securities, maturity, without single maturity date, unrealized losses 54  
Unrealized Losses 54 60
Commercial mortgage-backed securities    
Fair Value    
Debt securities, maturity, without single maturity date, fair value 1,092  
Fair Value 1,092 675
Unrealized Losses    
Debt securities, maturity, without single maturity date, unrealized losses 67  
Unrealized Losses 67 100
Other asset-backed securities    
Fair Value    
Debt securities, maturity, without single maturity date, fair value 472  
Fair Value 472 1,316
Unrealized Losses    
Debt securities, maturity, without single maturity date, unrealized losses 7  
Unrealized Losses 7 $ 18
Supporting experience- rated products    
Fair Value    
Less than one year 0  
One year through five years 120  
After five years through ten years 86  
Greater than ten years 166  
Fair Value 396  
Unrealized Losses    
Less than one year 0  
One year through five years 3  
After five years through ten years 6  
Greater than ten years 20  
Unrealized Losses 30  
Supporting experience- rated products | Residential mortgage-backed securities    
Fair Value    
Debt securities, maturity, without single maturity date, fair value 6  
Unrealized Losses    
Debt securities, maturity, without single maturity date, unrealized losses 0  
Supporting experience- rated products | Commercial mortgage-backed securities    
Fair Value    
Debt securities, maturity, without single maturity date, fair value 6  
Unrealized Losses    
Debt securities, maturity, without single maturity date, unrealized losses 1  
Supporting experience- rated products | Other asset-backed securities    
Fair Value    
Debt securities, maturity, without single maturity date, fair value 12  
Unrealized Losses    
Debt securities, maturity, without single maturity date, unrealized losses 0  
Supporting remaining products    
Fair Value    
Less than one year 420  
One year through five years 5,462  
After five years through ten years 2,681  
Greater than ten years 2,132  
Fair Value 12,844  
Unrealized Losses    
Less than one year 4  
One year through five years 149  
After five years through ten years 138  
Greater than ten years 259  
Unrealized Losses 677  
Supporting remaining products | Residential mortgage-backed securities    
Fair Value    
Debt securities, maturity, without single maturity date, fair value 603  
Unrealized Losses    
Debt securities, maturity, without single maturity date, unrealized losses 54  
Supporting remaining products | Commercial mortgage-backed securities    
Fair Value    
Debt securities, maturity, without single maturity date, fair value 1,086  
Unrealized Losses    
Debt securities, maturity, without single maturity date, unrealized losses 66  
Supporting remaining products | Other asset-backed securities    
Fair Value    
Debt securities, maturity, without single maturity date, fair value 460  
Unrealized Losses    
Debt securities, maturity, without single maturity date, unrealized losses $ 7