v3.26.1
Investments - Schedule of Debt Securities - Amortized Cost, Gross Unrealized Gains and Losses, Fair Value and Allowance for Debt Securities Maturities (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Amortized Cost    
Due in 1 year or less $ 1,794  
Due after 1 year through 5 years 14,271  
Due after 5 years through 10 years 13,927  
Due after 10 years through 20 years 9,633  
Due after 20 years 7,439  
Amortized Cost 55,707 $ 53,961
Allowance for Credit Loss    
Due in 1 year or less 0  
Due after 1 year through 5 years 0  
Due after 5 years through 10 years 0  
Due after 10 years through 20 years 6  
Due after 20 years 0  
Allowance for Credit Loss 17 11
Gross Unrealized Gains    
Due in 1 year or less 2  
Due after 1 year through 5 years 92  
Due after 5 years through 10 years 144  
Due after 10 years through 20 years 48  
Due after 20 years 8  
Gross Unrealized Gains 337 592
Gross Unrealized Losses    
Due in 1 year or less 6  
Due after 1 year through 5 years 394  
Due after 5 years through 10 years 384  
Due after 10 years through 20 years 1,430  
Due after 20 years 1,638  
Gross Unrealized Losses 4,079 3,751
Fair Value    
Due in 1 year or less 1,790  
Due after 1 year through 5 years 13,969  
Due after 5 years through 10 years 13,687  
Due after 10 years through 20 years 8,245  
Due after 20 years 5,809  
Debt securities 51,948 50,791
Residential mortgage-backed    
Amortized Cost    
Without single maturity 473  
Amortized Cost 473 445
Allowance for Credit Loss    
Without single maturity 1  
Allowance for Credit Loss 1 4
Gross Unrealized Gains    
Without single maturity 21  
Gross Unrealized Gains 21 24
Gross Unrealized Losses    
Without single maturity 26  
Gross Unrealized Losses 26 23
Fair Value    
Without single maturity 467  
Debt securities 467 442
Commercial mortgage-backed    
Amortized Cost    
Without single maturity 2,010  
Amortized Cost 2,010 1,873
Allowance for Credit Loss    
Without single maturity 0  
Allowance for Credit Loss 0 0
Gross Unrealized Gains    
Without single maturity 5  
Gross Unrealized Gains 5 10
Gross Unrealized Losses    
Without single maturity 61  
Gross Unrealized Losses 61 54
Fair Value    
Without single maturity 1,954  
Debt securities 1,954 1,829
Other asset-backed securities    
Amortized Cost    
Without single maturity 6,160  
Amortized Cost 6,160 5,491
Allowance for Credit Loss    
Without single maturity 10  
Allowance for Credit Loss 10 7
Gross Unrealized Gains    
Without single maturity 17  
Gross Unrealized Gains 17 34
Gross Unrealized Losses    
Without single maturity 140  
Gross Unrealized Losses 140 130
Fair Value    
Without single maturity 6,027  
Debt securities $ 6,027 $ 5,388