v3.26.3
Investments - Schedule of Debt Securities - Amortized Cost, Gross Unrealized Gains and Losses, Fair Value and Allowance for Debt Securities Maturities (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Amortized Cost    
Due in 1 year or less $ 3,930  
Due after 1 year through 5 years 15,501  
Due after 5 years through 10 years 15,198  
Due after 10 years through 20 years 10,143  
Due after 20 years 7,835  
Amortized Cost 63,389 $ 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 0  
Due after 20 years 0  
Allowance for Credit Loss 4 11
Gross Unrealized Gains    
Due in 1 year or less 1  
Due after 1 year through 5 years 17  
Due after 5 years through 10 years 21  
Due after 10 years through 20 years 17  
Due after 20 years 1  
Gross Unrealized Gains 81 592
Gross Unrealized Losses    
Due in 1 year or less 13  
Due after 1 year through 5 years 634  
Due after 5 years through 10 years 893  
Due after 10 years through 20 years 1,946  
Due after 20 years 2,001  
Gross Unrealized Losses 5,856 3,751
Fair Value    
Due in 1 year or less 3,918  
Due after 1 year through 5 years 14,884  
Due after 5 years through 10 years 14,326  
Due after 10 years through 20 years 8,214  
Due after 20 years 5,835  
Debt securities 57,610 50,791
Residential mortgage-backed    
Amortized Cost    
Without single maturity 485  
Amortized Cost 485 445
Allowance for Credit Loss    
Without single maturity 1  
Allowance for Credit Loss 1 4
Gross Unrealized Gains    
Without single maturity 18  
Gross Unrealized Gains 18 24
Gross Unrealized Losses    
Without single maturity 47  
Gross Unrealized Losses 47 23
Fair Value    
Without single maturity 455  
Debt securities 455 442
Commercial mortgage-backed    
Amortized Cost    
Without single maturity 2,074  
Amortized Cost 2,074 1,873
Allowance for Credit Loss    
Without single maturity 1  
Allowance for Credit Loss 1 0
Gross Unrealized Gains    
Without single maturity 1  
Gross Unrealized Gains 1 10
Gross Unrealized Losses    
Without single maturity 88  
Gross Unrealized Losses 88 54
Fair Value    
Without single maturity 1,986  
Debt securities 1,986 1,829
Other asset-backed securities    
Amortized Cost    
Without single maturity 8,223  
Amortized Cost 8,223 5,491
Allowance for Credit Loss    
Without single maturity 2  
Allowance for Credit Loss 2 7
Gross Unrealized Gains    
Without single maturity 5  
Gross Unrealized Gains 5 34
Gross Unrealized Losses    
Without single maturity 234  
Gross Unrealized Losses 234 130
Fair Value    
Without single maturity 7,992  
Debt securities $ 7,992 $ 5,388