v3.26.3
Investments in Debt and Equity Securities - Schedule of Cost Basis and Fair Value of Available-for-Sale Securities (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Schedule of Investments in Debt and Equity Securities    
Cost Basis $ 4,102 $ 3,535
Unrealized Pretax Net Gains (Losses) (108) 14
Fair Value 3,994 3,549
U.S. treasury bonds    
Schedule of Investments in Debt and Equity Securities    
Cost Basis 9 10
Unrealized Pretax Net Gains (Losses) 0 0
Fair Value 9 10
Other U.S. and non-U.S. government bonds    
Schedule of Investments in Debt and Equity Securities    
Cost Basis 59 72
Unrealized Pretax Net Gains (Losses) 0 2
Fair Value 59 74
Corporate bonds and other debt securities    
Schedule of Investments in Debt and Equity Securities    
Cost Basis 2,921 2,457
Unrealized Pretax Net Gains (Losses) (51) 23
Fair Value 2,870 2,480
Asset-backed securities    
Schedule of Investments in Debt and Equity Securities    
Cost Basis 320 273
Unrealized Pretax Net Gains (Losses) (1) 0
Fair Value 319 273
U.S. governmental agency    
Schedule of Investments in Debt and Equity Securities    
Cost Basis 632 580
Unrealized Pretax Net Gains (Losses) (49) (8)
Fair Value 583 572
Residential    
Schedule of Investments in Debt and Equity Securities    
Cost Basis 4 2
Unrealized Pretax Net Gains (Losses) 0 (1)
Fair Value 4 1
Commercial    
Schedule of Investments in Debt and Equity Securities    
Cost Basis 157 141
Unrealized Pretax Net Gains (Losses) (7) (2)
Fair Value $ 150 $ 139