v3.26.3
Short-term and Long-term Investments, Restricted Deposits - Schedule of Fair Value of Available-For-Sale Investments with Gross Unrealized Losses by Investment Type and Length of Time (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Unrealized Losses    
Less Than 12 Months $ (352) $ (5)
12 Months or More (342) (320)
Fair Value    
Fair Value, Less Than 12 Months 11,316 1,183
Fair Value, 12 Months or More 4,024 6,166
U.S. Treasury securities and obligations of U.S. government corporations and agencies    
Unrealized Losses    
Less Than 12 Months (9) 0
12 Months or More 0 (1)
Fair Value    
Fair Value, Less Than 12 Months 493 88
Fair Value, 12 Months or More 14 43
Corporate securities    
Unrealized Losses    
Less Than 12 Months (198) (2)
12 Months or More (148) (144)
Fair Value    
Fair Value, Less Than 12 Months 6,660 464
Fair Value, 12 Months or More 2,156 3,226
Municipal securities    
Unrealized Losses    
Less Than 12 Months (60) (1)
12 Months or More (72) (68)
Fair Value    
Fair Value, Less Than 12 Months 1,808 241
Fair Value, 12 Months or More 984 1,550
Asset-backed securities    
Unrealized Losses    
Less Than 12 Months (13) (2)
12 Months or More (11) (8)
Fair Value    
Fair Value, Less Than 12 Months 835 114
Fair Value, 12 Months or More 107 180
Residential mortgage-backed securities    
Unrealized Losses    
Less Than 12 Months (59) 0
12 Months or More (83) (70)
Fair Value    
Fair Value, Less Than 12 Months 1,070 120
Fair Value, 12 Months or More 428 687
Commercial mortgage-backed securities    
Unrealized Losses    
Less Than 12 Months (13) 0
12 Months or More (28) (29)
Fair Value    
Fair Value, Less Than 12 Months 450 156
Fair Value, 12 Months or More $ 335 $ 480