v3.25.1
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
Mar. 31, 2025
Dec. 31, 2024
Unrealized Losses    
Less Than 12 Months $ (35) $ (84)
12 Months or More (531) (643)
Fair Value    
Fair Value, Less Than 12 Months 3,588 5,195
Fair Value, 12 Months or More 8,256 8,734
U.S. Treasury securities and obligations of U.S. government corporations and agencies    
Unrealized Losses    
Less Than 12 Months 0 (1)
12 Months or More (2) (3)
Fair Value    
Fair Value, Less Than 12 Months 83 60
Fair Value, 12 Months or More 99 144
Corporate securities    
Unrealized Losses    
Less Than 12 Months (17) (41)
12 Months or More (258) (319)
Fair Value    
Fair Value, Less Than 12 Months 1,783 2,621
Fair Value, 12 Months or More 4,443 4,782
Municipal securities    
Unrealized Losses    
Less Than 12 Months (9) (16)
12 Months or More (116) (135)
Fair Value    
Fair Value, Less Than 12 Months 790 1,217
Fair Value, 12 Months or More 2,075 2,073
Asset-backed securities    
Unrealized Losses    
Less Than 12 Months (1) (4)
12 Months or More (14) (17)
Fair Value    
Fair Value, Less Than 12 Months 258 301
Fair Value, 12 Months or More 286 331
Residential mortgage-backed securities    
Unrealized Losses    
Less Than 12 Months (6) (18)
12 Months or More (93) (111)
Fair Value    
Fair Value, Less Than 12 Months 426 786
Fair Value, 12 Months or More 729 738
Commercial mortgage-backed securities    
Unrealized Losses    
Less Than 12 Months (2) (4)
12 Months or More (48) (58)
Fair Value    
Fair Value, Less Than 12 Months 248 210
Fair Value, 12 Months or More $ 624 $ 666