v3.26.1
Financial Instruments - Schedule of Unrealized Loss Position (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]    
Gross unrealized losses, less than 12 months $ (13) $ (1)
Estimate fair value, less than 12 months 3,753 931
Gross unrealized losses, 12 months or more (3) (3)
Estimated fair value, 12 months or more 264 283
Gross unrealized losses, total (16) (4)
Estimated fair value, total 4,017 1,214
U.S. treasury bills    
Debt Securities, Available-for-sale [Line Items]    
Gross unrealized losses, less than 12 months (1) 0
Estimate fair value, less than 12 months 669 111
Gross unrealized losses, 12 months or more 0 0
Estimated fair value, 12 months or more 0 0
Gross unrealized losses, total (1) 0
Estimated fair value, total 669 111
U.S. treasury notes    
Debt Securities, Available-for-sale [Line Items]    
Gross unrealized losses, less than 12 months (6) (1)
Estimate fair value, less than 12 months 1,519 176
Gross unrealized losses, 12 months or more (3) (2)
Estimated fair value, 12 months or more 236 235
Gross unrealized losses, total (9) (3)
Estimated fair value, total 1,755 411
Corporate debt securities    
Debt Securities, Available-for-sale [Line Items]    
Gross unrealized losses, less than 12 months (6) 0
Estimate fair value, less than 12 months 1,510 608
Gross unrealized losses, 12 months or more 0 (1)
Estimated fair value, 12 months or more 28 40
Gross unrealized losses, total (6) (1)
Estimated fair value, total 1,538 648
Government debt securities    
Debt Securities, Available-for-sale [Line Items]    
Gross unrealized losses, less than 12 months 0 0
Estimate fair value, less than 12 months 55 36
Gross unrealized losses, 12 months or more 0 0
Estimated fair value, 12 months or more 0 8
Gross unrealized losses, total 0 0
Estimated fair value, total $ 55 $ 44