v3.26.1
Financial Instruments - Fair Values on Recurring Basis (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Schedule of Investments [Line Items]      
Cash and time deposits $ 14,655   $ 16,145
Debt Securities, Available-for-sale      
Gross Unrealized Gains 18    
Gross Unrealized Losses (58)    
Total Estimated Fair Value 42,200   45,800
Cash, Cash Equivalents, and Marketable Securities      
Cash, cash equivalents and marketable securities 145,965   126,325
Cash, cash equivalents and marketable securities, amortized cost 143,204    
Less: Restricted cash, cash equivalents, and marketable securities (2,876)   (3,296)
Total cash, cash equivalents, and marketable securities 143,089   123,029
Equity Securities, FV-NI, Gain (Loss)      
Equity securities, unrealized gain (loss) (883) $ (205)  
Level 1 securities      
Schedule of Investments [Line Items]      
Money market funds 35,697   29,777
Equity securities 2,801   3,687
Level 1 securities | Money market funds      
Schedule of Investments [Line Items]      
Money market funds 35,697    
Level 2 securities | U.S. government and agency securities      
Debt Securities, Available-for-sale      
Cost or Amortized Cost 4,601    
Gross Unrealized Gains 2    
Gross Unrealized Losses (18)    
Total Estimated Fair Value 4,585   5,222
Level 2 securities | Corporate debt securities      
Debt Securities, Available-for-sale      
Cost or Amortized Cost 86,511    
Gross Unrealized Gains 13    
Gross Unrealized Losses (29)    
Total Estimated Fair Value 86,495   69,585
Level 2 securities | Asset-backed securities      
Debt Securities, Available-for-sale      
Cost or Amortized Cost 1,711    
Gross Unrealized Gains 3    
Gross Unrealized Losses (11)    
Total Estimated Fair Value 1,703   1,780
Level 2 securities | Other financial instruments      
Debt Securities, Available-for-sale      
Cost or Amortized Cost 29    
Gross Unrealized Gains 0    
Gross Unrealized Losses 0    
Total Estimated Fair Value $ 29   $ 129