v3.25.4
Marketable and Other Securities - Fair Value of Cash Equivalents and Marketable Securities (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Summary of Investment Holdings [Line Items]    
Total available-for-sale debt securities with contractual maturities $ 10,839  
Total cash and cash equivalents 20,945 $ 19,872
Cash and cash equivalents 357 294
Total restricted cash 3,339 3,092
Due in one year or less 5,863  
Due between one and five years 4,976  
Total available-for-sale debt securities with contractual maturities 10,839  
Cash and cash equivalents    
Summary of Investment Holdings [Line Items]    
Cash and time deposits 10,884 12,471
Total available-for-sale debt securities with contractual maturities 4,691 2,351
Total available-for-sale debt securities with contractual maturities 4,691 2,351
Cash and cash equivalents | Level 2 | U.S. government and agencies    
Summary of Investment Holdings [Line Items]    
Total available-for-sale debt securities with contractual maturities 451 26
Total available-for-sale debt securities with contractual maturities 451 26
Cash and cash equivalents | Level 2 | Corporate debt    
Summary of Investment Holdings [Line Items]    
Total available-for-sale debt securities with contractual maturities 3,317 1,541
Total available-for-sale debt securities with contractual maturities 3,317 1,541
Cash and cash equivalents | Level 2 | Sovereign debt    
Summary of Investment Holdings [Line Items]    
Total available-for-sale debt securities with contractual maturities 923 785
Total available-for-sale debt securities with contractual maturities 923 785
Cash and cash equivalents | Level 1    
Summary of Investment Holdings [Line Items]    
Money market funds 5,369 5,050
Marketable debt securities    
Summary of Investment Holdings [Line Items]    
Total available-for-sale debt securities with contractual maturities 6,724 7,265
Total available-for-sale debt securities with contractual maturities 6,724 7,265
Marketable debt securities | Level 2 | U.S. government and agencies    
Summary of Investment Holdings [Line Items]    
Total available-for-sale debt securities with contractual maturities 2,370 3,082
Total available-for-sale debt securities with contractual maturities 2,370 3,082
Marketable debt securities | Level 2 | Corporate Debt And Other Securities    
Summary of Investment Holdings [Line Items]    
Total available-for-sale debt securities with contractual maturities 3,796 3,592
Total available-for-sale debt securities with contractual maturities 3,796 3,592
Marketable debt securities | Level 2 | Mortgage and asset-backed    
Summary of Investment Holdings [Line Items]    
Total available-for-sale debt securities with contractual maturities 558 591
Total available-for-sale debt securities with contractual maturities 558 591
Restricted cash - cash equivalents | Level 1    
Summary of Investment Holdings [Line Items]    
Money market funds $ 2,981 $ 2,798