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Marketable and Other Securities - Fair Value of Cash Equivalents and Marketable Securities (Details) - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Summary of Investment Holdings [Line Items]    
Total available-for-sale debt securities with contractual maturities $ 11,778  
Total cash and cash equivalents 17,635 $ 18,853
Cash and cash equivalents 293 277
Total restricted cash 3,743 3,064
Due in one year or less 6,137  
Due between one and five years 5,641  
Total available-for-sale debt securities with contractual maturities 11,778  
Cash and cash equivalents    
Summary of Investment Holdings [Line Items]    
Cash and time deposits 10,105 8,977
Total available-for-sale debt securities with contractual maturities 4,685 2,384
Total available-for-sale debt securities with contractual maturities 4,685 2,384
Cash and cash equivalents | Level 1    
Summary of Investment Holdings [Line Items]    
Money market funds 2,844 7,491
Marketable debt securities    
Summary of Investment Holdings [Line Items]    
Total available-for-sale debt securities with contractual maturities 7,845 7,613
Total available-for-sale debt securities with contractual maturities 7,845 7,613
Other Current Assets | Level 1    
Summary of Investment Holdings [Line Items]    
Money market funds 3,450 2,787
U.S. government and agencies | Cash and cash equivalents | Level 2    
Summary of Investment Holdings [Line Items]    
Total available-for-sale debt securities with contractual maturities 849 211
Total available-for-sale debt securities with contractual maturities 849 211
U.S. government and agencies | Marketable debt securities | Level 2    
Summary of Investment Holdings [Line Items]    
Total available-for-sale debt securities with contractual maturities 3,459 3,495
Total available-for-sale debt securities with contractual maturities 3,459 3,495
Corporate debt | Cash and cash equivalents | Level 2    
Summary of Investment Holdings [Line Items]    
Total available-for-sale debt securities with contractual maturities 2,997 1,439
Total available-for-sale debt securities with contractual maturities 2,997 1,439
Mortgage and asset-backed | Marketable debt securities | Level 2    
Summary of Investment Holdings [Line Items]    
Total available-for-sale debt securities with contractual maturities 578 589
Total available-for-sale debt securities with contractual maturities 578 589
Sovereign debt | Cash and cash equivalents | Level 2    
Summary of Investment Holdings [Line Items]    
Total available-for-sale debt securities with contractual maturities 840 734
Total available-for-sale debt securities with contractual maturities 840 734
Corporate debt and other | Marketable debt securities | Level 2    
Summary of Investment Holdings [Line Items]    
Total available-for-sale debt securities with contractual maturities 3,808 3,529
Total available-for-sale debt securities with contractual maturities $ 3,808 $ 3,529