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Marketable and Other Securities - Fair Value of Cash Equivalents and Marketable Securities (Details) - USD ($)
$ in Millions
Sep. 30, 2023
Dec. 31, 2022
Summary of Investment Holdings [Line Items]    
Total available-for-sale debt securities with contractual maturities $ 19,907  
Total cash and cash equivalents 25,224 $ 19,153
Cash and cash equivalents 316 341
Total restricted cash 3,754 2,796
Due in one year or less 14,426  
Due between one and five years 5,482  
Total available-for-sale debt securities with contractual maturities 19,907  
Cruise    
Summary of Investment Holdings [Line Items]    
Total cash and cash equivalents 1,500 1,500
Cash and cash equivalents    
Summary of Investment Holdings [Line Items]    
Cash and time deposits 9,813 8,921
Total available-for-sale debt securities with contractual maturities 11,029 5,618
Total available-for-sale debt securities with contractual maturities 11,029 5,618
Cash and cash equivalents | Level 1    
Summary of Investment Holdings [Line Items]    
Money market funds 4,382 4,613
Marketable debt securities    
Summary of Investment Holdings [Line Items]    
Total available-for-sale debt securities with contractual maturities 9,651 12,150
Total available-for-sale debt securities with contractual maturities 9,651 12,150
Marketable debt securities | Cruise    
Summary of Investment Holdings [Line Items]    
Total available-for-sale debt securities with contractual maturities 192 1,400
Total available-for-sale debt securities with contractual maturities 192 1,400
Other Current Assets | Level 1    
Summary of Investment Holdings [Line Items]    
Money market funds 3,438 2,455
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 2,191 1,012
Total available-for-sale debt securities with contractual maturities 2,191 1,012
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 3,767 4,357
Total available-for-sale debt securities with contractual maturities 3,767 4,357
Corporate debt | Cash and cash equivalents | Level 2    
Summary of Investment Holdings [Line Items]    
Total available-for-sale debt securities with contractual maturities 5,962 2,778
Total available-for-sale debt securities with contractual maturities 5,962 2,778
Corporate debt | Marketable debt securities | Level 2    
Summary of Investment Holdings [Line Items]    
Total available-for-sale debt securities with contractual maturities 3,890 5,147
Total available-for-sale debt securities with contractual maturities 3,890 5,147
Mortgage and asset-backed | Marketable debt securities | Level 2    
Summary of Investment Holdings [Line Items]    
Total available-for-sale debt securities with contractual maturities 617 538
Total available-for-sale debt securities with contractual maturities 617 538
Sovereign debt | Cash and cash equivalents | Level 2    
Summary of Investment Holdings [Line Items]    
Total available-for-sale debt securities with contractual maturities 2,876 1,828
Total available-for-sale debt securities with contractual maturities 2,876 1,828
Sovereign debt | Marketable debt securities | Level 2    
Summary of Investment Holdings [Line Items]    
Total available-for-sale debt securities with contractual maturities 1,376 2,108
Total available-for-sale debt securities with contractual maturities $ 1,376 $ 2,108