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Marketable and Other Securities - Fair Value of Cash Equivalents and Marketable Debt Securities (Details) - USD ($) $ in Millions | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Summary of Investment Holdings [Line Items] |  |
Total available-for-sale debt securities with contractual maturities | $ 15,594 |
Total cash and cash equivalents | 23,744 | $ 18,853
Cash and cash equivalents | 275 | 277
Total restricted cash | 2,971 | 3,064
Due in one year or less | 9,824 |
Due between one and five years | 5,770 |
Total available-for-sale debt securities with contractual maturities | 15,594 |
Cash and cash equivalents |  |
Summary of Investment Holdings [Line Items] |  |
Cash and time deposits | 12,296 | 8,977
Total available-for-sale debt securities with contractual maturities | 7,901 | 2,384
Total available-for-sale debt securities with contractual maturities | 7,901 | 2,384
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 | 76 | 211
Total available-for-sale debt securities with contractual maturities | 76 | 211
Cash and cash equivalents | Level 2 | Corporate debt |  |
Summary of Investment Holdings [Line Items] |  |
Total available-for-sale debt securities with contractual maturities | 5,160 | 1,439
Total available-for-sale debt securities with contractual maturities | 5,160 | 1,439
Cash and cash equivalents | Level 2 | Sovereign debt |  |
Summary of Investment Holdings [Line Items] |  |
Total available-for-sale debt securities with contractual maturities | 2,665 | 734
Total available-for-sale debt securities with contractual maturities | 2,665 | 734
Cash and cash equivalents | Level 1 |  |
Summary of Investment Holdings [Line Items] |  |
Money market funds | 3,547 | 7,491
Marketable debt securities |  |
Summary of Investment Holdings [Line Items] |  |
Total available-for-sale debt securities with contractual maturities | 8,477 | 7,613
Total available-for-sale debt securities with contractual maturities | 8,477 | 7,613
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 | 3,477 | 3,495
Total available-for-sale debt securities with contractual maturities | 3,477 | 3,495
Marketable debt securities | Level 2 | Mortgage and asset-backed |  |
Summary of Investment Holdings [Line Items] |  |
Total available-for-sale debt securities with contractual maturities | 636 | 589
Total available-for-sale debt securities with contractual maturities | 636 | 589
Marketable debt securities | Level 2 | Corporate debt and other |  |
Summary of Investment Holdings [Line Items] |  |
Total available-for-sale debt securities with contractual maturities | 4,364 | 3,529
Total available-for-sale debt securities with contractual maturities | 4,364 | 3,529
Other Current Assets | Level 1 |  |
Summary of Investment Holdings [Line Items] |  |
Money market funds | $ 2,695 | $ 2,787

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