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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

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