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Fair Value Measurements - Cash, Cash Equivalents and Marketable Securities (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
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Debt Securities, Available-for-sale [Abstract] |  |
Available-for-sale Securities - Estimated Fair Value | $ 9,346 | $ 8,874
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 25,473 | 21,859
Marketable securities | 745 | $ 1,068
Total cash, cash equivalents and current marketable securities, Carrying Amount | 26,216 |
Total cash, cash equivalents and current marketable securities, Unrealized Gain | 2 |
Total cash, cash equivalents and current marketable securities, Estimated Fair Value | 26,218 |
Held-to-maturity Securities |  |
Debt Securities, Held-to-maturity [Abstract] |  |
Held-to-maturity Securities - Carrying Amount | 16,872 |
Held-to-maturity Securities, Unrecognized Gain | 0 |
Held-to-maturity Securities - Estimated Fair Value | 16,872 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 16,758 |
Marketable securities | 114 |
Held-to-maturity Securities | Cash |  |
Debt Securities, Held-to-maturity [Abstract] |  |
Held-to-maturity Securities - Carrying Amount | 3,410 |
Held-to-maturity Securities, Unrecognized Gain | 0 |
Held-to-maturity Securities - Estimated Fair Value | 3,410 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 3,410 |
Marketable securities | 0 |
Held-to-maturity Securities | U.S. Gov't securities |  |
Debt Securities, Held-to-maturity [Abstract] |  |
Held-to-maturity Securities - Carrying Amount | 96 |
Held-to-maturity Securities, Unrecognized Gain | 0 |
Held-to-maturity Securities - Estimated Fair Value | 96 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 96 |
Marketable securities | 0 |
Held-to-maturity Securities | Non-U.S. sovereign securities |  |
Debt Securities, Held-to-maturity [Abstract] |  |
Held-to-maturity Securities - Carrying Amount | 324 |
Held-to-maturity Securities, Unrecognized Gain | 0 |
Held-to-maturity Securities - Estimated Fair Value | 324 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 324 |
Marketable securities | 0 |
Held-to-maturity Securities | U.S. reverse repurchase agreements |  |
Debt Securities, Held-to-maturity [Abstract] |  |
Held-to-maturity Securities - Carrying Amount | 7,892 |
Held-to-maturity Securities, Unrecognized Gain | 0 |
Held-to-maturity Securities - Estimated Fair Value | 7,892 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 7,892 |
Marketable securities | 0 |
Held-to-maturity Securities | Corporate debt securities(1) |  |
Debt Securities, Held-to-maturity [Abstract] |  |
Held-to-maturity Securities - Carrying Amount | 702 |
Held-to-maturity Securities, Unrecognized Gain | 0 |
Held-to-maturity Securities - Estimated Fair Value | 702 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 588 |
Marketable securities | 114 |
Held-to-maturity Securities | Money market funds |  |
Debt Securities, Held-to-maturity [Abstract] |  |
Held-to-maturity Securities - Carrying Amount | 3,822 |
Held-to-maturity Securities, Unrecognized Gain | 0 |
Held-to-maturity Securities - Estimated Fair Value | 3,822 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 3,822 |
Marketable securities | 0 |
Held-to-maturity Securities | Time deposits(1) |  |
Debt Securities, Held-to-maturity [Abstract] |  |
Held-to-maturity Securities - Carrying Amount | 626 |
Held-to-maturity Securities, Unrecognized Gain | 0 |
Held-to-maturity Securities - Estimated Fair Value | 626 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 626 |
Marketable securities | 0 |
Available-for-sale Securities |  |
Debt Securities, Available-for-sale [Abstract] |  |
Available-for-sale Securities - Carrying Amount | 9,344 |
Available-for-sale Securities, Unrecognized Gain | 2 |
Available-for-sale Securities - Estimated Fair Value | 9,346 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 8,715 |
Marketable securities | 631 |
Available-for-sale Securities | U.S. Gov’t securities |  |
Debt Securities, Available-for-sale [Abstract] |  |
Available-for-sale Securities - Carrying Amount | 9,064 |
Available-for-sale Securities - Estimated Fair Value | 9,064 |
Available-for-sale Securities | U.S. Gov’t Agencies |  |
Debt Securities, Available-for-sale [Abstract] |  |
Available-for-sale Securities - Carrying Amount | 41 |
Available-for-sale Securities - Estimated Fair Value | 43 |
Available-for-sale Securities | Non-U.S. sovereign securities |  |
Debt Securities, Available-for-sale [Abstract] |  |
Available-for-sale Securities - Carrying Amount | 2 |
Available-for-sale Securities - Estimated Fair Value | 2 |
Available-for-sale Securities | Corporate debt securities(1) |  |
Debt Securities, Available-for-sale [Abstract] |  |
Available-for-sale Securities - Carrying Amount | 237 |
Available-for-sale Securities - Estimated Fair Value | 237 |
Available-for-sale Securities | Non-U.S. sovereign securities |  |
Debt Securities, Available-for-sale [Abstract] |  |
Available-for-sale Securities, Unrecognized Gain | 0 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 0 |
Marketable securities | 2 |
Available-for-sale Securities | Corporate debt securities(1) |  |
Debt Securities, Available-for-sale [Abstract] |  |
Available-for-sale Securities, Unrecognized Gain | 0 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 50 |
Marketable securities | 187 |
Available-for-sale Securities | U.S. Gov’t securities |  |
Debt Securities, Available-for-sale [Abstract] |  |
Available-for-sale Securities, Unrecognized Gain | 0 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 8,665 |
Marketable securities | 399 |
Available-for-sale Securities | U.S. Gov’t Agencies |  |
Debt Securities, Available-for-sale [Abstract] |  |
Available-for-sale Securities, Unrecognized Gain | 2 |
Debt Securities, Available-for-sale and Held-to-maturity [Abstract] |  |
Cash and Cash Equivalents | 0 |
Marketable securities | $ 43 |

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