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Investments (Tables) | 12 Months Ended
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Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract] |
Schedule of Available-For-Sale Investments | The amortized cost, gross unrealized gains, gross unrealized losses and fair values of interest-bearing securities, which are classified as available for sale, by type of security were as follows (in millions):
Types of securities as of December 31, 2024 |  | Amortized cost |  | Gross unrealized gains |  | Gross unrealized losses |  | Fair values
U.S. Treasury bills |  | $ | 997 |  |  | $ | — |  |  | $ | — |  |  | $ | 997 |
Money market mutual funds |  | 10,354 |  |  | — |  |  | — |  |  | 10,354 |
Other short-term interest-bearing securities |  | 135 |  |  | — |  |  | — |  |  | 135 |
Total available-for-sale investments |  | $ | 11,486 |  |  | $ | — |  |  | $ | — |  |  | $ | 11,486 |
Types of securities as of December 31, 2023 |  | Amortized cost |  | Gross unrealized gains |  | Gross unrealized losses |  | Fair values
U.S. Treasury bills |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Money market mutual funds |  | 10,266 |  |  | — |  |  | — |  |  | 10,266 |
Other short-term interest-bearing securities |  | 138 |  |  | — |  |  | — |  |  | 138 |
Total available-for-sale investments |  | $ | 10,404 |  |  | $ | — |  |  | $ | — |  |  | $ | 10,404 |
Schedule of Fair Values by Classification | The fair values of available-for-sale investments by location in the Consolidated Balance Sheets were as follows (in millions):
|  | December 31,
Consolidated Balance Sheets locations |  | 2024 |  | 2023
Cash and cash equivalents |  | $ | 11,486 |  |  | $ | 10,404 |
Total available-for-sale investments |  | $ | 11,486 |  |  | $ | 10,404 |

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