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Investments and Fair Value Measurement - Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Financial Assets |  |
Non-marketable debt securities | $ 8,562 |
Non-marketable equity securities | 3,199 | $ 2,574
U.S. government and agency securities |  |
Financial Assets |  |
Non-marketable debt securities | 5,848 |
Commercial paper |  |
Financial Assets |  |
Non-marketable debt securities | 702 |
Corporate bonds |  |
Financial Assets |  |
Non-marketable debt securities | 1,974 |
Certificates of deposit |  |
Financial Assets |  |
Non-marketable debt securities | 38 |
Recurring |  |
Financial Assets |  |
Non-marketable equity securities | 11 | 0
Marketable equity securities | 5,106 | 3,401
Notes receivable from a related party | 144 | 126
Total financial assets | 15,691 | 10,400
Recurring | Level 1 |  |
Financial Assets |  |
Non-marketable equity securities | 0 | 0
Marketable equity securities | 5,106 | 3,401
Notes receivable from a related party | 0 | 0
Total financial assets | 6,974 | 4,554
Recurring | Level 2 |  |
Financial Assets |  |
Non-marketable equity securities | 0 | 0
Marketable equity securities | 0 | 0
Notes receivable from a related party | 0 | 0
Total financial assets | 8,562 | 5,720
Recurring | Level 3 |  |
Financial Assets |  |
Non-marketable equity securities | 11 | 0
Marketable equity securities | 0 | 0
Notes receivable from a related party | 144 | 126
Total financial assets | 155 | 126
Recurring | Money market funds |  |
Financial Assets |  |
Cash and cash equivalents | 1,868 | 1,153
Recurring | Money market funds | Level 1 |  |
Financial Assets |  |
Cash and cash equivalents | 1,868 | 1,153
Recurring | Money market funds | Level 2 |  |
Financial Assets |  |
Cash and cash equivalents | 0 | 0
Recurring | Money market funds | Level 3 |  |
Financial Assets |  |
Cash and cash equivalents | 0 | 0
Recurring | U.S. government and agency securities |  |
Financial Assets |  |
Non-marketable debt securities | 5,848 | 4,840
Recurring | U.S. government and agency securities | Level 1 |  |
Financial Assets |  |
Non-marketable debt securities | 0 | 0
Recurring | U.S. government and agency securities | Level 2 |  |
Financial Assets |  |
Non-marketable debt securities | 5,848 | 4,840
Recurring | U.S. government and agency securities | Level 3 |  |
Financial Assets |  |
Non-marketable debt securities | 0 | 0
Recurring | Commercial paper |  |
Financial Assets |  |
Non-marketable debt securities | 702 | 351
Recurring | Commercial paper | Level 1 |  |
Financial Assets |  |
Non-marketable debt securities | 0 | 0
Recurring | Commercial paper | Level 2 |  |
Financial Assets |  |
Non-marketable debt securities | 702 | 351
Recurring | Commercial paper | Level 3 |  |
Financial Assets |  |
Non-marketable debt securities | 0 | 0
Recurring | Corporate bonds |  |
Financial Assets |  |
Non-marketable debt securities | 1,974 | 263
Recurring | Corporate bonds | Level 1 |  |
Financial Assets |  |
Non-marketable debt securities | 0 | 0
Recurring | Corporate bonds | Level 2 |  |
Financial Assets |  |
Non-marketable debt securities | 1,974 | 263
Recurring | Corporate bonds | Level 3 |  |
Financial Assets |  |
Non-marketable debt securities | 0 | 0
Recurring | Certificates of deposit |  |
Financial Assets |  |
Non-marketable debt securities | 38 | 266
Recurring | Certificates of deposit | Level 1 |  |
Financial Assets |  |
Non-marketable debt securities | 0 | 0
Recurring | Certificates of deposit | Level 2 |  |
Financial Assets |  |
Non-marketable debt securities | 38 | 266
Recurring | Certificates of deposit | Level 3 |  |
Financial Assets |  |
Non-marketable debt securities | $ 0 | $ 0

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