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Marketable Securities - Current and Non-current (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Debt Securities, Available-for-sale |  |
Current marketable securities | $ 255 | $ 50
Non-current marketable securities | 34 | 20
Total marketable securities | 289 | 70
Asset backed securities |  |
Debt Securities, Available-for-sale |  |
Current marketable securities | 4 | 0
Non-current marketable securities | 4 | 0
Foreign corporate debt |  |
Debt Securities, Available-for-sale |  |
Current marketable securities | 6 | 0
U.S. government securities |  |
Debt Securities, Available-for-sale |  |
Current marketable securities | 27 | 0
Corporate debt securities |  |
Debt Securities, Available-for-sale |  |
Current marketable securities | 70 | 0
Non-current marketable securities | 10 | 0
Commercial paper |  |
Debt Securities, Available-for-sale |  |
Current marketable securities | 40 | 0
Certificates of deposit/time deposits |  |
Debt Securities, Available-for-sale |  |
Current marketable securities | 91 | 46
U.S. treasury securities |  |
Debt Securities, Available-for-sale |  |
Current marketable securities | 13 | 0
U.S. municipal securities |  |
Debt Securities, Available-for-sale |  |
Current marketable securities | 4 | 4
Non-current marketable securities | $ 20 | $ 20

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