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Marketable Securities - Current and Non-current (Details) - USD ($) $ in Millions | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Debt Securities, Available-for-sale |  |
Current marketable securities | $ 185 | $ 201
Non-current marketable securities | 27 | 27
Total marketable securities | 212 | 228
Commercial paper |  |
Debt Securities, Available-for-sale |  |
Current marketable securities | 130 | 109
Certificates of deposit/time deposits |  |
Debt Securities, Available-for-sale |  |
Current marketable securities | 52 | 14
U.S. treasury securities |  |
Debt Securities, Available-for-sale |  |
Current marketable securities | 0 | 75
U.S. municipal securities |  |
Debt Securities, Available-for-sale |  |
Current marketable securities | 3 | 3
Non-current marketable securities | $ 27 | $ 27

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