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Condensed Consolidated Balance Sheet Components - Summary of Other Current Liabilities (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
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Balance Sheet Related Disclosures [Abstract] |  |
Accrued research and development | $ 41 | $ 45
Accrued personnel expenses | 22 | 25
Current portion of lease liabilities | 9 | 3
Income taxes payable | 3 | 0
Other | 5 | 3
Total other current liabilities | $ 80 | $ 76

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