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Consolidated Balance Sheet Components - Summary of Other Current Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Balance Sheet Related Disclosures [Abstract]    
Accrued research and development $ 36 $ 45
Accrued personnel expenses 26 25
Current portion of lease liabilities 11 3
Other 3 3
Total other current liabilities $ 76 $ 76