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Condensed Consolidated Balance Sheet Components - Summary of Other Current Liabilities (Details) - USD ($)
$ in Millions
Jun. 30, 2024
Dec. 31, 2023
Balance Sheet Related Disclosures [Abstract]    
Accrued research and development $ 38 $ 36
Accrued personnel expenses 20 26
Current portion of lease liabilities 11 11
Other 2 3
Total other current liabilities $ 71 $ 76