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Condensed Consolidated Balance Sheet Components - Summary of Other Current Liabilities (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Balance Sheet Related Disclosures [Abstract]    
Accrued research and development $ 52 $ 65
Accrued personnel expenses 17 31
Current portion of lease liabilities 12 12
Other 17 15
Total other current liabilities $ 98 $ 123