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Other Balance Sheet Components - Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Millions | Dec. 31, 2025 | Dec. 31, 2024
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Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Prepaid services | $ 169 | $ 173
Down payments and prepayments related to manufacturing and materials | 61 | 106
Interest receivable | 42 | 59
Value added tax receivable | 37 | 45
Prepaid income tax | 33 | 28
Collaboration receivable | 13 | 58
Income tax receivable | 8 | 72
Other current assets | 45 | 58
Prepaid expenses and other current assets | $ 408 | $ 599

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