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Other Financial Information - Comirnaty Gross Profit Split (Details) - USD ($) $ in Millions | Sep. 28, 2025 | Dec. 31, 2024
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Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |
Other current liabilities | $ 19,509 | $ 19,720
BioNTech [Member] | Comirnaty [Member] | Collaborative Arrangement [Member] |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |
Other current liabilities | $ 426 | $ 1,300

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