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Other Financial Information - Comirnaty Gross Profit Split (Details) - USD ($) $ in Millions	Sep. 28, 2025	Dec. 31, 2024
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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