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Collaborative Arrangements - Ridgeback Biotherapeutics LP (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Sales	$ 15,529	$ 15,775
Cost of sales	3,419	3,540
Selling, general and administrative	2,552	2,483
Accrued and other current liabilities	12,772		$ 15,694
Ridgeback Biotherapeutics LP | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Cost of sales	53	191
Selling, general and administrative	13	16
Research and development	8	(5)
Accrued and other current liabilities	43		$ 68
Ridgeback Biotherapeutics LP | Lagevrio | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Sales	$ 102	$ 350

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