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Collaborative Arrangements - Ridgeback Biotherapeutics LP (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Sales	$ 15,806	$ 16,112	$ 31,335	$ 31,887
Cost of sales	3,557	3,745	6,976	7,285
Selling, general and administrative	2,649	2,739	5,202	5,221
Accrued and other current liabilities	14,502		14,502		$ 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	44	96	97	287
Selling, general and administrative	14	16	28	32
Research and development	6	7	14	2
Accrued and other current liabilities	31		31		$ 68
Ridgeback Biotherapeutics LP | Lagevrio | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Sales	$ 83	$ 110	$ 185	$ 460

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