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Collaborative Arrangements - Ridgeback Biotherapeutics LP (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Sales	$ 17,276	$ 16,657	$ 48,611	$ 48,544
Cost of sales	3,855	4,080	10,831	11,365
Selling, general and administrative	2,633	2,731	7,835	7,952
Accrued and other current liabilities	16,186		16,186		$ 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	81	204	178	491
Selling, general and administrative	11	11	39	43
Research and development	11	5	25	7
Accrued and other current liabilities	49		49		$ 68
Ridgeback Biotherapeutics LP | Lagevrio | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Sales	$ 138	$ 383	$ 323	$ 843

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