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Collaborative Arrangements - Ridgeback Biotherapeutics LP (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Sales	$ 64,168	$ 60,115	$ 59,283
Cost of sales	15,193	16,126	17,411
Selling, general and administrative	10,816	10,504	10,042
Research and development	17,938	30,531	13,548
Accrued and other current liabilities	15,694	15,766
Ridgeback Biotherapeutics LP | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Cost of sales	554	852	3,038
Selling, general and administrative	57	97	147
Research and development	13	60	88
Accrued and other current liabilities	68	113
Ridgeback Biotherapeutics LP | Lagevrio | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Sales	$ 964	$ 1,428	$ 5,684

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