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Collaborative Arrangements - Ridgeback Biotherapeutics LP (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Sales	$ 16,657	$ 15,962	$ 48,544	$ 45,485
Cost of sales	4,080	4,264	11,365	12,214
Selling, general and administrative	2,731	2,519	7,952	7,700
Accrued and other current liabilities	16,539		16,539		$ 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	204	348	491	762
Selling, general and administrative	11	21	43	72
Research and development	5	8	7	33
Accrued and other current liabilities	176		176		$ 113
Ridgeback Biotherapeutics LP | Lagevrio | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Sales	$ 383	$ 640	$ 843	$ 1,236

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