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Collaborative Arrangements - Daiicho Sankyo (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Selling, general and administrative	$ 2,731		$ 2,519	$ 7,952	$ 7,700
Research and development	5,862		3,307	13,354	20,904
Accrued and other current liabilities	16,539	$ 15,766		16,539
Daiichi Sankyo | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Selling, general and administrative	5		0	21	0
Research and development	94	5,500	$ 0	227	$ 0
Accrued and other current liabilities	811	800		811
Other noncurrent liabilities	$ 750	$ 750		$ 750

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