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Collaborative Arrangements - Eisai Co., Ltd. (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Cost of sales	$ 3,419	$ 3,540
Selling, general and administrative	2,552	2,483
Research and development	3,621	3,992
Other current assets	35,503		$ 38,782
Eisai | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue from collaborative arrangement	258	255
Cost of sales	60	60
Selling, general and administrative	31	39
Research and development	5	$ 8
Other current assets	$ 263		$ 257

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