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Net Product Sales - Product Sales (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Net product sales	$ 1,944	$ 3,236	$ 6,848
Net product sales
Disaggregation of Revenue [Line Items]
Gross product sales	3,304	4,517	8,203
Wholesaler chargebacks, discounts and fees	(1,037)	(1,141)	(976)
Returns, rebates and other fees	(449)	(267)	(556)
Total product sales provision	(1,486)	(1,408)	(1,532)
Net product sales	$ 1,818	3,109	$ 6,671
Prior period revisions, adjustment		$ 216

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