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Collaborative Arrangements - Bristol Meyers Squibb Company - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Bristol Myers Squibb | Licensing Agreements      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Royalty rate, deduction, percentage 50.00%    
Bristol Myers Squibb | Licensing Agreements | Regulatory Milestones      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Proceeds from collaborators     $ 20
Bristol Myers Squibb | Licensing Agreements | Alliance Revenue-Reblozyl      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Sales milestone payments $ 80    
Bristol Myers Squibb | Minimum | Licensing Agreements      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Royalty rate, percentage 20.00%    
Bristol Myers Squibb | Maximum | Licensing Agreements      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Royalty rate, percentage 24.00%    
Bristol Myers Squibb Company | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Revenue from collaborative arrangement $ 371 $ 212 $ 166