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Collaborative Arrangements - Daiicho Sankyo (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Selling, general and administrative $ 10,816 $ 10,504 $ 10,042
Research and development 17,938 30,531 13,548
Other current assets 38,782 32,168  
Accrued and other current liabilities 15,694 15,766  
Daiichi Sankyo | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Selling, general and administrative 26 3  
Research and development 351 5,549  
Other current assets 8 0  
Accrued and other current liabilities 817 800  
Other Noncurrent Liabilities 0 750  
Bayer AG | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Selling, general and administrative 111 131 153
Research and development 102 90 $ 75
Other current assets 160 156  
Accrued and other current liabilities $ 82 $ 80