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Goodwill and Intangible Assets (Intangible Assets) (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]    
Gross Amount $ 40,436 $ 40,094
Accumulated Amortization (15,456) (13,358)
Indefinite-Lived: Trademarks and Other 8,463 8,663
Total Intangible Assets Gross Excluding Goodwill 48,899 48,757
Collaboration assets    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount 6,159 5,810
Accumulated Amortization (1,996) (1,688)
Exclusivity assets    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount 3,692 3,460
Accumulated Amortization (361) (352)
Developed technology and other    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount 1,197 1,219
Accumulated Amortization (698) (635)
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount 29,388 29,605
Accumulated Amortization $ (12,401) $ (10,683)