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Goodwill and Intangible Assets (Intangible Assets) (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]    
Gross Amount $ 40,633 $ 40,436
Accumulated Amortization (15,991) (15,456)
Indefinite-Lived: Trademarks and Other 8,474 8,463
Total Gross Amount 49,107 48,899
Collaboration assets    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount 6,197 6,159
Accumulated Amortization (2,058) (1,996)
Exclusivity assets    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount 3,793 3,692
Accumulated Amortization (371) (361)
Developed technology and other    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount 1,203 1,197
Accumulated Amortization (722) (698)
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount 29,440 29,388
Accumulated Amortization $ (12,840) $ (12,401)