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Acquisitions, Dispositions, Goodwill and Intangible Assets (Intangible Assets) (Details) - USD ($)
$ in Millions
Sep. 30, 2023
Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]    
Gross Amount $ 40,074 $ 39,424
Accumulated Amortization (12,855) (11,242)
Indefinite-Lived: Trademarks and Other 8,646 8,641
Total Intangible Assets Gross Excluding Goodwill 48,720 48,065
Collaboration assets    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount 5,742 5,536
Accumulated Amortization (1,621) (1,408)
Exclusivity assets    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount 3,290 2,911
Accumulated Amortization (344) (323)
Developed technology and other    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount 1,212 1,202
Accumulated Amortization (608) (544)
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount 29,830 29,775
Accumulated Amortization $ (10,282) $ (8,967)