Acquisitions, Dispositions, Goodwill and Intangible Assets (Intangible Assets) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 39,589	$ 39,424
Accumulated Amortization	(11,756)	(11,242)
Indefinite-Lived: Trademarks and Other	8,644	8,641
Total Intangible Assets Gross Excluding Goodwill	48,233	48,065
Collaboration assets
Finite-Lived Intangible Assets [Line Items]
Gross Amount	5,595	5,536
Accumulated Amortization	(1,470)	(1,408)
Exclusivity assets
Finite-Lived Intangible Assets [Line Items]
Gross Amount	3,002	2,911
Accumulated Amortization	(325)	(323)
Developed technology and other
Finite-Lived Intangible Assets [Line Items]
Gross Amount	1,204	1,202
Accumulated Amortization	(567)	(544)
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Amount	29,788	29,775
Accumulated Amortization	$ (9,394)	$ (8,967)