Acquisitions, Dispositions, Goodwill and Intangible Assets (Intangible Assets) (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 39,275	$ 39,188
Accumulated Amortization	(9,847)	(9,368)
Unamortized: Trademarks and Other	8,690	8,696
Total Intangible Assets Gross Excluding Goodwill	47,965	47,884
Collaboration assets
Finite-Lived Intangible Assets [Line Items]
Gross Amount	5,373	5,319
Accumulated Amortization	(1,227)	(1,173)
Exclusivity assets
Finite-Lived Intangible Assets [Line Items]
Gross Amount	2,737	2,673
Accumulated Amortization	(328)	(318)
Developed technology and other
Finite-Lived Intangible Assets [Line Items]
Gross Amount	1,208	1,214
Accumulated Amortization	(487)	(466)
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Amount	29,957	29,982
Accumulated Amortization	$ (7,805)	$ (7,411)