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Acquisitions, Dispositions, Goodwill and Intangible Assets (Intangible Assets) (Details) - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021
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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)

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