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Acquisitions, Dispositions, Goodwill and Other Intangible Assets (Intangible Assets) (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items] |  |
Gross Amount | $ 30,426 | $ 30,533
Accumulated Amortization | 8,634 | 8,403
Unamortized: Trademarks and Other | 3,808 | 3,916
Total Intangible Assets Gross Excluding Goodwill | 34,234 | 34,449
Impairment of Intangible Asset, Tradename | 40 |
Service portfolios [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Amount | 2,052 | 2,105
Accumulated Amortization | 1,600 | 1,626
Patents and trademarks [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Amount | 350 | 356
Accumulated Amortization | 249 | 250
Collaboration intangible assets [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Amount | 4,940 | 4,862
Accumulated Amortization | 990 | 920
Customer relationships and other [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Amount | 23,084 | 23,210
Accumulated Amortization | $ 5,795 | $ 5,607

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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