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Business Acquisitions, Dispositions, Goodwill and Intangible Assets (Intangible Assets) (Details) - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Goodwill and Intangible Assets Disclosure [Abstract] |  |
Trademarks and other | $ 2,025 | $ 2,069
Total | 20,920 | 20,173
Finite-Lived Intangible Assets [Line Items] |  |
Gross Amount | 18,895 | 18,104
Accumulated Amortization | 5,236 | 4,570
Service Portfolios [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Amount | 1,995 | 1,977
Accumulated Amortization | 1,344 | 1,307
Patents and trademarks [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Amount | 378 | 361
Accumulated Amortization | 201 | 189
Collaboration [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Amount | 3,724 | 3,336
Accumulated Amortization | 211 | 86
Customer Relationships and Other |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Amount | 12,798 | 12,430
Accumulated Amortization | $ 3,480 | $ 2,988

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