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Goodwill and Intangible Assets (Acquired Intangible Assets) (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2018 | Dec. 31, 2017
Acquired intangible assets disclosures |  |
Total gross carrying amount | $ 4,212 | $ 4,361
Total accumulated amortization | (2,129) | (2,073)
Total finite-lived intangible assets - net | 2,083 | 2,288
Non-amortizable intangible assets (primarily tradenames) | 643 | 648
Total intangible assets - net | $ 2,726 | 2,936
Indefinite lived tradenames years in existence | 55 years |
Customer related intangible assets |  |
Acquired intangible assets disclosures |  |
Total gross carrying amount | $ 2,301 | 2,332
Total accumulated amortization | (966) | (874)
Patents |  |
Acquired intangible assets disclosures |  |
Total gross carrying amount | 544 | 561
Total accumulated amortization | (486) | (489)
Other technology-based intangible assets |  |
Acquired intangible assets disclosures |  |
Total gross carrying amount | 578 | 583
Total accumulated amortization | (323) | (292)
Definite-lived tradenames |  |
Acquired intangible assets disclosures |  |
Total gross carrying amount | 664 | 678
Total accumulated amortization | (268) | (256)
Other amortizable intangible assets |  |
Acquired intangible assets disclosures |  |
Total gross carrying amount | 125 | 207
Total accumulated amortization | $ (86) | $ (162)

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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://fasb.org/us-gaap/role/ref/legacyRef -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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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 + Details
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