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Goodwill and Other Intangible Assets (Details 2) - USD ($) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2017 | Mar. 31, 2018 | Dec. 31, 2017
Intangible assets with finite lives |  |  |
Gross Carrying Amount |  | $ 4,093 | $ 4,013
Accumulated Amortization and Impairment |  | 2,431 | 2,280
Net Carrying Amount |  | 1,662 | 1,733
Estimated amortization for intangible assets |  |  |
Remainder of 2018 |  | 332 |
2019 |  | 430 |
2020 |  | 252 |
2021 |  | 151 |
2022 |  | 101 |
Thereafter |  | 396 |
Total |  | 1,662 |
Customer related and contract based |  |  |
Intangible assets with finite lives |  |  |
Gross Carrying Amount |  | 2,615 | 2,550
Accumulated Amortization and Impairment |  | 1,496 | 1,415
Net Carrying Amount |  | 1,119 | 1,135
Tradenames |  |  |
Intangible assets with finite lives |  |  |
Gross Carrying Amount |  | 1,052 | 1,047
Accumulated Amortization and Impairment |  | 589 | 533
Net Carrying Amount |  | 463 | 514
Technology and other |  |  |
Intangible assets with finite lives |  |  |
Gross Carrying Amount |  | 426 | 416
Accumulated Amortization and Impairment |  | 346 | 332
Net Carrying Amount |  | $ 80 | $ 84
Discontinued Operations, Disposed of by Sale | Tempo Business | Tradenames |  |  |
Intangible assets with finite lives |  |  |
Impairment of tradename | $ 380 |  |

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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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