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Goodwill and Intangible Assets (Goodwill balance by business segment) (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Goodwill Information |  |  |  |
Purchased goodwill from acquisitions |  | $ 1,302,000,000 | $ 14,000,000 | $ 2,495,000,000
Goodwill acquired during the period which is deductible for tax purposes |  | 0 | 0 |
Increase (decrease) in goodwill related to preliminary allocation of purchase price for prior acquisitions |  |  | 39,000,000 |
Goodwill |  |  |  |
Balance at the beginning of the period | $ 10,513,000,000 | 9,166,000,000 | 9,249,000,000 |
Acquisition activity |  | 1,302,000,000 | 53,000,000 |
Divestiture activity |  | (323,000,000) |  |
Translation and other |  | 368,000,000 | (136,000,000) |
Balance at the end of the period |  | 10,513,000,000 | 9,166,000,000 | 9,249,000,000
Amount of Goodwill impairment | 0 | 0 | 0 | 0
Industrial |  |  |  |
Goodwill |  |  |  |
Balance at the beginning of the period | 2,678,000,000 | 2,536,000,000 | 2,573,000,000 |
Translation and other |  | 142,000,000 | (37,000,000) |
Balance at the end of the period |  | 2,678,000,000 | 2,536,000,000 | 2,573,000,000
Safety and Graphics |  |  |  |
Goodwill |  |  |  |
Balance at the beginning of the period | 4,419,000,000 | 3,324,000,000 | 3,342,000,000 |
Acquisition activity |  | 1,296,000,000 | 41,000,000 |
Divestiture activity |  | (323,000,000) |  |
Translation and other |  | 122,000,000 | (59,000,000) |
Balance at the end of the period |  | 4,419,000,000 | 3,324,000,000 | 3,342,000,000
Health Care |  |  |  |
Goodwill |  |  |  |
Balance at the beginning of the period | 1,682,000,000 | 1,609,000,000 | 1,624,000,000 |
Acquisition activity |  | 6,000,000 | 12,000,000 |
Translation and other |  | 67,000,000 | (27,000,000) |
Balance at the end of the period |  | 1,682,000,000 | 1,609,000,000 | 1,624,000,000
Electronics and Energy |  |  |  |
Goodwill |  |  |  |
Balance at the beginning of the period | 1,524,000,000 | 1,489,000,000 | 1,510,000,000 |
Translation and other |  | 35,000,000 | (21,000,000) |
Balance at the end of the period |  | 1,524,000,000 | 1,489,000,000 | 1,510,000,000
Consumer |  |  |  |
Goodwill |  |  |  |
Balance at the beginning of the period | $ 210,000,000 | 208,000,000 | 200,000,000 |
Translation and other |  | 2,000,000 | 8,000,000 |
Balance at the end of the period |  | $ 210,000,000 | $ 208,000,000 | $ 200,000,000

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