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Goodwill and Other Intangible Assets (Tables) | 9 Months Ended
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Sep. 30, 2018
Goodwill and Other Intangible Assets [Abstract] |
Intangible Assets Subject to Amortization | Intangible assets subject to amortization as of September 30, 2018 and December 31, 2017 were as follows:
|  |  |  |  | Sep. 30, 2018 |  |  | Dec. 31 2017 |
(millions of dollars) |  | Weighted Average Useful Life (Years) |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |
Tradenames |  |  | 34 |  |  | $ | 209.8 |  |  | $ | 24.6 |  |  | $ | 199.8 |  |  | $ | 20.7 |
Technology |  |  | 12 |  |  |  | 18.8 |  |  |  | 6.0 |  |  |  | 18.8 |  |  |  | 4.8 |
Patents and trademarks |  |  | 17 |  |  |  | 6.4 |  |  |  | 5.5 |  |  |  | 6.4 |  |  |  | 5.3 |
Customer relationships |  |  | 30 |  |  |  | 14.5 |  |  |  | 3.1 |  |  |  | 4.5 |  |  |  | 2.2 |
|  |  | 28 |  |  | $ | 249.5 |  |  | $ | 39.2 |  |  | $ | 229.5 |  |  | $ | 33.0 |

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- Definition Tabular disclosure of the characteristics, including initial carrying value, residual amount, weighted average useful life, of finite-lived intangible assets acquired during the period by major class. A major class is composed of intangible assets that can be grouped together because they are similar, either by nature or by their use in the operations of the company. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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