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Goodwill and Other Intangible Assets (Tables) | 6 Months Ended
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Jun. 30, 2019
Goodwill and Other Intangible Assets [Abstract] |
Intangible Assets Subject to Amortization | Intangible assets subject to amortization as of June 30, 2019 and December 31, 2018 were as follows:
|  |  |  |  | June 30, 2019 |  |  | Dec. 31, 2018 |
(millions of dollars) |  | Weighted Average Useful Life (Years) |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |
Tradenames |  |  | 35 |  |  | $ | 203.9 |  |  | $ | 29.5 |  |  | $ | 204.2 |  |  | $ | 26.6 |
Technology |  |  | 13 |  |  |  | 18.8 |  |  |  | 7.2 |  |  |  | 18.8 |  |  |  | 6.4 |
Patents |  |  | 19 |  |  |  | 6.4 |  |  |  | 5.8 |  |  |  | 6.4 |  |  |  | 5.6 |
Customer relationships |  |  | 22 |  |  |  | 25.1 |  |  |  | 3.8 |  |  |  | 26.5 |  |  |  | 3.2 |
|  |  | 32 |  |  | $ | 254.2 |  |  | $ | 46.3 |  |  | $ | 255.9 |  |  | $ | 41.8 |

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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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