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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2021
Goodwill and Other Intangible Assets [Abstract] |
Goodwill | The balance of goodwill by segment and the activity occurring in the past two fiscal years is as follows:
(millions of dollars) |  | Performance Materials |  |  | Specialty Minerals |  |  | Refractories |  |  | Consolidated |
Balance at December 31, 2019 |  | $ | 751.2 |  |  | $ | 12.5 |  |  | $ | 43.7 |  |  | $ | 807.4 |
Change in goodwill relating to: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange translation |  |  | 1.2 |  |  |  | 0.2 |  |  |  | (0.3 | ) |  |  | 1.1 |
Total Changes |  | $ | 1.2 |  |  | $ | 0.2 |  |  | $ | (0.3 | ) |  | $ | 1.1 |
Balance at December 31, 2020 |  | $ | 752.4 |  |  | $ | 12.7 |  |  | $ | 43.4 |  |  | $ | 808.5 |
Change in goodwill relating to: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Normerica acquisition |  |  | 104.5 |  |  |  | — |  |  |  | — |  |  |  | 104.5 |
Foreign exchange translation |  |  | (3.9 | ) |  |  | (0.1 | ) |  |  | (1.5 | ) |  |  | (5.5 | )
Total Changes |  | $ | 100.6 |  |  | $ | (0.1 | ) |  | $ | (1.5 | ) |  | $ | 99.0 |
Balance at December 31, 2021 |  | $ | 853.0 |  |  | $ | 12.6 |  |  | $ | 41.9 |  |  | $ | 907.5 |
Other Intangible Assets | Acquired intangible assets subject to amortization as of December 31, 2021 and December 31, 2020 were as follows:
|  |  |  |  | December 31, 2021 |  |  | December 31, 2020 |
|  | Weighted Average Useful Life (Years) |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |
Tradenames |  |  | 34 |  |  | $ | 221.6 |  |  | $ | 44.9 |  |  | $ | 203.9 |  |  | $ | 38.6 |
Technology |  |  | 13 |  |  |  | 18.8 |  |  |  | 11.2 |  |  |  | 18.8 |  |  |  | 9.6 |
Patents and trademarks |  |  | 19 |  |  |  | 6.4 |  |  |  | 6.4 |  |  |  | 6.4 |  |  |  | 6.1 |
Customer relationships |  |  | 21 |  |  |  | 75.2 |  |  |  | 7.9 |  |  |  | 26.9 |  |  |  | 5.9 |
|  |  | 29 |  |  | $ | 322.0 |  |  | $ | 70.4 |  |  | $ | 256.0 |  |  | $ | 60.2 |

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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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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13854-109267 + Details
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