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Goodwill | 12 Months Ended
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Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill | Goodwill The Company evaluates goodwill for impairment at least annually during the fourth quarter. The annual tests during the fourth quarters of 2021, 2020 and 2019 resulted in no impairment. Each of the Company's two reportable segments, AMS and EP, have goodwill. There are no accumulated impairment losses in the AMS segment as of December 31, 2021. The EP segment has recorded $2.7 million in accumulated impairment losses in previous years. The changes in the carrying amount of goodwill for each reportable segment were as follows ($ in millions):
| Advanced Materials & Structures |  | Engineered Papers |  | Total
Goodwill as of December 31, 2019 | $ | 332.5 |  |  | $ | 4.9 |  |  | $ | 337.4 |
Goodwill acquired during the year | 61.2 |  |  | — |  |  | 61.2 |
Foreign currency translation adjustments | 4.7 |  |  | 0.4 |  |  | 5.1 |
Goodwill as of December 31, 2020 | $ | 398.4 |  |  | $ | 5.3 |  |  | $ | 403.7 |
Goodwill acquired during the year | 250.4 |  |  | — |  |  | 250.4 |
Foreign currency translation adjustments | (5.4) |  |  | (0.4) |  |  | (5.8) |
Goodwill as of December 31, 2021 | $ | 643.4 |  |  | $ | 4.9 |  |  | $ | 648.3 |

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- Definition The entire disclosure for goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=2144439 + Details
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