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Goodwill (Tables) | 6 Months Ended
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Jun. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | The changes in the carrying amount of goodwill by segment for the six months ended June 30, 2020 were as follows ($ in millions):
| AMS |  | EP |  | Total
Goodwill as of December 31, 2019 | $ | 332.5 |  |  | $ | 4.9 |  |  | $ | 337.4 |
Goodwill acquired during the period | 61.2 |  |  | — |  |  | 61.2 |
Foreign currency translation adjustments | (0.7) |  |  | — |  |  | (0.7) |
Goodwill as of June 30, 2020 | $ | 393.0 |  |  | $ | 4.9 |  |  | $ | 397.9 |

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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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