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Goodwill | 9 Months Ended
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Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill | Goodwill The changes in the carrying amount of goodwill by segment for the nine months ended September 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 | 1.5 |  |  | 0.2 |  |  | 1.7 |
Goodwill as of September 30, 2020 | $ | 395.2 |  |  | $ | 5.1 |  |  | $ | 400.3 |

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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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