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Goodwill | 6 Months Ended
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Jun. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill | Goodwill The changes in the carrying amount of goodwill by reportable segment for the six months ended June 30, 2021 were as follows ($ in millions):
| AMS |  | EP |  | Total
Goodwill as of December 31, 2020 | $ | 398.4 |  |  | $ | 5.3 |  |  | $ | 403.7 |
Goodwill acquired during the period | 263.1 |  |  | — |  |  | 263.1 |
Foreign currency translation adjustments | 0.1 |  |  | (0.2) |  |  | (0.1) |
Goodwill as of June 30, 2021 | $ | 661.6 |  |  | $ | 5.1 |  |  | $ | 666.7 |

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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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