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Goodwill | 3 Months Ended
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Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill | Goodwill The changes in the carrying amount of goodwill by segment for the three months ended March 31, 2017 were as follows ($ in millions):
| Advanced Materials & Structures |  | Engineered Papers |  | Total
Goodwill as of December 31, 2016 | $ | 224.8 |  |  | $ | 4.7 |  |  | $ | 229.5 |
Goodwill acquired during the period | 107.0 |  |  | — |  |  | 107.0 |
Foreign currency translation adjustments | 0.6 |  |  | (0.1 | ) |  | 0.5 |
Goodwill as of March 31, 2017 | $ | 332.4 |  |  | $ | 4.6 |  |  | $ | 337.0 |

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- Definition The entire disclosure for goodwill. + References No definition available. + Details
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