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Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | The changes in the carrying amount of goodwill by reportable segment were as follows:
($ in millions) | Proprietary Products |  | Contract-Manufactured Products |  | Total
Balance, December 31, 2016 | $ | 73.7 |  |  | $ | 29.3 |  |  | $ | 103.0 |
Foreign currency translation | 3.9 |  |  | 0.8 |  |  | 4.7 |
Balance, December 31, 2017 | 77.6 |  |  | 30.1 |  |  | 107.7 |
Foreign currency translation | (1.6 | ) |  | (0.3 | ) |  | (1.9 | )
Balance, December 31, 2018 | $ | 76.0 |  |  | $ | 29.8 |  |  | $ | 105.8 |
Schedule of Intangible Assets by Major Class | Intangible assets and accumulated amortization as of December 31 were as follows:
| 2018 |  | 2017
($ in millions) | Cost |  | Accumulated Amortization |  | Net |  | Cost |  | Accumulated Amortization |  | Net
Patents and licensing | $ | 19.6 |  |  | $ | (15.1 | ) |  | $ | 4.5 |  |  | $ | 18.2 |  |  | $ | (14.1 | ) |  | $ | 4.1 |
Technology | 3.3 |  |  | (1.2 | ) |  | 2.1 |  |  | 3.3 |  |  | (1.0 | ) |  | 2.3 |
Trademarks | 2.0 |  |  | (1.8 | ) |  | 0.2 |  |  | 2.0 |  |  | (1.7 | ) |  | 0.3 |
Customer relationships | 29.3 |  |  | (20.0 | ) |  | 9.3 |  |  | 29.3 |  |  | (19.1 | ) |  | 10.2 |
Customer contracts | 11.0 |  |  | (6.8 | ) |  | 4.2 |  |  | 11.1 |  |  | (6.3 | ) |  | 4.8 |
| $ | 65.2 |  |  | $ | (44.9 | ) |  | $ | 20.3 |  |  | $ | 63.9 |  |  | $ | (42.2 | ) |  | $ | 21.7 |

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