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Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Intangible Assets | The gross carrying amount and accumulated amortization for intangible assets consisted of the following ($ in millions):
| December 31, 2014 |  | December 31, 2013
| Gross Carrying Amount |  | Accumulated Amortization* |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization* |  | Net Carrying Amount
Amortized intangible assets |  |  |  |  |  |  |  |  |  |  |
Customer-related intangibles (Reconstituted Tobacco) | $ | 10.0 |  |  | $ | 10.0 |  |  | $ | — |  |  | $ | 10.0 |  |  | $ | 10.0 |  |  | $ | — |
Customer Relationships (Filtration) | 51.4 |  |  | 2.1 |  |  | 49.3 |  |  | 45.3 |  |  | 0.1 |  |  | 45.2 |
Developed Technology (Filtration) | 16.0 |  |  | 1.2 |  |  | 14.8 |  |  | 13.8 |  |  | 0.1 |  |  | 13.7 |
Customer Contracts (Filtration) | 1.9 |  |  | — |  |  | 1.9 |  |  | — |  |  | — |  |  | — |
Patents (Filtration) | 1.5 |  |  | — |  |  | 1.5 |  |  | — |  |  | — |  |  | — |
Total | $ | 80.8 |  |  | $ | 13.3 |  |  | $ | 67.5 |  |  | $ | 69.1 |  |  | $ | 10.2 |  |  | $ | 58.9 |
Unamortized intangible assets (Filtration) |  |  |  |  |  |  |  |  |  |
Trade names | $ | 21.8 |  |  |  |  |  |  | $ | 21.8 |  |  |  |  |
* Accumulated amortization also includes adjustments for foreign currency translation.
Schedule of Future Amortization Expense | The following table shows the estimated aggregate amortization expense for the next five years ($ in millions):
For the year ended December 31, | Estimated Amortization Expense
2015 | $ | 4.2 |
2016 | 4.2 |
2017 | 3.8 |
2018 | 3.8 |
2019 | 3.8 |

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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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