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Intangible Assets (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount |  | $ 197.8 | $ 80.8 |
Accumulated Amortization | [1] | 19.5 | 13.3 |
Net Carrying Amount |  | 178.3 | 67.5 |
Amortization expense of intangible assets |  | 5.6 | 3.1 | $ 0.6
Estimated Amortization Expense |  |  |  |
2016 |  | 12.3 |  |
2017 |  | 11.9 |  |
2018 |  | 11.9 |  |
2019 |  | 11.8 |  |
2020 |  | 11.5 |  |
Trade names [Member] | Advanced Materials & Structures [Member] |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |
Unamortized intangible assets |  | 35.6 | 21.8 |
Customer-related intangibles [Member] | Engineered Papers [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount |  | 10.0 | 10.0 |
Accumulated Amortization | [1] | 10.0 | 10.0 |
Net Carrying Amount |  | 0.0 | 0.0 |
Customer Relationships [Member] | Advanced Materials & Structures [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount |  | 167.7 | 52.4 |
Accumulated Amortization | [1] | 6.4 | 2.1 |
Net Carrying Amount |  | 161.3 | 50.3 |
Developed Technology [Member] | Advanced Materials & Structures [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount |  | 16.0 | 16.0 |
Accumulated Amortization | [1] | 2.4 | 1.2 |
Net Carrying Amount |  | 13.6 | 14.8 |
Customer Contracts [Member] | Advanced Materials & Structures [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount |  | 0.9 | 0.9 |
Accumulated Amortization | [1] | 0.5 | 0.0 |
Net Carrying Amount |  | 0.4 | 0.9 |
Non-Compete Agreements [Member] | Advanced Materials & Structures [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount |  | 1.7 | 0.0 |
Accumulated Amortization | [1] | 0.1 | 0.0 |
Net Carrying Amount |  | 1.6 | 0.0 |
Patents [Member] | Advanced Materials & Structures [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Gross Carrying Amount |  | 1.5 | 1.5 |
Accumulated Amortization | [1] | 0.1 | 0.0 |
Net Carrying Amount |  | $ 1.4 | $ 1.5 |
[1] | Accumulated amortization also includes adjustments for foreign currency translation.

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + 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)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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