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Goodwill and Intangible Assets (Intangible Assets) (Details) - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Gross Amount | $ 28.6 | $ 27.1
Accumulated Amortization | (21.3) | (20.9)
Net Amount | 7.3 | 6.2
Customer Relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Amount | 15.9 | 15.9
Accumulated Amortization | (14.9) | (14.6)
Net Amount | 1.0 | 1.3
Patents and Others [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Amount | 12.7 | 11.2
Accumulated Amortization | (6.4) | (6.3)
Net Amount | $ 6.3 | $ 4.9

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + 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)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + 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)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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