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Goodwill and Intangible Assets - Government Grants (Details) - USD ($) $ in Millions | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Finite-Lived Intangible Assets |  |
Gross carrying amount | $ 267.8 | $ 268.5
Government grants |  |
Finite-Lived Intangible Assets |  |
Gross carrying amount | 8.2 | 9.2
Government grants | Current |  |
Finite-Lived Intangible Assets |  |
Gross carrying amount | 0.5 | 0.5
Government grants | Long-term |  |
Finite-Lived Intangible Assets |  |
Gross carrying amount | $ 7.7 | $ 8.7

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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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