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Goodwill and Intangible Assets - Intangible Assets (Excluding Goodwill) (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Dec. 31, 2017
Schedule of Finite-lived and Indefinite-lived Intangible Assets |  |
Weighted-average Estimated Useful Life | 15 years |
Gross Carrying Amount | $ 298.5 | $ 295.0
Accumulated Amortization | (103.6) | (97.6)
Total intangible assets | 403.6 | 400.1
Trademarks and trade names |  |
Schedule of Finite-lived and Indefinite-lived Intangible Assets |  |
Indefinite-lived intangible assets | $ 105.1 | 105.1
Customer relationships |  |
Schedule of Finite-lived and Indefinite-lived Intangible Assets |  |
Weighted-average Estimated Useful Life | 14 years |
Gross Carrying Amount | $ 247.1 | 246.3
Accumulated Amortization | $ (93.1) | (88.2)
Unpatented technology |  |
Schedule of Finite-lived and Indefinite-lived Intangible Assets |  |
Weighted-average Estimated Useful Life | 12 years |
Gross Carrying Amount | $ 28.8 | 26.8
Accumulated Amortization | $ (5.3) | (4.5)
Land use rights |  |
Schedule of Finite-lived and Indefinite-lived Intangible Assets |  |
Weighted-average Estimated Useful Life | 50 years |
Gross Carrying Amount | $ 14.0 | 13.4
Accumulated Amortization | $ (1.3) | (1.2)
Trademarks and trade names |  |
Schedule of Finite-lived and Indefinite-lived Intangible Assets |  |
Weighted-average Estimated Useful Life | 14 years |
Gross Carrying Amount | $ 5.4 | 5.5
Accumulated Amortization | $ (2.7) | (2.9)
Patents and other |  |
Schedule of Finite-lived and Indefinite-lived Intangible Assets |  |
Weighted-average Estimated Useful Life | 6 years |
Gross Carrying Amount | $ 3.2 | 3.0
Accumulated Amortization | $ (1.2) | $ (0.8)

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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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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