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Goodwill and Other Intangible Assets, Net - Other Intangible Assets (Detail) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets, gross | $ 234.1 | $ 217.3
Accumulated amortization | (105.4) | (83.7)
Finite-live intangible asset, net | 128.7 | 133.6
Indefinite-lived intangible assets, gross/net carrying amount | 27.5 | 26.7
Other intangible assets | 261.6 | 244.0
Other intangible assets, net | 156.2 | 160.3
Customer relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets, gross | 166.2 | 155.8
Accumulated amortization | (74.4) | (59.3)
Finite-live intangible asset, net | $ 91.8 | 96.5
Finite-Lived Intangible Asset, Useful Life | 12 years 3 months 18 days |
Proprietary technology [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets, gross | $ 54.4 | 52.5
Accumulated amortization | (21.8) | (16.8)
Finite-live intangible asset, net | $ 32.6 | 35.7
Finite-Lived Intangible Asset, Useful Life | 13 years 2 months 12 days |
Patents and Other [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets, gross | $ 13.5 | 9.0
Accumulated amortization | (9.2) | (7.6)
Finite-live intangible asset, net | $ 4.3 | $ 1.4
Finite-Lived Intangible Asset, Useful Life | 11 years 3 months 18 days |

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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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