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Revenue Recognition - Disaggregation of Net Sales by Place of Manufacture and to Location of Customer (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Entity Wide Information Revenue From External Customer [Line Items] |  |
Net sales | $ 430.4 | $ 369.8
ASC 606 |  |
Entity Wide Information Revenue From External Customer [Line Items] |  |
Net sales | 430.4 | 369.8
ASC 606 | Point of origin | Reportable Geographical Components | Germany |  |
Entity Wide Information Revenue From External Customer [Line Items] |  |
Net sales | 234.5 | 183.6
ASC 606 | Point of origin | Reportable Geographical Components | United States |  |
Entity Wide Information Revenue From External Customer [Line Items] |  |
Net sales | 196.8 | 205.7
ASC 606 | Point of origin | Reportable Geographical Components | Canada |  |
Entity Wide Information Revenue From External Customer [Line Items] |  |
Net sales | 71.6 | 77.9
ASC 606 | Point of origin | Reportable Geographical Components | Belgium |  |
Entity Wide Information Revenue From External Customer [Line Items] |  |
Net sales | 69.7 | 58.1
ASC 606 | Point of origin | Reportable Geographical Components | Norway |  |
Entity Wide Information Revenue From External Customer [Line Items] |  |
Net sales | 53.1 | 47.3
ASC 606 | Point of origin | Eliminations |  |
Entity Wide Information Revenue From External Customer [Line Items] |  |
Net sales | (195.3) | (202.8)
ASC 606 | Point of destination | Europe |  |
Entity Wide Information Revenue From External Customer [Line Items] |  |
Net sales | 233.9 | 179.7
ASC 606 | Point of destination | North America |  |
Entity Wide Information Revenue From External Customer [Line Items] |  |
Net sales | 127.0 | 124.0
ASC 606 | Point of destination | Other |  |
Entity Wide Information Revenue From External Customer [Line Items] |  |
Net sales | $ 69.5 | $ 66.1

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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