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Net Sales and Long-Lived Assets by Geographic Location (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Long-lived Assets | $ 604.1 |  |  |  | $ 528.2 |  |  |  | $ 604.1 | $ 528.2 | $ 513.0
Net sales | 768.6 | $ 749.9 | $ 738.2 | $ 740.0 | 698.1 | $ 683.9 | $ 667.0 | $ 636.9 | 2,996.7 | 2,685.9 | 2,536.5
United States |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Long-lived Assets | 303.0 |  |  |  | 292.4 |  |  |  | 303.0 | 292.4 | 297.8
Net sales |  |  |  |  |  |  |  |  | 1,698.1 | 1,570.7 | 1,531.4
China |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Long-lived Assets | 250.8 |  |  |  | 184.3 |  |  |  | 250.8 | 184.3 | 157.3
Net sales |  |  |  |  |  |  |  |  | 1,034.9 | 887.1 | 787.1
Canada |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Long-lived Assets | 3.2 |  |  |  | 3.1 |  |  |  | 3.2 | 3.1 | 2.7
Net sales |  |  |  |  |  |  |  |  | 163.7 | 138.7 | 129.9
Other Foreign |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Long-lived Assets | $ 47.1 |  |  |  | $ 48.4 |  |  |  | 47.1 | 48.4 | 55.2
Net sales |  |  |  |  |  |  |  |  | $ 100.0 | $ 89.4 | $ 88.1

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- Definition Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and 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(a)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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