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Segment Information - Reconciliation of Revenue from Segments to Consolidated (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | [1] | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | [1] | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total net sales | $ 1,186.6 | $ 1,242.8 | $ 1,285.5 | $ 1,176.9 | $ 1,093.3 | $ 1,085.4 | $ 1,146.9 | $ 1,102.1 | $ 4,891.8 | $ 4,427.7 | $ 4,488.4
Primary Reporting Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total net sales |  |  |  |  |  |  |  |  | 3,884.2 | 3,541.8 | 3,619.6
China [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total net sales |  |  |  |  |  |  |  |  | $ 1,007.6 | $ 885.9 | $ 868.8
[1] | The fourth quarters of both 2018 and 2017 include the impact of U.S. Tax Reform enacted during the fourth quarter of 2017, as described further in Note 12, Income Taxes.

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