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Divestitures and Held for Sale - Summary of Amounts Included in Discontinued Operations (Parenthetical) (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2018 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
Gain on sale of discontinued operations | $ 832.0
Accounting Standards Update 2014-09 [Member] |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
Amount reclassified from cost of product sold to net sales | $ 51.3

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