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Divestitures and Held for Sale - Summary of Amounts Included in Discontinued Operations (Detail) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Discontinued Operations and Disposal Groups [Abstract] |  |
Net sales | $ 540.9 | $ 1,205.9
Cost of products sold | 378.8 | 805.8
Selling, general and administrative expenses | 76.7 | 254.1
Restructuring costs, net |  | 2.5
Impairment of goodwill, intangibles and other assets | 174.7 |
Operating income (loss) | (89.3) | 143.5
Non-operating expense (income) | (3.2) | 0.4
Income (loss) before income taxes | (86.1) | 143.1
Income tax expense (benefit) | (6.7) | 35.1
Net income (loss) | $ (79.4) | $ 108.0

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