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Segment Information - Reconciliation of Segment Operating Income to Consolidated Loss From Continuing Operations Before Income Taxes (Detail) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Operating income (loss) | $ 20.1 | $ 25.2
Interest expense | (13.9) | (15.5)
Other income (expense), net | (48.1) | (30.4)
Cost-reduction charges | (27.5) | (2.6)
Total loss from continuing operations before income taxes | (41.9) | (20.7)
Operating Segments |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Operating income (loss) | 28.2 | 26.9
Segment Reconciling Items |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Cost-reduction charges | (8.5) | (2.6)
Corporate and eliminations |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Operating income (loss) | $ 0.4 | $ 0.9

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