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Acquisitions, Discontinued Operations, and Other Dispositions - Consolidated Statements (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from discontinued operations	$ 0.0	$ 0.0	$ (16.6)
Balcke Durr | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues			153.4
Costs of products sold			144.2
Selling, general and administrative			31.4
Special charges (credits), net			(1.3)
Other expense, net			(0.2)
Loss before taxes			(21.1)
Income tax benefit		9.4	4.5
Loss from discontinued operations		$ (6.8)	(16.6)
Depreciation and amortization			2.0
Capital expenditures			$ 0.7

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