Discontinued Operations and Other Dispositions - Narrative (Details) - USD ($) $ in Millions			3 Months Ended			12 Months Ended
	Mar. 30, 2016	Sep. 26, 2015	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
2018						$ 8.3
2019						7.9
2020						6.5
2021						4.6
2022						4.4
Cash consideration, exclusive of cash transferred							$ 30.2
Cash transferred with sale of business						0.0	0.0	$ 208.6
Gain (loss) on sale						0.0	18.4	0.0
Other businesses included in discontinued operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Adjustment to loss on sale of discontinued operations, net of tax						1.5	2.7	$ 5.2
Dry Cooling Business | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash consideration, exclusive of cash transferred	$ 47.6
Cash transferred with sale of business	3.0
Gain (loss) on sale	18.4		$ 1.7	$ 1.2	$ 17.9		18.4
Amount Reclassified from AOCI | Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest | Dry Cooling Business | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on sale	$ 40.4					0.0	$ 40.4
Office lease associated with corporate headquarters | SPX Flow, Inc | Discontinued Operations, Disposed of by Means Other than Sale, Spinoff
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Duration of office lease agreement		5 years
2018						2.1
2019						2.1
2020						2.1
2021						2.1
2022						$ 2.1