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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 |  |

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