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Discontinued Operations and Other Dispositions - Consolidated Statements (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jul. 01, 2017 | Apr. 01, 2017 | Dec. 31, 2016 | Oct. 01, 2016 | Jul. 02, 2016 | Apr. 02, 2016 | Dec. 31, 2015 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Loss from discontinued operations |  |  |  |  |  |  |  |  |  | $ 0.0 | $ (16.6) | $ 39.8
Income before taxes |  |  |  |  |  |  |  |  |  | (6.6) | (110.7) | 65.1
Income tax provision |  |  |  |  |  |  |  |  |  | 11.9 | 12.8 | (30.5)
Income (loss) from discontinued operations, net of tax | $ (1.4) | $ 0.3 | $ (0.7) | $ 7.1 | $ (83.1) | $ (4.7) | $ (3.5) | $ (6.6) |  | 5.3 | (97.9) | 34.6
Less: Net loss attributable to noncontrolling interest |  |  |  |  |  |  |  |  |  | 0.0 | 0.0 | (0.9)
Income (loss) from discontinued operations attributable to SPX Corporation common shareholders for calculating basic and diluted income per share |  |  |  |  |  |  |  |  |  | 5.3 | (97.9) | 35.5
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] |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  | 1,775.1
Costs of products sold |  |  |  |  |  |  |  |  |  |  |  | 1,179.3
Selling, general and administrative |  |  |  |  |  |  |  |  |  |  |  | 368.2
Intangible amortization |  |  |  |  |  |  |  |  |  |  |  | 17.7
Special charges (credits), net |  |  |  |  |  |  |  |  |  |  |  | 41.2
Other income (expense), net |  |  |  |  |  |  |  |  |  |  |  | 1.3
Interest expense, net |  |  |  |  |  |  |  |  |  |  |  | (32.6)
Income before taxes |  |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 122.4
Income tax provision |  |  |  |  |  |  |  |  | $ (1.4) | 0.0 | 0.0 | (43.0)
Income (loss) from discontinued operations, net of tax |  |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 79.4
Less: Net loss attributable to noncontrolling interest |  |  |  |  |  |  |  |  |  |  |  | (0.9)
Income (loss) from discontinued operations attributable to SPX Corporation common shareholders for calculating basic and diluted income per share |  |  |  |  |  |  |  |  |  |  |  | 80.3
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  | 44.3
Impairment of intangible assets |  |  |  |  |  |  |  |  |  |  |  | 15.0
Capital expenditures |  |  |  |  |  |  |  |  |  |  |  | 43.1
Professional fees and other costs incurred in connection with Spin Off |  |  |  |  |  |  |  |  |  |  |  | 30.8
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 | 160.3
Costs of products sold |  |  |  |  |  |  |  |  |  |  | 144.2 | 143.8
Selling, general and administrative |  |  |  |  |  |  |  |  |  |  | 31.4 | 37.9
Impairment of intangible assets |  |  |  |  |  |  |  |  |  |  | 0.0 | 13.7
Special charges (credits), net |  |  |  |  |  |  |  |  |  |  | (1.3) | 12.7
Other expense |  |  |  |  |  |  |  |  |  |  | (0.2) | (0.9)
Loss before taxes |  |  |  |  |  |  |  |  |  |  | (21.1) | (48.7)
Income tax benefit |  |  |  |  |  |  |  |  |  | 9.4 | 4.5 | 9.1
Loss from discontinued operations |  |  | $ 0.4 | $ 7.2 |  |  |  |  |  | 6.8 | (16.6) | (39.6)
Income before taxes |  |  |  |  |  |  |  |  |  | (2.6) | (107.0) | (48.7)
Income tax provision |  |  |  |  |  |  |  |  |  | 9.4 | 11.8 | 9.1
Income (loss) from discontinued operations, net of tax |  |  |  |  |  |  |  |  |  | $ 6.8 | (95.2) | (39.6)
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 2.0 | 2.2
Capital expenditures |  |  |  |  |  |  |  |  |  |  | $ 0.7 | $ 1.9

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