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Contingent Liabilities and Other Matters - General (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Loss Contingencies [Line Items] |  |  |
Carrying values of accruals | $ 575.7 | $ 592.4 |
Proceeds from insurance recoveries | 35.4 | 47.1 | $ 45.3
Payments for asbestos-related matters, net of insurance recoveries | 19.3 | 13.1 | 9.7
Recorded charges related to asbestos product liability matters | 21.3 | 10.1 | 4.8
Gain (Loss) on Disposition of Discontinued Operations, Net of Tax |  |  |
Loss Contingencies [Line Items] |  |  |
Recorded charges related to asbestos product liability matters | 2.1 | 3.8 | 0.4
Income From Continuing Operations Before Income Taxes |  |  |
Loss Contingencies [Line Items] |  |  |
Recorded charges related to asbestos product liability matters | 19.2 | 6.3 | $ 4.4
Other Long Term Liabilities |  |  |
Loss Contingencies [Line Items] |  |  |
Accruals included in other long-term liabilities | 499.8 | 517.6 |
Other Long Term Liabilities | Asbestos Related Claims |  |  |
Loss Contingencies [Line Items] |  |  |
Accruals included in other long-term liabilities | $ 479.9 | $ 498.1 |
Buildings | SPX Flow, Inc | Discontinued Operations, Disposed of by Means Other than Sale, Spinoff |  |  |
Loss Contingencies [Line Items] |  |  |
Duration of office lease agreement | 5 years |  |
Annual lease costs | $ 2.1 |  |

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