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CONTINGENT LIABILITIES AND OTHER MATTERS - Noncontrolling Interest in South African Subsidiary (Details) - South Africa - SPX Technologies - BEE Partner R in Millions, $ in Millions | Sep. 29, 2018 USD ($) | Sep. 29, 2018 ZAR (R) | Dec. 31, 2017 USD ($) | Jul. 06, 2016 ZAR (R)
--- | --- | --- | --- | ---
Contingent Liabilities and Other Matters |  |  |  |
Amount due from BEE Partner under promissory note |  |  |  | R 30.3
Put Option |  |  |  |
Contingent Liabilities and Other Matters |  |  |  |
Noncontrolling interest percentage | 25.10% | 25.10% |  |
Amount entitled for Put Option exercise |  |  |  | R 287.3
Net redemption value | $ 18.1 | R 257.0 | $ 20.9 |

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