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FAIR VALUE (Details)
€ in Millions, $ in Millions
3 Months Ended
Mar. 30, 2019
USD ($)
Mar. 30, 2019
EUR (€)
Jan. 01, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 30, 2016
EUR (€)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Security at cost | $       $ 0.7  
Security at fair value | $ $ 20.3   $ 16.6    
Realized gain on fair value adjustment | $ 6.3        
Distribution | $ $ 2.6        
Discontinued Operations, Disposed of by Sale | Buyer | Balcke Durr Business          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Amount of guarantees | €   € 31.7     € 79.0
Discontinued Operations, Disposed of by Sale | Buyer | Bank and Surety Bonds | Balcke Durr Business          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Amount of guarantees | €   18.1     79.0
Discontinued Operations, Disposed of by Sale | Buyer | Balcke-Durr | Balcke Durr Business          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Cash collateral | €   3.0     4.0
Discontinued Operations, Disposed of by Sale | Buyer | mutares AG | Indemnification Agreement | Balcke Durr Business          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Amount of guarantees | €         € 5.0
Discontinued Operations, Disposed of by Sale | SPXC | mutares AG | Indemnification Agreement | Balcke Durr Business          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Amount of guarantees | €   € 5.0      
Accounting Standards Update 2016-01          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Cumulative effect of new accounting principle in period of adoption | $     $ 12.0