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GOODWILL AND INTANGIBLE ASSETS (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 30, 2019
Mar. 31, 2018
Goodwill [Line Items]    
Impairment charges $ 10.0 $ 0.0
Amortization of intangible assets 12.8 $ 13.6
Estimated amortization expense in 2017 50.9  
Customer Relationships    
Goodwill [Line Items]    
Impairment charges $ 4.9