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FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS (Investments) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Sep. 29, 2018
Sep. 30, 2017
Fair Value Disclosures [Abstract]        
Gain (Loss) on Investments $ 0.7 $ 0.4 $ 0.9 $ 1.6