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FAIR VALUE MEASUREMENTS Fair Value measurements (Hierarchy) (Details) - USD ($)
$ in Millions
Jun. 29, 2019
Dec. 29, 2018
Jun. 30, 2018
Fair Value, Inputs, Level 1 [Member]      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Investments $ 17.3 $ 15.7 $ 16.9