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FAIR VALUE MEASUREMENTS - Investments (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jul. 03, 2021
Jun. 27, 2020
Jul. 03, 2021
Jun. 27, 2020
Jan. 02, 2021
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Gain (Loss) on Investments $ 1.1 $ 1.1 $ 1.3 $ (1.9)  
Fair Value, Inputs, Level 1 [Member]          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Investments $ 16.5 $ 16.4 $ 16.5 $ 16.4 $ 20.2