XML 62 R52.htm IDEA: XBRL DOCUMENT v3.20.2
FAIR VALUE MEASUREMENTS Fair Value measurements (Investments) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 26, 2020
Sep. 28, 2019
Sep. 26, 2020
Sep. 28, 2019
Dec. 28, 2019
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Gain (Loss) on Investments $ 2.5 $ 0.9 $ 0.6 $ 2.5  
Fair Value, Inputs, Level 1 [Member]          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Investments $ 18.9 $ 18.2 $ 18.9 $ 18.2 $ 19.7