FAIR VALUE - Additional Information (Details) - USD ($) $ in Millions		3 Months Ended	9 Months Ended
	Sep. 29, 2017	Jul. 03, 2020	Jul. 03, 2020	Jun. 28, 2019	Sep. 27, 2019
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impairment charge			$ 49.7	$ 50.6
Equity investments in privately-held companies		$ 56.4	56.4		$ 64.2
Fair value increases recognized in other income, net		4.8
Equity investment		47.0	47.0
Unrealized gain on equity securities		20.9
MPTC Bonds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impairment charges on loans		8.3
APTC securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impairment charges on loans		0.9
Notes Receivable
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Long-term notes receivable		35.8	35.8		33.6
C P T C
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impairment charges on loans	$ 51.4
CPTC Loans		$ 11.8	11.8		$ 50.5
Impairment charge			$ 40.5
Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative, term of contract			1 month
Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative, term of contract			15 months