MARKET RISKS AND CONCENTRATIONS (Details) $ in Millions	12 Months Ended
	Dec. 27, 2020 USD ($) employee	Dec. 29, 2019 USD ($)
Concentration Risk [Line Items]
Period over which there have been no labor-related work stoppages	10 years
U.S.
Concentration Risk [Line Items]
Number of employees	30,900
Mexico
Concentration Risk [Line Items]
Number of employees	10,500
Aggregate carrying amount of net assets | $	$ 922.5	$ 873.9
U.K. and Europe
Concentration Risk [Line Items]
Number of employees	15,000
Aggregate carrying amount of net assets | $	$ 2,300.0	$ 2,100.0
Net sales
Concentration Risk [Line Items]
Concentration risk, percentage	6.90%
Workforce subject to collective bargaining agreements
Concentration Risk [Line Items]
Concentration risk, percentage	35.20%