RETIREMENT AND POST RETIREMENT HEALTH CARE PLANS (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019	Dec. 28, 2019
Pension and Other Postretirement Benefits Cost (Reversal of Cost) [Abstract]
Estimated net actuarial loss to be amortized from accumulated other comprehensive loss	$ 1.2		$ 1.2
Estimated prior service cost to be amortized from accumulated other comprehensive loss	(0.6)		(0.6)
Contribution to defined benefit pension plans	1.2	$ 4.1	2.3	$ 4.9	$ 10.8
Expected total contribution to defined benefit pension plans	$ 10.6		$ 10.6