PENSION AND OTHER POSTRETIREMENT BENEFITS - Schedule of Economic Assumptions, and Impact of Change in Discount Rate on Benefit Obligation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 26, 2021	Dec. 27, 2020	Dec. 29, 2019
Net pension and other postretirement cost:
Increase in Discount Rate of 0.25% - impact on defined benefit obligation for pension benefits	$ (9,986)
Decrease in Discount Rate of 0.25% - impact on defined benefit obligation for pension benefits	$ 10,513
Pension Benefits
Benefit obligation:
Discount rate	2.23%	1.83%	2.56%
Net pension and other postretirement cost:
Discount rate	2.08%	2.16%	3.10%
Expected return on plan assets	3.53%	4.34%	4.62%
Other Benefits
Benefit obligation:
Discount rate	2.38%	1.80%	2.77%
Net pension and other postretirement cost:
Discount rate	1.80%	2.77%	4.07%