PENSION AND OTHER POSTRETIREMENT BENEFITS - Schedule of Economic Assumptions and Impact of Change in Discount Rate on Benefit Obligation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2022	Mar. 28, 2021	Dec. 26, 2021
Assumptions used to measure net pension and other postretirement cost
Increase in Discount Rate of 0.25% - Impact on defined benefit obligation for pension benefits	$ (9,122)
Decrease in Discount Rate of 0.25% - Impact on defined benefit obligation for pension benefits	$ 9,604
Pension Benefits
Assumptions used to measure benefit obligation at end of period:
Discount rate	2.93%		2.23%
Assumptions used to measure net pension and other postretirement cost
Discount rate	2.23%	1.83%
Expected return on plan assets	3.40%	3.53%
Other Benefits
Assumptions used to measure benefit obligation at end of period:
Discount rate	3.15%		2.38%
Assumptions used to measure net pension and other postretirement cost
Discount rate	2.38%	1.80%