PENSION AND OTHER POSTRETIREMENT BENEFITS (Schedule of Economic Assumptions) (Details)	3 Months Ended
	Mar. 27, 2016	Mar. 29, 2015	Dec. 27, 2015
Pension Benefits [Member]
Assumptions used to measure benefit obligation at end of period:
Discount rate	4.18%		4.47%
Assumptions used to measure net pension and other postretirement cost:
Discount rate	4.47%	4.22%
Expected return on plan assets	5.50%	6.00%
Other Benefits [Member]
Assumptions used to measure benefit obligation at end of period:
Discount rate	3.55%		4.47%
Assumptions used to measure net pension and other postretirement cost:
Discount rate	4.47%	4.22%