PENSION AND OTHER POSTRETIREMENT BENEFITS (Schedule of Plan Asset Allocations) (Details)	Dec. 25, 2016	Dec. 27, 2015
Defined Benefit Plan Disclosure [Line Items]
Total assets	100.00%	100.00%
Cash and cash equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets	0.00%	0.00%
Equity securities [Member] | Pooled separate accounts [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets	5.00%	7.00%
Equity securities [Member] | Common collective trusts funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets	60.00%	57.00%
Fixed income securities [Member] | Pooled separate accounts [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets	5.00%	7.00%
Fixed income securities [Member] | Common collective trusts funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total assets	30.00%	29.00%