MARKET RISKS AND CONCENTRATIONS (Details) $ in Millions	12 Months Ended
	Dec. 27, 2015 USD ($) location	Dec. 28, 2014 USD ($)
Concentration Risk [Line Items]
Collective bargaining agreements, locations not covered	4
Period over which there have been no labor-related work stoppages	10 years
Collective bargaining agreements, number of locations currently in negotiations	4
Aggregate carrying amount of net assets | $	$ 576.6	$ 454.5
Trade accounts and other receivables [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	8.20%
Net sales [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	7.80%
Workforce subject to collective bargaining agreements [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	45.60%