MARKET RISKS AND CONCENTRATIONS (Details) $ in Millions	12 Months Ended
	Dec. 25, 2016 USD ($) employee location	Dec. 27, 2015 USD ($)
Concentration Risk [Line Items]
Number of employees	39,600
Collective bargaining agreements, number of locations not covered | location	3
Collective bargaining agreements, number of locations agreements have been reached | location	2
Period over which there have been no labor-related work stoppages	10 years
Aggregate carrying amount of net assets | $	$ 673.0	$ 576.6
United States [Member]
Concentration Risk [Line Items]
Number of employees	29,850
Mexico [Member]
Concentration Risk [Line Items]
Number of employees	9,750
Trade accounts and other receivables [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	9.40%
Net sales [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	7.30%
Workforce subject to collective bargaining agreements [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	42.90%