EMPLOYEE BENEFITS - Contributions (Details) (Pension plan)	12 Months Ended
	Dec. 28, 2014	Dec. 29, 2013
Equity securities
Contributions and Cash Flows [Line Items]
Target Allocation (as a percent)	61.00%	60.00%
Debt securities
Contributions and Cash Flows [Line Items]
Target Allocation (as a percent)	33.00%	28.00%
Real estate
Contributions and Cash Flows [Line Items]
Target Allocation (as a percent)	6.00%	7.00%
Commodities
Contributions and Cash Flows [Line Items]
Target Allocation (as a percent)		5.00%
Minimum
Contributions and Cash Flows [Line Items]
Investment horizon of plan assets	10 years