COMMITMENTS AND CONTINGENCIES (Narrative) (Details) - USD ($)		12 Months Ended
	Dec. 12, 2012	Dec. 27, 2015	Dec. 28, 2014	Dec. 29, 2013
Other Commitments [Line Items]
Outstanding purchase contracts, payable in 2016		$ 161,200,000
Outstanding purchase contracts, payable in 2017		700,000
Outstanding purchase contracts, payable in 2018		0
Rental expense for operating leases		25,300,000	$ 15,200,000	$ 13,100,000
Maximum potential amount of residual value guarantees		48,500,000
Due To Internal Revenue Service [Member]
Other Commitments [Line Items]
Asserted claims	$ 29,300,000	74,700,000
Due To Internal Revenue Service [Member] | Proceeding Accounts [Member]
Other Commitments [Line Items]
Asserted claims		45,400,000
JBS Wisconsin [Member]
Other Commitments [Line Items]
Amount agreed to reimburse JBS USA for draws that support obligations of the Company and its subsidiaries		$ 56,500,000
Minimum [Member]
Other Commitments [Line Items]
Operating leases, terms of lease maturities		1 year
Minimum [Member] | ERISA Litigation [Member]
Other Commitments [Line Items]
Asserted claims		$ 35,000,000
Maximum [Member]
Other Commitments [Line Items]
Operating leases, terms of lease maturities		10 years