DEBT - Schedule of Long-term Debt and Other Borrowing Arrangements (Details) - USD ($) $ in Thousands			12 Months Ended
	Dec. 14, 2018	Jun. 02, 2018	Dec. 27, 2020	Dec. 29, 2019	Sep. 29, 2017	Mar. 11, 2015
Debt Instrument [Line Items]
Finance lease obligations			$ 1,664	$ 2,150
Long-term debt			2,298,544	2,324,626
Less: Current maturities of long-term debt			(25,455)	(26,392)
Long-term debt, less current maturities			2,273,089	2,298,234
Less: Capitalized financing costs			(17,543)	(22,205)
Long-term debt, less current maturities, net of capitalized financing costs			2,255,546	2,276,029
Credit facility | Term note payable at 1.40%
Debt Instrument [Line Items]
Long-term debt			450,000	475,000
Credit facility | Revolving note payable at 1.39%
Debt Instrument [Line Items]
Long-term debt			0	0
Credit facility | Moy Park Bank of Ireland Revolving Facility with notes payable at LIBOR or EURIBOR plus 1.25% to 2.00%
Debt Instrument [Line Items]
Long-term debt			0	0
Credit facility | Moy Park Bank of Ireland Revolving Facility with notes payable at LIBOR or EURIBOR plus 1.25% to 2.00% | EURIBOR Rate
Debt Instrument [Line Items]
Basis spread on variable interest rate		2.00%
Credit facility | Moy Park Bank of Ireland Revolving Facility with notes payable at LIBOR or EURIBOR plus 1.25% to 2.00% | LIBOR Rate
Debt Instrument [Line Items]
Basis spread on variable interest rate		1.25%
Credit facility | Mexico Credit Facility (defined below) with notes payable at TIIE Rate plus 1.50%
Debt Instrument [Line Items]
Long-term debt			$ 0	0
Credit facility | Mexico Credit Facility (defined below) with notes payable at TIIE Rate plus 1.50% | TIIE Rate
Debt Instrument [Line Items]
Basis spread on variable interest rate	1.50%
Senior notes | Senior notes payable, net of premium and discount at 5.75%
Debt Instrument [Line Items]
Stated interest rate			5.75%			5.75%
Long-term debt			$ 1,001,693	1,002,095
Senior notes | Senior notes payable, net of discount at 5.875%
Debt Instrument [Line Items]
Stated interest rate			5.875%		5.875%
Long-term debt			$ 845,149	844,433
Credit facility | Credit facility | Term note payable at 1.40%
Debt Instrument [Line Items]
Stated interest rate			1.40%
Long-term debt			$ 450,000
Credit facility | Credit facility | Revolving note payable at 1.39%
Debt Instrument [Line Items]
Stated interest rate			1.39%
Credit facility | Credit facility | Moy Park Bank of Ireland Revolving Facility with notes payable at LIBOR or EURIBOR plus 1.25% to 2.00% | EURIBOR Rate
Debt Instrument [Line Items]
Basis spread on variable interest rate			2.00%
Credit facility | Credit facility | Moy Park Bank of Ireland Revolving Facility with notes payable at LIBOR or EURIBOR plus 1.25% to 2.00% | LIBOR Rate
Debt Instrument [Line Items]
Basis spread on variable interest rate			1.25%
Credit facility | Credit facility | Mexico Credit Facility (defined below) with notes payable at TIIE Rate plus 1.50% | TIIE Rate
Debt Instrument [Line Items]
Basis spread on variable interest rate			1.50%
Secured Loans
Debt Instrument [Line Items]
Weighted average interest rate			3.34%
Long-term debt			$ 38	$ 948