DEBT - Schedule of Long-term Debt and Other Borrowing Arrangements (Details) - USD ($)			6 Months Ended
	Dec. 14, 2018	Jun. 02, 2018	Jun. 28, 2020	Dec. 29, 2019	Sep. 29, 2017	Mar. 11, 2015
Debt Instrument [Line Items]
Finance lease obligations			$ 1,907,000	$ 2,150,000
Long-term debt			2,661,392,000	2,324,626,000
Less: Current maturities of long-term debt			(25,566,000)	(26,392,000)
Long-term debt, less current maturities			2,635,826,000	2,298,234,000
Less: Capitalized financing costs			(19,875,000)	(22,205,000)
Long-term debt, less current maturities, net of capitalized financing costs			2,615,951,000	2,276,029,000
Credit facility | Term note payable at 1.42%
Debt Instrument [Line Items]
Long-term debt			462,500,000	475,000,000
Credit facility | Revolving note payable at 1.44%
Debt Instrument [Line Items]
Long-term debt			350,000,000	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 | Mexico Credit Facility (defined below) with notes payable at TIIE plus 1.50%
Debt Instrument [Line Items]
Long-term debt			$ 0	0
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			$ 1,001,894,000	1,002,095,000
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			$ 844,792,000	844,433,000
Credit facility | Credit facility | Term note payable at 1.42%
Debt Instrument [Line Items]
Stated interest rate			1.42%
Long-term debt			$ 462,500,000
Credit facility | Credit facility | Revolving note payable at 1.44%
Debt Instrument [Line Items]
Stated interest rate			1.44%
Credit facility | 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
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%	1.25%
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%	2.00%
Credit facility | Credit facility | Mexico Credit Facility (defined below) with notes payable at TIIE plus 1.50%
Debt Instrument [Line Items]
Long-term debt			$ 0
Credit facility | Credit facility | Mexico Credit Facility (defined below) with notes payable at TIIE plus 1.50% | TIIE Rate
Debt Instrument [Line Items]
Basis spread on variable interest rate	1.50%		1.50%
Secured loans with payables at weighted average of 3.34%
Debt Instrument [Line Items]
Weighted average interest rate			3.34%
Long-term debt			$ 136,000	948,000
Other debt
Debt Instrument [Line Items]
Long-term debt			$ 163,000	$ 0