STOCKHOLDERS' EQUITY - Schedule of Reclassification from Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
Amortization of defined benefit pension and other postretirement plan actuarial losses:
Cost of sales	$ 2,475,221	$ 2,562,491	$ 4,980,957	$ 5,021,504
Interest income	(3,444)	(4,834)	(6,784)	(6,424)
Amortization of defined benefit pension and other postretirement plan actuarial losses	$ 88,357	$ 87,975	170,281	173,258
Total before tax			(176)	(174)
Tax benefit			84	(73)
Net income			(92)	(247)
Amount Reclassified from Accumulated Other Comprehensive Loss
Amortization of defined benefit pension and other postretirement plan actuarial losses:
Cost of sales			173	(472)
Interest income			307	899
Amount Reclassified from Accumulated Other Comprehensive Loss | Union Plan
Amortization of defined benefit pension and other postretirement plan actuarial losses:
Cost of sales			(36)	(24)
Amount Reclassified from Accumulated Other Comprehensive Loss | Legacy Gold Kist Plans
Amortization of defined benefit pension and other postretirement plan actuarial losses:
Cost of sales			(193)	(180)
Amortization of defined benefit pension and other postretirement plan actuarial losses			$ (427)	$ (397)