REVENUE RECOGNITION - Disaggregated Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2021	Sep. 27, 2020	Sep. 26, 2021	Sep. 27, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 3,827,566	$ 3,075,121	$ 10,738,689	$ 8,974,072
Chicken
Disaggregation of Revenue [Line Items]
Revenue	3,472,834	2,733,341	9,656,980	7,974,974
Chicken, Fresh
Disaggregation of Revenue [Line Items]
Revenue	2,503,390	2,126,098	7,111,916	6,106,366
Chicken, Prepared
Disaggregation of Revenue [Line Items]
Revenue	541,247	376,318	1,461,681	1,124,137
Chicken, Export
Disaggregation of Revenue [Line Items]
Revenue	200,884	121,654	570,416	379,851
Chicken, Other
Disaggregation of Revenue [Line Items]
Revenue	227,313	109,271	512,967	364,620
Chicken and Pork, Export
Disaggregation of Revenue [Line Items]
Revenue	221,896	140,032	625,905	432,372
Chicken and Pork, Other
Disaggregation of Revenue [Line Items]
Revenue	239,205	130,043	538,771	419,034
U.S. | Chicken
Disaggregation of Revenue [Line Items]
Revenue	2,466,850	1,894,222	6,714,879	5,619,791
U.S. | Chicken, Fresh
Disaggregation of Revenue [Line Items]
Revenue	1,931,953	1,590,003	5,337,016	4,584,162
U.S. | Chicken, Prepared
Disaggregation of Revenue [Line Items]
Revenue	235,763	163,604	637,344	535,960
U.S. | Chicken, Export
Disaggregation of Revenue [Line Items]
Revenue	117,454	58,871	347,269	215,194
U.S. | Chicken, Other
Disaggregation of Revenue [Line Items]
Revenue	181,680	81,744	393,250	284,475
U.K. and Europe | Chicken
Disaggregation of Revenue [Line Items]
Revenue	575,708	503,897	1,639,310	1,426,042
U.K. and Europe | Chicken, Fresh
Disaggregation of Revenue [Line Items]
Revenue	195,967	221,862	624,414	678,369
U.K. and Europe | Chicken, Prepared
Disaggregation of Revenue [Line Items]
Revenue	274,275	201,884	735,985	533,862
U.K. and Europe | Chicken, Export
Disaggregation of Revenue [Line Items]
Revenue	83,430	62,783	223,147	164,657
U.K. and Europe | Chicken, Other
Disaggregation of Revenue [Line Items]
Revenue	22,036	17,368	55,764	49,154
U.K. and Europe | Pork
Disaggregation of Revenue [Line Items]
Revenue	354,732	341,780	1,081,709	999,098
U.K. and Europe | Pork, Fresh
Disaggregation of Revenue [Line Items]
Revenue	52,265	176,667	290,673	509,663
U.K. and Europe | Pork, Prepared
Disaggregation of Revenue [Line Items]
Revenue	269,563	125,963	709,743	382,500
U.K. and Europe | Pork, Export
Disaggregation of Revenue [Line Items]
Revenue	21,012	18,378	55,489	52,521
U.K. and Europe | Pork, Other
Disaggregation of Revenue [Line Items]
Revenue	11,892	20,772	25,804	54,414
U.K. and Europe | Chicken and Pork, Fresh
Disaggregation of Revenue [Line Items]
Revenue	2,555,655	2,302,765	7,402,589	6,616,029
U.K. and Europe | Chicken and Pork, Prepared
Disaggregation of Revenue [Line Items]
Revenue	810,810	502,281	2,171,424	1,506,637
Mexico | Chicken
Disaggregation of Revenue [Line Items]
Revenue	430,276	335,222	1,302,791	929,141
Mexico | Chicken, Fresh
Disaggregation of Revenue [Line Items]
Revenue	375,470	314,233	1,150,486	843,835
Mexico | Chicken, Prepared
Disaggregation of Revenue [Line Items]
Revenue	31,209	10,830	88,352	54,315
Mexico | Chicken, Export
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Mexico | Chicken, Other
Disaggregation of Revenue [Line Items]
Revenue	$ 23,597	$ 10,159	$ 63,953	$ 30,991