Revenue Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2023	Jul. 02, 2022	Jul. 01, 2023	Jul. 02, 2022
Disaggregation of Revenue [Line Items]
Net sales	$ 1,757,621	$ 1,650,188	$ 3,548,793	$ 3,016,522
Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	1,141,661	1,170,347	2,379,155	2,049,785
Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	476,093	369,181	872,485	723,995
Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	139,867	110,660	297,153	242,742
North America
Disaggregation of Revenue [Line Items]
Net sales	1,047,488	1,119,625	2,172,596	1,959,363
North America | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	946,100	1,028,244	1,971,857	1,784,082
North America | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	101,388	91,381	200,739	175,281
North America | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Europe
Disaggregation of Revenue [Line Items]
Net sales	463,124	429,772	920,935	858,327
Europe | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	96,064	132,247	206,316	246,710
Europe | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	227,193	186,865	417,466	368,875
Europe | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	139,867	110,660	297,153	242,742
China
Disaggregation of Revenue [Line Items]
Net sales	77,574	71,258	160,288	144,201
China | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	6,160	6,932	11,503	13,568
China | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	71,414	64,326	148,785	130,633
China | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
South America
Disaggregation of Revenue [Line Items]
Net sales	144,786	12,868	249,109	21,364
South America | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	90,293	0	183,832	0
South America | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	54,493	12,868	65,277	21,364
South America | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Other
Disaggregation of Revenue [Line Items]
Net sales	24,649	16,665	45,865	33,267
Other | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	3,044	2,924	5,647	5,425
Other | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	21,605	13,741	40,218	27,842
Other | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Fats
Disaggregation of Revenue [Line Items]
Net sales	443,494	552,092	978,800	972,750
Fats | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	405,287	498,914	895,605	867,308
Fats | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	38,207	53,178	83,195	105,442
Fats | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Used cooking oil
Disaggregation of Revenue [Line Items]
Net sales	146,275	152,737	283,968	247,633
Used cooking oil | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	146,275	152,737	283,968	247,633
Used cooking oil | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Used cooking oil | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Proteins
Disaggregation of Revenue [Line Items]
Net sales	435,956	351,125	883,103	621,312
Proteins | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	435,956	351,125	883,103	621,312
Proteins | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Proteins | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Bakery
Disaggregation of Revenue [Line Items]
Net sales	67,263	89,593	142,196	168,104
Bakery | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	67,263	89,593	142,196	168,104
Bakery | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Bakery | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Other rendering
Disaggregation of Revenue [Line Items]
Net sales	70,265	64,123	140,079	121,667
Other rendering | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	70,265	64,123	140,079	121,667
Other rendering | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Other rendering | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Food ingredients
Disaggregation of Revenue [Line Items]
Net sales	412,307	280,435	731,448	550,951
Food ingredients | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Food ingredients | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	412,307	280,435	731,448	550,951
Food ingredients | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Bioenergy
Disaggregation of Revenue [Line Items]
Net sales	139,867	110,660	297,153	242,742
Bioenergy | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Bioenergy | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Bioenergy | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	139,867	110,660	297,153	242,742
Other
Disaggregation of Revenue [Line Items]
Net sales	42,194	49,423	92,046	91,363
Other | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	16,615	13,855	34,204	23,761
Other | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	25,579	35,568	57,842	67,602
Other | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	$ 0	$ 0	$ 0	$ 0