Revenue Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Disaggregation of Revenue [Line Items]
Net sales	$ 1,420,299	$ 1,791,172
Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	889,848	1,237,494
Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	391,282	396,392
Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	139,169	157,286
North America
Disaggregation of Revenue [Line Items]
Net sales	798,910	1,125,108
North America | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	691,846	1,025,757
North America | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	107,064	99,351
North America | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Europe
Disaggregation of Revenue [Line Items]
Net sales	409,415	457,811
Europe | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	100,793	110,252
Europe | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	169,453	190,273
Europe | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	139,169	157,286
China
Disaggregation of Revenue [Line Items]
Net sales	66,247	82,714
China | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	4,778	5,343
China | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	61,469	77,371
China | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
South America
Disaggregation of Revenue [Line Items]
Net sales	129,118	104,323
South America | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	88,845	93,539
South America | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	40,273	10,784
South America | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Other
Disaggregation of Revenue [Line Items]
Net sales	16,609	21,216
Other | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	3,586	2,603
Other | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	13,023	18,613
Other | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Fats
Disaggregation of Revenue [Line Items]
Net sales	349,537	535,306
Fats | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	311,247	490,318
Fats | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	38,290	44,988
Fats | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Used cooking oil
Disaggregation of Revenue [Line Items]
Net sales	75,800	137,693
Used cooking oil | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	75,800	137,693
Used cooking oil | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Used cooking oil | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Proteins
Disaggregation of Revenue [Line Items]
Net sales	367,600	447,147
Proteins | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	367,600	447,147
Proteins | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Proteins | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Bakery
Disaggregation of Revenue [Line Items]
Net sales	44,900	74,933
Bakery | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	44,900	74,933
Bakery | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Bakery | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Other rendering
Disaggregation of Revenue [Line Items]
Net sales	76,701	69,814
Other rendering | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	76,701	69,814
Other rendering | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Other rendering | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Food ingredients
Disaggregation of Revenue [Line Items]
Net sales	331,031	319,141
Food ingredients | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Food ingredients | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	331,031	319,141
Food ingredients | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Bioenergy
Disaggregation of Revenue [Line Items]
Net sales	139,169	157,286
Bioenergy | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Bioenergy | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0
Bioenergy | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	139,169	157,286
Other
Disaggregation of Revenue [Line Items]
Net sales	35,561	49,852
Other | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	13,600	17,589
Other | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	21,961	32,263
Other | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	$ 0	$ 0