Revenue Disaggregation of revenues (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2024	Dec. 30, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Total net sales	$ 5,715,175	$ 6,788,080	$ 6,532,204
North America
Disaggregation of Revenue [Line Items]
Total net sales	3,249,871	4,165,712	4,222,058
Europe
Disaggregation of Revenue [Line Items]
Total net sales	1,627,060	1,691,449	1,769,973
China
Disaggregation of Revenue [Line Items]
Total net sales	266,468	308,572	284,684
South America
Disaggregation of Revenue [Line Items]
Total net sales	504,516	534,082	187,343
Other Geographical Areas [Member]
Disaggregation of Revenue [Line Items]
Total net sales	67,260	88,265	68,146
Fats [Member]
Disaggregation of Revenue [Line Items]
Total net sales	1,464,012	1,904,079	2,156,857
Used Cooking Oil [Member]
Disaggregation of Revenue [Line Items]
Total net sales	351,309	497,657	519,119
Proteins [Member]
Disaggregation of Revenue [Line Items]
Total net sales	1,484,581	1,672,027	1,476,553
Bakery [Member]
Disaggregation of Revenue [Line Items]
Total net sales	190,462	255,214	333,442
Other Rendering [Member]
Disaggregation of Revenue [Line Items]
Total net sales	293,648	243,525	200,945
Food Ingredients, Products and Services [Member]
Disaggregation of Revenue [Line Items]
Total net sales	1,232,521	1,476,875	1,121,995
Bioenergy [Member]
Disaggregation of Revenue [Line Items]
Total net sales	550,465	563,423	533,574
Other, Products And Services [Member]
Disaggregation of Revenue [Line Items]
Total net sales	148,177	175,280	189,719
Food Ingredients
Disaggregation of Revenue [Line Items]
Total net sales	1,489,101	1,752,065	1,459,630
Food Ingredients | North America
Disaggregation of Revenue [Line Items]
Total net sales	402,693	469,289	369,499
Food Ingredients | Europe
Disaggregation of Revenue [Line Items]
Total net sales	661,756	754,846	733,967
Food Ingredients | China
Disaggregation of Revenue [Line Items]
Total net sales	238,059	281,139	259,584
Food Ingredients | South America
Disaggregation of Revenue [Line Items]
Total net sales	134,757	171,425	40,661
Food Ingredients | Other Geographical Areas [Member]
Disaggregation of Revenue [Line Items]
Total net sales	51,836	75,366	55,919
Food Ingredients | Fats [Member]
Disaggregation of Revenue [Line Items]
Total net sales	160,184	164,730	205,674
Food Ingredients | Used Cooking Oil [Member]
Disaggregation of Revenue [Line Items]
Total net sales	0	0	0
Food Ingredients | Proteins [Member]
Disaggregation of Revenue [Line Items]
Total net sales	0	0	0
Food Ingredients | Bakery [Member]
Disaggregation of Revenue [Line Items]
Total net sales	0	0	0
Food Ingredients | Other Rendering [Member]
Disaggregation of Revenue [Line Items]
Total net sales	0	0	0
Food Ingredients | Food Ingredients, Products and Services [Member]
Disaggregation of Revenue [Line Items]
Total net sales	1,232,521	1,476,875	1,121,995
Food Ingredients | Bioenergy [Member]
Disaggregation of Revenue [Line Items]
Total net sales	0	0	0
Food Ingredients | Other, Products And Services [Member]
Disaggregation of Revenue [Line Items]
Total net sales	96,396	110,460	131,961
Fuel Ingredients
Disaggregation of Revenue [Line Items]
Total net sales	550,465	563,423	533,574
Fuel Ingredients | North America
Disaggregation of Revenue [Line Items]
Total net sales	0	0	0
Fuel Ingredients | Europe
Disaggregation of Revenue [Line Items]
Total net sales	550,465	563,423	533,574
Fuel Ingredients | China
Disaggregation of Revenue [Line Items]
Total net sales	0	0	0
Fuel Ingredients | South America
Disaggregation of Revenue [Line Items]
Total net sales	0	0	0
Fuel Ingredients | Other Geographical Areas [Member]
Disaggregation of Revenue [Line Items]
Total net sales	0	0	0
Fuel Ingredients | Fats [Member]
Disaggregation of Revenue [Line Items]
Total net sales	0	0	0
Fuel Ingredients | Used Cooking Oil [Member]
Disaggregation of Revenue [Line Items]
Total net sales	0	0	0
Fuel Ingredients | Proteins [Member]
Disaggregation of Revenue [Line Items]
Total net sales	0	0	0
Fuel Ingredients | Bakery [Member]
Disaggregation of Revenue [Line Items]
Total net sales	0	0	0
Fuel Ingredients | Other Rendering [Member]
Disaggregation of Revenue [Line Items]
Total net sales	0	0	0
Fuel Ingredients | Food Ingredients, Products and Services [Member]
Disaggregation of Revenue [Line Items]
Total net sales	0	0	0
Fuel Ingredients | Bioenergy [Member]
Disaggregation of Revenue [Line Items]
Total net sales	550,465	563,423	533,574
Fuel Ingredients | Other, Products And Services [Member]
Disaggregation of Revenue [Line Items]
Total net sales	0	0	0
Feed Ingredients
Disaggregation of Revenue [Line Items]
Total net sales	3,675,609	4,472,592	4,539,000
Feed Ingredients | North America
Disaggregation of Revenue [Line Items]
Total net sales	2,847,178	3,696,423	3,852,559
Feed Ingredients | Europe
Disaggregation of Revenue [Line Items]
Total net sales	414,839	373,180	502,432
Feed Ingredients | China
Disaggregation of Revenue [Line Items]
Total net sales	28,409	27,433	25,100
Feed Ingredients | South America
Disaggregation of Revenue [Line Items]
Total net sales	369,759	362,657	146,682
Feed Ingredients | Other Geographical Areas [Member]
Disaggregation of Revenue [Line Items]
Total net sales	15,424	12,899	12,227
Feed Ingredients | Fats [Member]
Disaggregation of Revenue [Line Items]
Total net sales	1,303,828	1,739,349	1,951,183
Feed Ingredients | Used Cooking Oil [Member]
Disaggregation of Revenue [Line Items]
Total net sales	351,309	497,657	519,119
Feed Ingredients | Proteins [Member]
Disaggregation of Revenue [Line Items]
Total net sales	1,484,581	1,672,027	1,476,553
Feed Ingredients | Bakery [Member]
Disaggregation of Revenue [Line Items]
Total net sales	190,462	255,214	333,442
Feed Ingredients | Other Rendering [Member]
Disaggregation of Revenue [Line Items]
Total net sales	293,648	243,525	200,945
Feed Ingredients | Food Ingredients, Products and Services [Member]
Disaggregation of Revenue [Line Items]
Total net sales	0	0	0
Feed Ingredients | Bioenergy [Member]
Disaggregation of Revenue [Line Items]
Total net sales	0	0	0
Feed Ingredients | Other, Products And Services [Member]
Disaggregation of Revenue [Line Items]
Total net sales	$ 51,781	$ 64,820	$ 57,758