Revenue Disaggregation of revenues (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2023	Dec. 31, 2022	Jan. 01, 2022
Disaggregation of Revenue [Line Items]
Net sales	$ 6,788,080	$ 6,532,204	$ 4,741,369
North America
Disaggregation of Revenue [Line Items]
Net sales	4,165,712	4,222,058	2,867,934
Europe
Disaggregation of Revenue [Line Items]
Net sales	1,691,449	1,769,973	1,521,031
China
Disaggregation of Revenue [Line Items]
Net sales	308,572	284,684	253,212
South America
Disaggregation of Revenue [Line Items]
Net sales	534,082	187,343	31,446
Other Geographical Areas [Member]
Disaggregation of Revenue [Line Items]
Net sales	88,265	68,146	67,746
Fats [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,904,079	2,156,857	1,380,796
Used Cooking Oil [Member]
Disaggregation of Revenue [Line Items]
Net sales	497,657	519,119	319,145
Proteins [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,672,027	1,476,553	1,022,694
Bakery [Member]
Disaggregation of Revenue [Line Items]
Net sales	255,214	333,442	287,424
Other Rendering [Member]
Disaggregation of Revenue [Line Items]
Net sales	243,525	200,945	173,405
Food Ingredients, Products and Services [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,476,875	1,121,995	961,617
Bioenergy [Member]
Disaggregation of Revenue [Line Items]
Net sales	563,423	533,574	426,863
Biofuels [Member]
Disaggregation of Revenue [Line Items]
Net sales		0	3,377
Other, Products And Services [Member]
Disaggregation of Revenue [Line Items]
Net sales	175,280	189,719	166,048
Food Ingredients [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,752,065	1,459,630	1,271,629
Food Ingredients [Member] | North America
Disaggregation of Revenue [Line Items]
Net sales	469,289	369,499	286,852
Food Ingredients [Member] | Europe
Disaggregation of Revenue [Line Items]
Net sales	754,846	733,967	663,619
Food Ingredients [Member] | China
Disaggregation of Revenue [Line Items]
Net sales	281,139	259,584	233,766
Food Ingredients [Member] | South America
Disaggregation of Revenue [Line Items]
Net sales	171,425	40,661	31,446
Food Ingredients [Member] | Other Geographical Areas [Member]
Disaggregation of Revenue [Line Items]
Net sales	75,366	55,919	55,946
Food Ingredients [Member] | Fats [Member]
Disaggregation of Revenue [Line Items]
Net sales	164,730	205,674	182,674
Food Ingredients [Member] | Used Cooking Oil [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
Food Ingredients [Member] | Proteins [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
Food Ingredients [Member] | Bakery [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
Food Ingredients [Member] | Other Rendering [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
Food Ingredients [Member] | Food Ingredients, Products and Services [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,476,875	1,121,995	961,617
Food Ingredients [Member] | Bioenergy [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
Food Ingredients [Member] | Biofuels [Member]
Disaggregation of Revenue [Line Items]
Net sales		0	0
Food Ingredients [Member] | Other, Products And Services [Member]
Disaggregation of Revenue [Line Items]
Net sales	110,460	131,961	127,338
Fuel Ingredients [Member]
Disaggregation of Revenue [Line Items]
Net sales	563,423	533,574	430,240
Fuel Ingredients [Member] | North America
Disaggregation of Revenue [Line Items]
Net sales	0	0	3,377
Fuel Ingredients [Member] | Europe
Disaggregation of Revenue [Line Items]
Net sales	563,423	533,574	426,863
Fuel Ingredients [Member] | China
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
Fuel Ingredients [Member] | South America
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
Fuel Ingredients [Member] | Other Geographical Areas [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
Fuel Ingredients [Member] | Fats [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
Fuel Ingredients [Member] | Used Cooking Oil [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
Fuel Ingredients [Member] | Proteins [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
Fuel Ingredients [Member] | Bakery [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
Fuel Ingredients [Member] | Other Rendering [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
Fuel Ingredients [Member] | Food Ingredients, Products and Services [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
Fuel Ingredients [Member] | Bioenergy [Member]
Disaggregation of Revenue [Line Items]
Net sales	563,423	533,574	426,863
Fuel Ingredients [Member] | Biofuels [Member]
Disaggregation of Revenue [Line Items]
Net sales		0	3,377
Fuel Ingredients [Member] | Other, Products And Services [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
Feed Ingredients [Member]
Disaggregation of Revenue [Line Items]
Net sales	4,472,592	4,539,000	3,039,500
Feed Ingredients [Member] | North America
Disaggregation of Revenue [Line Items]
Net sales	3,696,423	3,852,559	2,577,705
Feed Ingredients [Member] | Europe
Disaggregation of Revenue [Line Items]
Net sales	373,180	502,432	430,549
Feed Ingredients [Member] | China
Disaggregation of Revenue [Line Items]
Net sales	27,433	25,100	19,446
Feed Ingredients [Member] | South America
Disaggregation of Revenue [Line Items]
Net sales	362,657	146,682	0
Feed Ingredients [Member] | Other Geographical Areas [Member]
Disaggregation of Revenue [Line Items]
Net sales	12,899	12,227	11,800
Feed Ingredients [Member] | Fats [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,739,349	1,951,183	1,198,122
Feed Ingredients [Member] | Used Cooking Oil [Member]
Disaggregation of Revenue [Line Items]
Net sales	497,657	519,119	319,145
Feed Ingredients [Member] | Proteins [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,672,027	1,476,553	1,022,694
Feed Ingredients [Member] | Bakery [Member]
Disaggregation of Revenue [Line Items]
Net sales	255,214	333,442	287,424
Feed Ingredients [Member] | Other Rendering [Member]
Disaggregation of Revenue [Line Items]
Net sales	243,525	200,945	173,405
Feed Ingredients [Member] | Food Ingredients, Products and Services [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
Feed Ingredients [Member] | Bioenergy [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
Feed Ingredients [Member] | Biofuels [Member]
Disaggregation of Revenue [Line Items]
Net sales		0	0
Feed Ingredients [Member] | Other, Products And Services [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 64,820	$ 57,758	$ 38,710