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Revenue Disaggregation of revenues (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Jan. 01, 2022 | Jan. 02, 2021
Disaggregation of Revenue [Line Items] |  |  |
Net sales | $ 6,532,204 | $ 4,741,369 | $ 3,571,923
North America |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 4,222,058 | 2,867,934 | 1,960,503
Europe |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 1,769,973 | 1,521,031 | 1,296,668
China |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 284,684 | 253,212 | 202,093
South America |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 187,343 | 31,446 | 38,238
Other Geographical Areas [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 68,146 | 67,746 | 74,421
Fats [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 2,156,857 | 1,380,796 | 804,737
Used Cooking Oil [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 519,119 | 319,145 | 176,691
Proteins [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 1,476,553 | 1,022,694 | 830,195
Bakery [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 333,442 | 287,424 | 183,759
Other Rendering [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 200,945 | 173,405 | 178,601
Food Ingredients, Products and Services [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 1,121,995 | 961,617 | 947,928
Bioenergy [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 533,574 | 426,863 | 293,249
Biofuels [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales |  | 3,377 | 20,869
Other, Products And Services [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 189,719 | 166,048 | 135,894
Food Ingredients [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 1,459,630 | 1,271,629 | 1,185,701
Food Ingredients [Member] | North America |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 369,499 | 286,852 | 244,929
Food Ingredients [Member] | Europe |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 733,967 | 663,619 | 650,671
Food Ingredients [Member] | China |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 259,584 | 233,766 | 188,417
Food Ingredients [Member] | South America |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 40,661 | 31,446 | 38,238
Food Ingredients [Member] | Other Geographical Areas [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 55,919 | 55,946 | 63,446
Food Ingredients [Member] | Fats [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 205,674 | 182,674 | 142,963
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 | 1,121,995 | 961,617 | 947,928
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 | 131,961 | 127,338 | 94,810
Fuel Ingredients [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 533,574 | 430,240 | 314,118
Fuel Ingredients [Member] | North America |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 0 | 3,377 | 20,869
Fuel Ingredients [Member] | Europe |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 533,574 | 426,863 | 293,249
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 | 533,574 | 426,863 | 293,249
Fuel Ingredients [Member] | Biofuels [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales |  | 3,377 | 20,869
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 | 4,539,000 | 3,039,500 | 2,072,104
Feed Ingredients [Member] | North America |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 3,852,559 | 2,577,705 | 1,694,705
Feed Ingredients [Member] | Europe |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 502,432 | 430,549 | 352,748
Feed Ingredients [Member] | China |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 25,100 | 19,446 | 13,676
Feed Ingredients [Member] | South America |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 146,682 | 0 | 0
Feed Ingredients [Member] | Other Geographical Areas [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 12,227 | 11,800 | 10,975
Feed Ingredients [Member] | Fats [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 1,951,183 | 1,198,122 | 661,774
Feed Ingredients [Member] | Used Cooking Oil [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 519,119 | 319,145 | 176,691
Feed Ingredients [Member] | Proteins [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 1,476,553 | 1,022,694 | 830,195
Feed Ingredients [Member] | Bakery [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 333,442 | 287,424 | 183,759
Feed Ingredients [Member] | Other Rendering [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net sales | 200,945 | 173,405 | 178,601
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 | $ 57,758 | $ 38,710 | $ 41,084

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