Revenue Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Net sales	$ 1,421,891	$ 1,625,204	$ 4,297,482	$ 5,173,997
Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	927,457	1,047,796	2,751,452	3,426,950
Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	357,292	455,744	1,127,415	1,328,229
Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	137,142	121,664	418,615	418,818
North America
Disaggregation of Revenue [Line Items]
Net sales	818,039	995,087	2,437,292	3,167,683
North America | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	720,381	872,493	2,132,009	2,844,350
North America | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	97,658	122,594	305,283	323,333
North America | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Europe
Disaggregation of Revenue [Line Items]
Net sales	394,397	401,839	1,219,996	1,322,775
Europe | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	95,625	86,007	304,195	292,323
Europe | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	161,630	194,168	497,186	611,634
Europe | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	137,142	121,664	418,615	418,818
China
Disaggregation of Revenue [Line Items]
Net sales	62,416	78,873	198,648	239,161
China | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	8,910	9,748	21,747	21,251
China | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	53,506	69,125	176,901	217,910
China | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
South America
Disaggregation of Revenue [Line Items]
Net sales	131,169	127,440	392,369	376,549
South America | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	98,980	75,801	282,733	259,633
South America | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	32,189	51,639	109,636	116,916
South America | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Other
Disaggregation of Revenue [Line Items]
Net sales	15,870	21,965	49,177	67,829
Other | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	3,561	3,747	10,768	9,393
Other | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	12,309	18,218	38,409	58,436
Other | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Fats
Disaggregation of Revenue [Line Items]
Net sales	387,852	456,098	1,090,138	1,434,898
Fats | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	346,870	417,856	972,792	1,313,461
Fats | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	40,982	38,242	117,346	121,437
Fats | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Used cooking oil
Disaggregation of Revenue [Line Items]
Net sales	81,674	103,135	253,600	387,103
Used cooking oil | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	81,674	103,135	253,600	387,103
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	369,544	405,411	1,119,700	1,288,514
Proteins | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	369,544	405,411	1,119,700	1,288,514
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	47,696	63,192	141,100	205,388
Bakery | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	47,696	63,192	141,100	205,388
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	69,658	42,659	225,900	182,738
Other rendering | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	69,658	42,659	225,900	182,738
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	289,311	390,695	935,659	1,122,143
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	289,311	390,695	935,659	1,122,143
Food ingredients | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Bioenergy
Disaggregation of Revenue [Line Items]
Net sales	137,142	121,664	418,615	418,818
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	137,142	121,664	418,615	418,818
Other
Disaggregation of Revenue [Line Items]
Net sales	39,014	42,350	112,770	134,395
Other | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	12,015	15,543	38,360	49,746
Other | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	26,999	26,807	74,410	84,649
Other | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	$ 0	$ 0	$ 0	$ 0