Revenue Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2022	Jul. 03, 2021	Jul. 02, 2022	Jul. 03, 2021
Disaggregation of Revenue [Line Items]
Net sales	$ 1,650,188	$ 1,198,669	$ 3,016,522	$ 2,245,385
Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	1,170,347	771,932	2,049,785	1,423,376
Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	369,181	317,031	723,995	615,096
Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	110,660	109,706	242,742	206,913
North America
Disaggregation of Revenue [Line Items]
Net sales	1,119,625	739,702	1,959,363	1,353,007
North America | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	1,028,244	660,513	1,784,082	1,209,528
North America | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	91,381	79,165	175,281	140,105
North America | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	24	0	3,374
Europe
Disaggregation of Revenue [Line Items]
Net sales	429,772	379,733	858,327	726,598
Europe | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	132,247	104,397	246,710	202,042
Europe | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	186,865	165,654	368,875	321,017
Europe | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	110,660	109,682	242,742	203,539
China
Disaggregation of Revenue [Line Items]
Net sales	71,258	55,838	144,201	115,708
China | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	6,932	3,746	13,568	5,684
China | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	64,326	52,092	130,633	110,024
China | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
South America
Disaggregation of Revenue [Line Items]
Net sales	12,868	5,590	21,364	16,044
South America | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
South America | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	12,868	5,590	21,364	16,044
South America | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Other
Disaggregation of Revenue [Line Items]
Net sales	16,665	17,806	33,267	34,028
Other | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	2,924	3,276	5,425	6,122
Other | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	13,741	14,530	27,842	27,906
Other | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Fats
Disaggregation of Revenue [Line Items]
Net sales	552,092	333,670	972,750	604,109
Fats | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	498,914	292,559	867,308	521,565
Fats | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	53,178	41,111	105,442	82,544
Fats | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Used cooking oil
Disaggregation of Revenue [Line Items]
Net sales	152,737	86,437	247,633	137,466
Used cooking oil | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	152,737	86,437	247,633	137,466
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	351,125	258,391	621,312	513,898
Proteins | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	351,125	258,391	621,312	513,898
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	89,593	79,202	168,104	142,307
Bakery | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	89,593	79,202	168,104	142,307
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	64,123	45,452	121,667	88,409
Other rendering | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	64,123	45,452	121,667	88,409
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	280,435	239,622	550,951	469,164
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	280,435	239,622	550,951	469,164
Food ingredients | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Bioenergy
Disaggregation of Revenue [Line Items]
Net sales	110,660	109,682	242,742	203,539
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	110,660	109,682	242,742	203,539
Biofuels
Disaggregation of Revenue [Line Items]
Net sales		24	0	3,374
Biofuels | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales		0	0	0
Biofuels | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales		0	0	0
Biofuels | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales		24	0	3,374
Other
Disaggregation of Revenue [Line Items]
Net sales	49,423	46,189	91,363	83,119
Other | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	13,855	9,891	23,761	19,731
Other | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	35,568	36,298	67,602	63,388
Other | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	$ 0	$ 0	$ 0	$ 0