Revenue Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Oct. 01, 2022	Sep. 30, 2023	Oct. 01, 2022
Disaggregation of Revenue [Line Items]
Net sales	$ 1,625,204	$ 1,747,599	$ 5,173,997	$ 4,764,121
Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	1,047,796	1,273,142	3,426,950	3,322,927
Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	455,744	347,902	1,328,229	1,071,897
Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	121,664	126,555	418,818	369,297
North America
Disaggregation of Revenue [Line Items]
Net sales	995,087	1,188,993	3,167,683	3,148,356
North America | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	872,493	1,098,417	2,844,350	2,882,499
North America | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	122,594	90,576	323,333	265,857
North America | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Europe
Disaggregation of Revenue [Line Items]
Net sales	401,839	410,839	1,322,775	1,269,166
Europe | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	86,007	114,646	292,323	361,356
Europe | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	194,168	169,638	611,634	538,513
Europe | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	121,664	126,555	418,818	369,297
China
Disaggregation of Revenue [Line Items]
Net sales	78,873	71,508	239,161	215,709
China | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	9,748	6,291	21,251	19,859
China | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	69,125	65,217	217,910	195,850
China | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
South America
Disaggregation of Revenue [Line Items]
Net sales	127,440	59,468	376,549	80,832
South America | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	75,801	50,679	259,633	50,679
South America | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	51,639	8,789	116,916	30,153
South America | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Other
Disaggregation of Revenue [Line Items]
Net sales	21,965	16,791	67,829	50,058
Other | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	3,747	3,109	9,393	8,534
Other | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	18,218	13,682	58,436	41,524
Other | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Fats
Disaggregation of Revenue [Line Items]
Net sales	456,098	590,910	1,434,898	1,563,660
Fats | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	417,856	543,333	1,313,461	1,410,641
Fats | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	38,242	47,577	121,437	153,019
Fats | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Used cooking oil
Disaggregation of Revenue [Line Items]
Net sales	103,135	163,523	387,103	411,156
Used cooking oil | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	103,135	163,523	387,103	411,156
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	405,411	413,759	1,288,514	1,035,071
Proteins | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	405,411	413,759	1,288,514	1,035,071
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	63,192	84,835	205,388	252,939
Bakery | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	63,192	84,835	205,388	252,939
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	42,659	51,117	182,738	172,784
Other rendering | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	42,659	51,117	182,738	172,784
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	390,695	269,928	1,122,143	820,879
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	390,695	269,928	1,122,143	820,879
Food ingredients | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Bioenergy
Disaggregation of Revenue [Line Items]
Net sales	121,664	126,555	418,818	369,297
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	121,664	126,555	418,818	369,297
Other
Disaggregation of Revenue [Line Items]
Net sales	42,350	46,972	134,395	138,335
Other | Feed Ingredients
Disaggregation of Revenue [Line Items]
Net sales	15,543	16,575	49,746	40,336
Other | Food Ingredients
Disaggregation of Revenue [Line Items]
Net sales	26,807	30,397	84,649	97,999
Other | Fuel Ingredients
Disaggregation of Revenue [Line Items]
Net sales	$ 0	$ 0	$ 0	$ 0