Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 29, 2024	Jul. 01, 2023	Jun. 29, 2024	Jul. 01, 2023	Dec. 30, 2023
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	$ 1,455,292	$ 1,757,621	$ 2,875,591	$ 3,548,793
Cost of sales and operating expenses	1,128,421	1,359,702	2,245,087	2,726,675
Gross margin			630,504	822,118
Gain on sale of assets	222	259	(352)	(68)
Selling, general and administrative expenses	129,731	136,751	268,874	272,217
Restructuring and asset impairment charges	0	896	0	5,420
Acquisition and integration costs	1,130	1,706	5,184	8,728
Change in fair value of contingent consideration	(33,122)	(7,499)	(58,371)	(7,499)
Depreciation and amortization	124,605	122,086	252,114	238,092
Equity in net income of Diamond Green Diesel	44,197	212,964	122,616	307,301
Operating income	148,502	356,684	285,671	612,529
Equity in net income of other unconsolidated subsidiaries	3,017	1,849	5,327	1,969
Segment income/(loss)			290,998	614,498
Total other expense	(69,380)	(62,624)	(123,364)	(101,760)
Income before income taxes	82,139	295,909	167,634	512,738
Segment Assets	10,620,649		10,620,649		$ 11,061,084
Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	1,455,292	1,757,621
Cost of sales and operating expenses	1,128,421	1,359,702
Gross margin	326,871	397,919
Gain on sale of assets	222	259
Selling, general and administrative expenses	129,731	136,751
Restructuring and asset impairment charges		896
Acquisition and integration costs	1,130	1,706
Change in fair value of contingent consideration	(33,122)	(7,499)
Depreciation and amortization	124,605	122,086
Equity in net income of Diamond Green Diesel	44,197	212,964
Operating income	148,502	356,684
Equity in net income of other unconsolidated subsidiaries	3,017	1,849
Segment income/(loss)	151,519	358,533
Feed Ingredients
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	934,147	1,141,661	1,823,995	2,379,155
Cost of sales and operating expenses	737,871	876,413	1,443,640	1,826,485
Gross margin	196,276	265,248	380,355	552,670
Gain on sale of assets	205	322	337	(20)
Selling, general and administrative expenses	74,015	77,406	151,153	152,097
Restructuring and asset impairment charges		0		92
Acquisition and integration costs	0	0	0	0
Change in fair value of contingent consideration	(33,122)	(7,499)	(58,371)	(7,499)
Depreciation and amortization	86,444	82,575	174,013	172,895
Equity in net income of Diamond Green Diesel	0	0	0	0
Operating income	68,734	112,444	113,223	235,105
Equity in net income of other unconsolidated subsidiaries	3,017	1,849	5,327	1,969
Segment income/(loss)	71,751	114,293	118,550	237,074
Segment Assets	4,367,740		4,367,740		4,702,593
Food Ingredients
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	378,841	476,093	770,123	872,485
Cost of sales and operating expenses	276,760	371,095	574,905	661,210
Gross margin	102,081	104,998	195,218	211,275
Gain on sale of assets	37	2	(257)	(19)
Selling, general and administrative expenses	28,844	33,684	60,588	66,806
Restructuring and asset impairment charges		896		5,328
Acquisition and integration costs	0	0	0	0
Change in fair value of contingent consideration	0	0	0	0
Depreciation and amortization	27,372	28,445	56,240	42,918
Equity in net income of Diamond Green Diesel	0	0	0	0
Operating income	45,828	41,971	78,647	96,242
Equity in net income of other unconsolidated subsidiaries	0	0	0	0
Segment income/(loss)	45,828	41,971	78,647	96,242
Segment Assets	2,277,464		2,277,464		2,646,702
Fuel Ingredients
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	142,304	139,867	281,473	297,153
Cost of sales and operating expenses	113,790	112,194	226,542	238,980
Gross margin	28,514	27,673	54,931	58,173
Gain on sale of assets	(20)	(65)	(432)	(29)
Selling, general and administrative expenses	8,409	4,971	17,154	11,163
Restructuring and asset impairment charges		0		0
Acquisition and integration costs	0	0	0	0
Change in fair value of contingent consideration	0	0	0	0
Depreciation and amortization	8,723	8,567	17,390	16,960
Equity in net income of Diamond Green Diesel	44,197	212,964	122,616	307,301
Operating income	55,599	227,164	143,435	337,380
Equity in net income of other unconsolidated subsidiaries	0	0	0	0
Segment income/(loss)	55,599	227,164	143,435	337,380
Segment Assets	2,684,602		2,684,602		2,589,145
Corporate
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	0	0	0	0
Cost of sales and operating expenses	0	0	0	0
Gross margin	0	0	0	0
Gain on sale of assets	0	0	0	0
Selling, general and administrative expenses	18,463	20,690	39,979	42,151
Restructuring and asset impairment charges		0		0
Acquisition and integration costs	1,130	1,706	5,184	8,728
Change in fair value of contingent consideration	0	0	0	0
Depreciation and amortization	2,066	2,499	4,471	5,319
Equity in net income of Diamond Green Diesel	0	0	0	0
Operating income	(21,659)	(24,895)	(49,634)	(56,198)
Equity in net income of other unconsolidated subsidiaries	0	0	0	0
Segment income/(loss)	(21,659)	$ (24,895)	(49,634)	$ (56,198)
Segment Assets	$ 1,290,843		$ 1,290,843		$ 1,122,644