Business Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2024	Dec. 30, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Total net sales	$ 5,715,175	$ 6,788,080	$ 6,532,204
Cost of sales and operating expenses	4,437,337	5,143,060	5,002,609
Gross Margin	1,277,838	1,645,020	1,529,595
Gain on sale of assets	(4,157)	(7,421)	(4,494)
Selling, general and administrative expenses	492,105	542,534	436,608
Restructuring Costs and Asset Impairment Charges	5,794	18,553	29,666
Depreciation and amortization	503,825	502,015	394,721
Acquisition and integration costs	7,842	13,884	16,372
Change in fair value of contingent consideration	(46,706)	(7,891)	0
Equity In net income of Diamond Green Diesel	149,082	366,380	372,346
Segment operating income/(loss)	468,217	949,726	1,029,068
Equity in net income of other unconsolidated subsidiaries	11,994	5,011	5,102
Segment income/(loss)	480,211	954,737	1,034,170
Total other expense (b)	(232,703)	(234,780)	(140,452)
Income before income taxes	247,508	719,957	893,718
Total assets	10,070,473	11,061,084
Interest income	16,000	16,400	5,300
Casualty Gain (Loss)	20,700	7,800	(4,600)
Other pension (expense) income excluding service cost	(1,800)	(1,500)	1,100
Other income/(expense)	(12,600)	(6,400)	(5,400)
Capital expenditures for the year ended:	332,465	555,480	391,309
Capital assets	37,400	155,500	588,800
North America
Segment Reporting Information [Line Items]
Total net sales	3,249,871	4,165,712	4,222,058
Europe
Segment Reporting Information [Line Items]
Total net sales	1,627,060	1,691,449	1,769,973
China
Segment Reporting Information [Line Items]
Total net sales	266,468	308,572	284,684
South America
Segment Reporting Information [Line Items]
Total net sales	504,516	534,082	187,343
Feed Ingredients
Segment Reporting Information [Line Items]
Total net sales	3,675,609	4,472,592	4,539,000
Feed Ingredients | North America
Segment Reporting Information [Line Items]
Total net sales	2,847,178	3,696,423	3,852,559
Feed Ingredients | Europe
Segment Reporting Information [Line Items]
Total net sales	414,839	373,180	502,432
Feed Ingredients | China
Segment Reporting Information [Line Items]
Total net sales	28,409	27,433	25,100
Feed Ingredients | South America
Segment Reporting Information [Line Items]
Total net sales	369,759	362,657	146,682
Food Ingredients
Segment Reporting Information [Line Items]
Total net sales	1,489,101	1,752,065	1,459,630
Food Ingredients | North America
Segment Reporting Information [Line Items]
Total net sales	402,693	469,289	369,499
Food Ingredients | Europe
Segment Reporting Information [Line Items]
Total net sales	661,756	754,846	733,967
Food Ingredients | China
Segment Reporting Information [Line Items]
Total net sales	238,059	281,139	259,584
Food Ingredients | South America
Segment Reporting Information [Line Items]
Total net sales	134,757	171,425	40,661
Fuel Ingredients
Segment Reporting Information [Line Items]
Total net sales	550,465	563,423	533,574
Fuel Ingredients | North America
Segment Reporting Information [Line Items]
Total net sales	0	0	0
Fuel Ingredients | Europe
Segment Reporting Information [Line Items]
Total net sales	550,465	563,423	533,574
Fuel Ingredients | China
Segment Reporting Information [Line Items]
Total net sales	0	0	0
Fuel Ingredients | South America
Segment Reporting Information [Line Items]
Total net sales	0	0	0
Operating Segments | Feed Ingredients
Segment Reporting Information [Line Items]
Total net sales	3,675,609	4,472,592	4,539,000
Cost of sales and operating expenses	2,886,125	3,385,859	3,473,506
Gross Margin	789,484	1,086,733	1,065,494
Gain on sale of assets	(669)	814	(3,426)
Selling, general and administrative expenses	279,095	310,363	258,781
Restructuring Costs and Asset Impairment Charges	3,671	4,026	8,557
Depreciation and amortization	350,141	360,249	295,249
Acquisition and integration costs	0	0	0
Change in fair value of contingent consideration	(46,706)	(7,891)
Equity In net income of Diamond Green Diesel	0	0	0
Segment operating income/(loss)	203,952	419,172	506,333
Equity in net income of other unconsolidated subsidiaries	11,994	5,011	5,102
Segment income/(loss)	215,946	424,183	511,435
Total assets	4,100,841	4,702,593
Capital expenditures for the year ended:	219,541	413,831	270,157
Operating Segments | Food Ingredients
Segment Reporting Information [Line Items]
Total net sales	1,489,101	1,752,065	1,459,630
Cost of sales and operating expenses	1,115,348	1,310,581	1,102,250
Gross Margin	373,753	441,484	357,380
Gain on sale of assets	(1,758)	(8,144)	(1,008)
Selling, general and administrative expenses	119,604	128,464	101,681
Restructuring Costs and Asset Impairment Charges	2,123	14,527	21,109
Depreciation and amortization	109,102	94,991	59,029
Acquisition and integration costs	0	0	0
Change in fair value of contingent consideration	0	0
Equity In net income of Diamond Green Diesel	0	0	0
Segment operating income/(loss)	144,682	211,646	176,569
Equity in net income of other unconsolidated subsidiaries	0	0	0
Segment income/(loss)	144,682	211,646	176,569
Total assets	1,997,827	2,646,702
Capital expenditures for the year ended:	81,808	92,704	72,301
Operating Segments | Fuel Ingredients
Segment Reporting Information [Line Items]
Total net sales	550,465	563,423	533,574
Cost of sales and operating expenses	435,864	446,620	426,853
Gross Margin	114,601	116,803	106,721
Gain on sale of assets	(1,730)	(91)	(60)
Selling, general and administrative expenses	32,370	23,543	13,690
Restructuring Costs and Asset Impairment Charges	0	0	0
Depreciation and amortization	35,876	34,466	29,500
Acquisition and integration costs	0	0	0
Change in fair value of contingent consideration	0	0
Equity In net income of Diamond Green Diesel	149,082	366,380	372,346
Segment operating income/(loss)	197,167	425,265	435,937
Equity in net income of other unconsolidated subsidiaries	0	0	0
Segment income/(loss)	197,167	425,265	435,937
Total assets	2,489,149	2,589,145
Capital expenditures for the year ended:	27,230	39,053	37,568
Corporate
Segment Reporting Information [Line Items]
Total net sales	0	0	0
Cost of sales and operating expenses	0	0	0
Gross Margin	0	0	0
Gain on sale of assets	0	0	0
Selling, general and administrative expenses	61,036	80,164	62,456
Restructuring Costs and Asset Impairment Charges	0	0	0
Depreciation and amortization	8,706	12,309	10,943
Acquisition and integration costs	7,842	13,884	16,372
Change in fair value of contingent consideration	0	0
Equity In net income of Diamond Green Diesel	0	0	0
Segment operating income/(loss)	(77,584)	(106,357)	(89,771)
Equity in net income of other unconsolidated subsidiaries	0	0	0
Segment income/(loss)	(77,584)	(106,357)	(89,771)
Total assets	1,482,656	1,122,644
Capital expenditures for the year ended:	$ 3,886	$ 9,892	$ 11,283