Business Segments (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Jan. 01, 2022	Jan. 02, 2021
Segment Reporting Information [Line Items]
Net sales		$ 6,532,204	$ 4,741,369	$ 3,571,923
Cost of sales and operating expenses		5,002,609	3,499,385	2,688,815
Loss/(gain) on sale of assets		4,494	958	(426)
Selling, general and administrative expenses		436,608	391,538	378,496
Restructuring Costs and Asset Impairment Charges		29,666	778	38,167
Depreciation and amortization		394,721	316,387	350,178
Acquisition and integration costs		16,372	1,396	0
Equity In net income of Diamond Green Diesel		372,346	351,627	315,095
Segment operating income/(loss)		1,029,068	884,470	430,936
Equity in net income of other unconsolidated subsidiaries		5,102	5,753	3,193
Total other expense		(140,452)	(68,827)	(80,510)
Income before income taxes		893,718	821,396	353,619
Total assets		9,202,370	6,133,728
Capital expenditures for the year ended:	[1]	391,309	274,126	280,115
Capital assets		588,800		18,400
Long-Lived Assets		7,564,273	5,044,714
North America
Segment Reporting Information [Line Items]
Net sales		4,222,058	2,867,934	1,960,503
Long-Lived Assets		5,229,906	3,564,765
Europe
Segment Reporting Information [Line Items]
Net sales		1,769,973	1,521,031	1,296,668
Long-Lived Assets		1,276,333	1,259,018
China
Segment Reporting Information [Line Items]
Net sales		284,684	253,212	202,093
Long-Lived Assets		120,801	129,767
South America
Segment Reporting Information [Line Items]
Net sales		187,343	31,446	38,238
Long-Lived Assets		920,827	77,758
Other
Segment Reporting Information [Line Items]
Long-Lived Assets		16,406	13,406
Feed Ingredients [Member]
Segment Reporting Information [Line Items]
Net sales		4,539,000	3,039,500	2,072,104
Cost of sales and operating expenses		3,473,506	2,206,248	1,544,524
Gross Margin		1,065,494	833,252	527,580
Loss/(gain) on sale of assets		(3,426)	(550)	19
Selling, general and administrative expenses		258,781	220,078	209,748
Restructuring Costs and Asset Impairment Charges		8,557	0	0
Depreciation and amortization		295,249	218,942	221,187
Acquisition and integration costs		0	0
Equity In net income of Diamond Green Diesel		0	0	0
Segment operating income/(loss)		506,333	394,782	96,626
Equity in net income of other unconsolidated subsidiaries		5,102	5,753	3,193
Segment income/(loss)		511,435	400,535	99,819
Total assets		4,866,351	2,714,528
Capital expenditures for the year ended:		270,157	187,445	176,530
Feed Ingredients [Member] | North America
Segment Reporting Information [Line Items]
Net sales		3,852,559	2,577,705	1,694,705
Feed Ingredients [Member] | Europe
Segment Reporting Information [Line Items]
Net sales		502,432	430,549	352,748
Feed Ingredients [Member] | China
Segment Reporting Information [Line Items]
Net sales		25,100	19,446	13,676
Feed Ingredients [Member] | South America
Segment Reporting Information [Line Items]
Net sales		146,682	0	0
Food Ingredients [Member]
Segment Reporting Information [Line Items]
Net sales		1,459,630	1,271,629	1,185,701
Cost of sales and operating expenses		1,102,250	979,232	920,682
Gross Margin		357,380	292,397	265,019
Loss/(gain) on sale of assets		(1,008)	(88)	482
Selling, general and administrative expenses		101,681	97,555	97,406
Restructuring Costs and Asset Impairment Charges		21,109	0	0
Depreciation and amortization		59,029	60,929	83,752
Acquisition and integration costs		0	0
Equity In net income of Diamond Green Diesel		0	0	0
Segment operating income/(loss)		176,569	134,001	83,379
Equity in net income of other unconsolidated subsidiaries		0	0	0
Segment income/(loss)		176,569	134,001	83,379
Total assets		1,251,473	1,205,217
Capital expenditures for the year ended:		72,301	54,799	68,250
Food Ingredients [Member] | North America
Segment Reporting Information [Line Items]
Net sales		369,499	286,852	244,929
Food Ingredients [Member] | Europe
Segment Reporting Information [Line Items]
Net sales		733,967	663,619	650,671
Food Ingredients [Member] | China
Segment Reporting Information [Line Items]
Net sales		259,584	233,766	188,417
Food Ingredients [Member] | South America
Segment Reporting Information [Line Items]
Net sales		40,661	31,446	38,238
Fuel Ingredients [Member]
Segment Reporting Information [Line Items]
Net sales		533,574	430,240	314,118
Cost of sales and operating expenses		426,853	313,905	223,609
Gross Margin		106,721	116,335	90,509
Loss/(gain) on sale of assets		(60)	(320)	(75)
Selling, general and administrative expenses		13,690	16,999	16,014
Restructuring Costs and Asset Impairment Charges		0	778	38,167
Depreciation and amortization		29,500	25,436	34,218
Acquisition and integration costs		0	0
Equity In net income of Diamond Green Diesel		372,346	351,627	315,095
Segment operating income/(loss)		435,937	425,069	317,280
Equity in net income of other unconsolidated subsidiaries		0	0	0
Segment income/(loss)		435,937	425,069	317,280
Total assets		2,307,199	1,658,892
Capital expenditures for the year ended:		37,568	26,078	30,638
Fuel Ingredients [Member] | North America
Segment Reporting Information [Line Items]
Net sales		0	3,377	20,869
Fuel Ingredients [Member] | Europe
Segment Reporting Information [Line Items]
Net sales		533,574	426,863	293,249
Fuel Ingredients [Member] | China
Segment Reporting Information [Line Items]
Net sales		0	0	0
Fuel Ingredients [Member] | South America
Segment Reporting Information [Line Items]
Net sales		0	0	0
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Net sales		0	0	0
Cost of sales and operating expenses		0	0	0
Gross Margin		0	0	0
Loss/(gain) on sale of assets		0	0	0
Selling, general and administrative expenses		62,456	56,906	55,328
Restructuring Costs and Asset Impairment Charges		0	0	0
Depreciation and amortization		10,943	11,080	11,021
Acquisition and integration costs		16,372	1,396
Equity In net income of Diamond Green Diesel		0	0	0
Segment operating income/(loss)		(89,771)	(69,382)	(66,349)
Equity in net income of other unconsolidated subsidiaries		0	0	0
Segment income/(loss)		(89,771)	(69,382)	(66,349)
Total assets		777,347	555,091
Capital expenditures for the year ended:		11,283	5,804	4,697
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales		6,532,204	4,741,369	3,571,923
Cost of sales and operating expenses		5,002,609	3,499,385	2,688,815
Gross Margin		1,529,595	1,241,984	883,108
Loss/(gain) on sale of assets		(4,494)	(958)	426
Selling, general and administrative expenses		436,608	391,538	378,496
Restructuring Costs and Asset Impairment Charges		29,666	778	38,167
Depreciation and amortization		394,721	316,387	350,178
Acquisition and integration costs		16,372	1,396
Equity In net income of Diamond Green Diesel		372,346	351,627	315,095
Segment operating income/(loss)		1,029,068	884,470	430,936
Equity in net income of other unconsolidated subsidiaries		5,102	5,753	3,193
Segment income/(loss)		1,034,170	890,223	$ 434,129
Total assets		$ 9,202,370	$ 6,133,728

[1] Excludes capital assets acquired by acquisition in fiscal 2022 and fiscal 2020 of approximately $588.8 million and $18.4 million, respectively.