Business Segments (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 30, 2023	Dec. 31, 2022	Jan. 01, 2022
Segment Reporting Information [Line Items]
Net sales		$ 6,788,080	$ 6,532,204	$ 4,741,369
Cost of sales and operating expenses		5,143,060	5,002,609	3,499,385
Loss/(gain) on sale of assets		7,421	4,494	958
Selling, general and administrative expenses		542,534	436,608	391,538
Restructuring Costs and Asset Impairment Charges		18,553	29,666	778
Depreciation and amortization		502,015	394,721	316,387
Acquisition and integration costs		13,884	16,372	1,396
Change in fair value of contingent consideration		(7,891)	0	0
Equity In net income of Diamond Green Diesel		366,380	372,346	351,627
Segment operating income/(loss)		949,726	1,029,068	884,470
Equity in net income of other unconsolidated subsidiaries		5,011	5,102	5,753
Total other expense		(234,780)	(140,452)	(68,827)
Income before income taxes		719,957	893,718	821,396
Total assets		11,061,084	9,202,370
Capital expenditures for the year ended:	[1]	555,480	391,309	274,126
Capital assets		155,500	588,800
North America
Segment Reporting Information [Line Items]
Net sales		4,165,712	4,222,058	2,867,934
Europe
Segment Reporting Information [Line Items]
Net sales		1,691,449	1,769,973	1,521,031
China
Segment Reporting Information [Line Items]
Net sales		308,572	284,684	253,212
South America
Segment Reporting Information [Line Items]
Net sales		534,082	187,343	31,446
Feed Ingredients [Member]
Segment Reporting Information [Line Items]
Net sales		4,472,592	4,539,000	3,039,500
Cost of sales and operating expenses		3,385,859	3,473,506	2,206,248
Gross Margin		1,086,733	1,065,494	833,252
Loss/(gain) on sale of assets		814	(3,426)	(550)
Selling, general and administrative expenses		310,363	258,781	220,078
Restructuring Costs and Asset Impairment Charges		4,026	8,557	0
Depreciation and amortization		360,249	295,249	218,942
Acquisition and integration costs		0	0	0
Change in fair value of contingent consideration		(7,891)
Equity In net income of Diamond Green Diesel		0	0	0
Segment operating income/(loss)		419,172	506,333	394,782
Equity in net income of other unconsolidated subsidiaries		5,011	5,102	5,753
Segment income/(loss)		424,183	511,435	400,535
Total assets		4,702,593	4,866,351
Capital expenditures for the year ended:		413,831	270,157	187,445
Feed Ingredients [Member] | North America
Segment Reporting Information [Line Items]
Net sales		3,696,423	3,852,559	2,577,705
Feed Ingredients [Member] | Europe
Segment Reporting Information [Line Items]
Net sales		373,180	502,432	430,549
Feed Ingredients [Member] | China
Segment Reporting Information [Line Items]
Net sales		27,433	25,100	19,446
Feed Ingredients [Member] | South America
Segment Reporting Information [Line Items]
Net sales		362,657	146,682	0
Food Ingredients [Member]
Segment Reporting Information [Line Items]
Net sales		1,752,065	1,459,630	1,271,629
Cost of sales and operating expenses		1,310,581	1,102,250	979,232
Gross Margin		441,484	357,380	292,397
Loss/(gain) on sale of assets		(8,144)	(1,008)	(88)
Selling, general and administrative expenses		128,464	101,681	97,555
Restructuring Costs and Asset Impairment Charges		14,527	21,109	0
Depreciation and amortization		94,991	59,029	60,929
Acquisition and integration costs		0	0	0
Change in fair value of contingent consideration		0
Equity In net income of Diamond Green Diesel		0	0	0
Segment operating income/(loss)		211,646	176,569	134,001
Equity in net income of other unconsolidated subsidiaries		0	0	0
Segment income/(loss)		211,646	176,569	134,001
Total assets		2,646,702	1,251,473
Capital expenditures for the year ended:		92,704	72,301	54,799
Food Ingredients [Member] | North America
Segment Reporting Information [Line Items]
Net sales		469,289	369,499	286,852
Food Ingredients [Member] | Europe
Segment Reporting Information [Line Items]
Net sales		754,846	733,967	663,619
Food Ingredients [Member] | China
Segment Reporting Information [Line Items]
Net sales		281,139	259,584	233,766
Food Ingredients [Member] | South America
Segment Reporting Information [Line Items]
Net sales		171,425	40,661	31,446
Fuel Ingredients [Member]
Segment Reporting Information [Line Items]
Net sales		563,423	533,574	430,240
Cost of sales and operating expenses		446,620	426,853	313,905
Gross Margin		116,803	106,721	116,335
Loss/(gain) on sale of assets		(91)	(60)	(320)
Selling, general and administrative expenses		23,543	13,690	16,999
Restructuring Costs and Asset Impairment Charges		0	0	778
Depreciation and amortization		34,466	29,500	25,436
Acquisition and integration costs		0	0	0
Change in fair value of contingent consideration		0
Equity In net income of Diamond Green Diesel		366,380	372,346	351,627
Segment operating income/(loss)		425,265	435,937	425,069
Equity in net income of other unconsolidated subsidiaries		0	0	0
Segment income/(loss)		425,265	435,937	425,069
Total assets		2,589,145	2,307,199
Capital expenditures for the year ended:		39,053	37,568	26,078
Fuel Ingredients [Member] | North America
Segment Reporting Information [Line Items]
Net sales		0	0	3,377
Fuel Ingredients [Member] | Europe
Segment Reporting Information [Line Items]
Net sales		563,423	533,574	426,863
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		80,164	62,456	56,906
Restructuring Costs and Asset Impairment Charges		0	0	0
Depreciation and amortization		12,309	10,943	11,080
Acquisition and integration costs		13,884	16,372	1,396
Change in fair value of contingent consideration		0
Equity In net income of Diamond Green Diesel		0	0	0
Segment operating income/(loss)		(106,357)	(89,771)	(69,382)
Equity in net income of other unconsolidated subsidiaries		0	0	0
Segment income/(loss)		(106,357)	(89,771)	(69,382)
Total assets		1,122,644	777,347
Capital expenditures for the year ended:		9,892	11,283	5,804
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales		6,788,080	6,532,204	4,741,369
Cost of sales and operating expenses		5,143,060	5,002,609	3,499,385
Gross Margin		1,645,020	1,529,595	1,241,984
Loss/(gain) on sale of assets		(7,421)	(4,494)	(958)
Selling, general and administrative expenses		542,534	436,608	391,538
Restructuring Costs and Asset Impairment Charges		18,553	29,666	778
Depreciation and amortization		502,015	394,721	316,387
Acquisition and integration costs		13,884	16,372	1,396
Change in fair value of contingent consideration		(7,891)
Equity In net income of Diamond Green Diesel		366,380	372,346	351,627
Segment operating income/(loss)		949,726	1,029,068	884,470
Equity in net income of other unconsolidated subsidiaries		5,011	5,102	5,753
Segment income/(loss)		954,737	1,034,170	$ 890,223
Total assets		$ 11,061,084	$ 9,202,370

[1] Excludes capital assets acquired by acquisition in fiscal 2023 and fiscal 2022 of approximately $155.5 million and $588.8 million, respectively.