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Investment in Unconsolidated Subsidiary (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2021	Jun. 27, 2020	Jul. 03, 2021	Jun. 27, 2020	Jan. 02, 2021	Jan. 21, 2011
Schedule of Equity Method Investments [Line Items]
Investment in the joint venture	$ 1,037,436		$ 1,037,436		$ 804,682
Income (loss) from equity method investments	1,940	$ 692	2,552	$ 1,561
Distributions of earnings from Diamond Green Diesel and other unconsolidated subsidiaries			2,497	125,891
Diamond Green Diesel Holdings LLC Joint Venture [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage						50.00%
Investment in the joint venture	1,002,400		1,002,400
Income (loss) from equity method investments	125,800	63,500	228,000	161,300
Income Tax Credits and Adjustments	$ 83,900	$ 72,200	$ 162,900	$ 152,200
Diamond Green Diesel Holdings LLC Joint Venture [Member] \| Valero Energy Corporation [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage						50.00%