Processing Capability, Barrels of Fuel Per Day

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Investment in Unconsolidated Subsidiary (Details) barrel in Thousands, $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 30, 2020 USD ($)	Jun. 27, 2020 USD ($)	Jun. 29, 2019 USD ($)	Jun. 27, 2020 USD ($) barrel	Jun. 29, 2019 USD ($)	Dec. 28, 2019 USD ($)	Jan. 21, 2011
Schedule of Equity Method Investments [Line Items]
Investment in the joint venture		$ 729,094		$ 729,094		$ 689,354
Income (loss) from equity method investments		692	$ 82	1,561	$ (422)
Distributions of earnings from Diamond Green Diesel and other unconsolidated subsidiaries		125,000		$ 125,891	17,755
Diamond Green Diesel Holdings LLC Joint Venture [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage							50.00%
Processing cabaility \| barrel				20
Investment in the joint venture		700,300		$ 700,300
Income (loss) from equity method investments		63,500	$ 38,100	161,300	$ 62,400
Income Tax Credits and Adjustments		$ 72,200		$ 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%
Subsequent Event
Schedule of Equity Method Investments [Line Items]
Distributions of earnings from Diamond Green Diesel and other unconsolidated subsidiaries	$ 80,200