Processing Capability, Barrels of Fuel Per Day

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Investment in Unconsolidated Subsidiary (Details) barrel in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2020 USD ($)	Sep. 28, 2019 USD ($)	Sep. 26, 2020 USD ($) barrel	Sep. 28, 2019 USD ($)	Dec. 28, 2019 USD ($)	Jan. 21, 2011
Schedule of Equity Method Investments [Line Items]
Investment in the joint venture	$ 742,875		$ 742,875		$ 689,354
Income (loss) from equity method investments	906	$ (665)	2,467	$ (1,087)
Distributions of earnings from Diamond Green Diesel and other unconsolidated subsidiaries			$ 207,165	57,118
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	713,200		$ 713,200
Income (loss) from equity method investments	91,100	$ 32,000	252,400	$ 94,400
Income Tax Credits and Adjustments	$ 79,900		232,100
Distributions of earnings from Diamond Green Diesel and other unconsolidated subsidiaries			$ 205,200
Diamond Green Diesel Holdings LLC Joint Venture [Member] \| Valero Energy Corporation [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage						50.00%