Related Party Transactions	12 Months Ended
Related Party Transactions	Jan. 02, 2021
Related Party Transactions [Abstract]
Related Party Transactions Disclosure [Text Block]	RELATED PARTY TRANSACTIONS Raw Material Agreement The Company entered into a Raw Material Agreement with the DGD Joint Venture in May 2011 pursuant to which the Company will offer to supply certain animal fats and used cooking oil at market prices, but the DGD Joint Venture is not obligated to purchase the raw material offered by the Company. Additionally, the Company may offer other feedstocks to the DGD Joint Venture, such as inedible corn oil, purchased on a resale basis. For the years ended January 2, 2021, December 28, 2019 and December 29, 2018, the Company has recorded sales to the DGD Joint Venture of approximately $264.1 million, $208.7 million and $131.8 million, respectively. At January 2, 2021 and December 28, 2019, the Company has approximately $14.2 million and $17.8 million in outstanding receivables due from the DGD Joint Venture, respectively. In addition, the Company has eliminated additional sales of approximately $7.4 million, $5.1 million and $4.6 million for the years ended January 2, 2021, December 28, 2019 and December 29, 2018, respectively to the DGD Joint Venture and deferred the Company's portion of profit on those sales relating to inventory assets still remaining on the DGD Joint Venture's balance sheet at January 2, 2021, December 28, 2019 and December 29, 2018 of approximately $1.4 million, $0.8 million and $0.9 million, respectively. Revolving Loan Agreement On May 1, 2019, Darling through its wholly owned subsidiary Darling Green Energy LLC, (“Darling Green”), and a third party Diamond Alternative Energy, LLC (“Diamond Alternative” and together with Darling Green, the “DGD Lenders”) entered into a revolving loan agreement (the “DGD Loan Agreement”) with the DGD Joint Venture. The DGD Lenders have committed to make loans available to the DGD Joint Venture in the total amount of $50.0 million with each lender committed to $25.0 million of the total commitment. Any borrowings by the DGD Joint Venture under the DGD Loan Agreement are at the applicable annum rate equal to the sum of (a) the LIBO Rate (meaning Reuters BBA Libor Rates Page 3750) on such day plus (b) 2.50%. The DGD Loan Agreement matures on April 29, 2021. The DGD Loan Agreement replaces a similar agreement with lower commitment levels that expired on December 31, 2018. As of January 2, 2021, no amounts are owed to Darling Green under the DGD Loan Agreement. Guarantee Agreement In February 2020, in connection with the DGD Joint Venture’s expansion project at its Norco, LA facility, it has entered into two agreements (the “IMTT Terminaling Agreements”) with International-Matex Tank Terminals (“IMTT”), pursuant to which the DGD Joint Venture will move raw material and finished product to and from the IMTT terminal facility by pipeline, thereby providing better logistical capabilities. As a condition to entering into the IMTT Terminaling Agreements, IMTT required that the Company and Valero guarantee their proportionate share, up to $50 million each, of the DGD Joint Venture’s obligations under the IMTT Terminaling Agreements (the “Guarantee”), subject to the conditions provided for in the IMTT Terminaling Agreements. The Company has not recorded any liability as a result of the guarantee, as the Company believes the likelihood of having to make any payments under the guarantee is remote.