Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Sep. 30, 2025
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies We are a party to various litigation and legal proceedings in the ordinary course of business which we believe, based on advice of counsel, will not either individually or in the aggregate have a material adverse effect on our financial condition, results of operations or cash flows. Renewable Fuel Standard During 2017 and 2019, the Environmental Protection Agency (“EPA”) granted the Cheyenne, Wyoming refinery (the “Cheyenne Refinery”) and the refinery in Woods Cross, Utah (the “Woods Cross Refinery”) each a one-year small refinery exemption from the Renewable Fuel Standard (“RFS”) program requirements for the 2016 and 2018 compliance years. As a result, the Cheyenne Refinery’s and Woods Cross Refinery’s gasoline and diesel production were not subject to the renewable volume obligation for the respective years. Upon each exemption granted, we increased our inventory of RINs and reduced our Cost of sales. On April 7, 2022, the EPA issued a decision reversing the grant of small refinery exemptions for our Woods Cross Refinery and Cheyenne Refinery for the 2018 compliance year. On June 3, 2022, the EPA issued a decision reversing the grant of small refinery exemptions for our Woods Cross Refinery and Cheyenne Refinery for the 2016 compliance year and denying small refinery exemption petitions for our Woods Cross Refinery and Cheyenne Refinery for the 2019 and 2020 compliance years. Certain of our subsidiaries pursued legal challenges to the EPA’s decisions to deny small refinery exemptions for the 2016, 2018, 2019 and 2020 compliance years. The first lawsuit, filed against the EPA on May 6, 2022, before the U.S. Court of Appeals for the DC Circuit (the “DC Circuit”), sought to have the EPA’s reversal of our 2018 small refinery exemption petitions overturned. The second lawsuit, filed against the EPA on August 5, 2022 before the DC Circuit, sought to have the EPA’s reversal of our 2016 small refinery exemption petitions overturned and to have the EPA’s denial of our 2019 and 2020 small refinery exemption petitions reversed. In addition, for both the 2016 and 2018 compliance years, pursuant to the June 2022 and April 2022 decisions, the EPA established an alternative compliance demonstration for small refineries pursuant to which the EPA is not imposing any obligations for the small refineries whose exemptions were reversed. On June 24, 2022, Growth Energy filed two lawsuits in the DC Circuit against the EPA challenging the alternative compliance demonstration for the 2016 and 2018 compliance years. On July 25, 2022, certain of our subsidiaries intervened on behalf of the EPA to aid the defense of the EPA’s alternative compliance demonstration decision. On July 26, 2024, the DC Circuit issued a favorable decision vacating the EPA’s denial of all of our small refinery exemption petitions, finding the denial to be unlawful. The DC Circuit remanded the small refinery exemption petitions to the EPA for new determination. The DC Circuit also upheld the alternative compliance demonstration and denied Growth Energy’s challenge. On August 22, 2025, the EPA granted, in whole or in part, small refinery exemption requests for our Woods Cross Refinery, our Cheyenne Refinery, our refinery in Casper, Wyoming (the “Casper Refinery”), and our refinery in Sinclair, Wyoming (the “Parco Refinery”) for various compliance years from 2019 to 2024. The EPA also denied, in whole or in part, small refinery exemption requests for the Cheyenne Refinery, the Woods Cross Refinery, the Casper Refinery, and the Parco Refinery for various compliance years from 2019 to 2024. In October 2025, certain of our subsidiaries filed lawsuits in the DC Circuit to overturn the EPA’s August 2025 denials and other actions. These lawsuits remain pending, and we are unable to estimate the costs we may incur, if any, at this time. Navajo HF Sinclair Navajo Refining LLC (“HFS Navajo”) was engaged in discussions with, and responded to document requests from the EPA, the United States Department of Justice (the “DOJ”), and the New Mexico Environment Department (“NMED”) regarding HFS Navajo’s compliance with the Clean Air Act (“CAA”) and underlying regulations, and similar New Mexico laws and regulations, at its Artesia and Lovington, New Mexico refineries. On January 17, 2025, HFS Navajo reached a settlement agreement with the EPA, DOJ, and NMED, and a new consent decree was entered with the U.S. District Court for the District of New Mexico on May 5, 2025 (the “2025 Consent Decree”) resolving alleged CAA and New Mexico Air Quality Control Act violations as well as alleged violations of a 2002 consent decree at the Artesia refinery. Under the 2025 Consent Decree, HFS Navajo was required to pay the sum of $34 million as a civil penalty to the United States and the State of New Mexico according to the following schedule: (1) $10 million to the United States, and $10 million to the State of New Mexico within 30 days after the effective date of the 2025 Consent Decree; which were paid in May 2025, and (2) $7 million to the United States and $7 million to the State of New Mexico, with interest, by January 31, 2026; which were paid in October 2025. Separately, on January 29, 2025, HFS Navajo paid stipulated penalties in the amount of $1 million, divided equally between the United States and the State of New Mexico, resolving alleged noncompliance under the 2002 Consent Decree. Finally, HFS Navajo must implement injunctive relief and mitigation measures at an estimated cost of $137 million, including capital investments, at the Artesia refinery, certain of which measures have already been implemented as of the date of filing this Quarterly Report on Form 10-Q and the remainder of which must be completed by various deadlines, ending in 2031.