Commitments and Contingent Liabilities	6 Months Ended
Jun. 30, 2026
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	8. Commitments and Contingent Liabilities Legal Matters Between 2005 and 2012, the U.S. Environmental Protection Agency (“EPA”) and the Ohio Environmental Protection Agency (“OEPA”) issued Notices of Violations, alleging violations of air emission operating permits for our Haverhill and Granite City cokemaking facilities. We worked in a cooperative manner with the EPA, the OEPA and the Illinois Environmental Protection Agency (“IEPA”) to address the allegations and, in November 2014, entered into a consent decree with these parties in federal district court in the Southern District of Illinois. On March 25, 2025, the consent decree was terminated for the Haverhill facility. The Granite City facility has also completed substantially all consent decree requirements, with the exception of the IEPA finalizing revisions to its air permit. Accordingly, on July 30, 2025, Granite City submitted a termination report to the EPA and IEPA requesting partial termination of the consent decree based on discussions with the agencies. The Company is a party to certain pending and threatened claims, including matters related to commercial disputes, employment claims, personal injury claims, common law tort claims, and environmental claims. Although the ultimate outcome of these claims cannot be ascertained at this time, it is reasonably possible that some portion of these claims could be resolved unfavorably to the Company. Management of the Company believes that any liability which may arise from these claims would likely not have a material adverse impact on our consolidated financial statements. SunCoke's threshold for disclosing material environmental legal proceedings involving a government authority where potential monetary sanctions are involved is $1 million.

Commitments and Contingent Liabilities

6 Months Ended

Jun. 30, 2026

Commitments and Contingencies Disclosure [Abstract]

8. Commitments and Contingent Liabilities

Legal Matters

Between 2005 and 2012, the U.S. Environmental Protection Agency (“EPA”) and the Ohio Environmental Protection Agency (“OEPA”) issued Notices of Violations, alleging violations of air emission operating permits for our Haverhill and Granite City cokemaking facilities. We worked in a cooperative manner with the EPA, the OEPA and the Illinois Environmental Protection Agency (“IEPA”) to address the allegations and, in November 2014, entered into a consent decree with these parties in federal district court in the Southern District of Illinois. On March 25, 2025, the consent decree was terminated for the Haverhill facility. The Granite City facility has also completed substantially all consent decree requirements, with the exception of the IEPA finalizing revisions to its air permit. Accordingly, on July 30, 2025, Granite City submitted a termination report to the EPA and IEPA requesting partial termination of the consent decree based on discussions with the agencies.

The Company is a party to certain pending and threatened claims, including matters related to commercial disputes, employment claims, personal injury claims, common law tort claims, and environmental claims. Although the ultimate outcome of these claims cannot be ascertained at this time, it is reasonably possible that some portion of these claims could be resolved unfavorably to the Company. Management of the Company believes that any liability which may arise from these claims would likely not have a material adverse impact on our consolidated financial statements. SunCoke's threshold for disclosing material environmental legal proceedings involving a government authority where potential monetary sanctions are involved is $1 million.