Summary of Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2022 employee
United States
Labor Concentrations
Number of employees	887
Percent of employees represented by United Steelworkers union	40.00%
Percent of employees represented by International Union of Operating Engineers	3.00%
Brazil
Labor Concentrations
Number of employees	285
Coke and energy plant, machinery and equipment | Minimum
Property, Plant and Equipment
Useful life	25 years
Coke and energy plant, machinery and equipment | Maximum
Property, Plant and Equipment
Useful life	30 years
Logistics plant, machinery and equipment | Minimum
Property, Plant and Equipment
Useful life	15 years
Logistics plant, machinery and equipment | Maximum
Property, Plant and Equipment
Useful life	35 years