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General (Details)
T in Millions
 9 Months Ended
Sep. 30, 2023
facility
T
New Accounting Pronouncements or Change in Accounting Principle [Line Items]  
Coke production experience, more than 60 years
United States  
New Accounting Pronouncements or Change in Accounting Principle [Line Items]  
Number of facilities | facility 5
Coke making capacity (in tons) 4.2
Brazil  
New Accounting Pronouncements or Change in Accounting Principle [Line Items]  
Number of facilities | facility 1
Coke making capacity (in tons) 1.7
Convent, Louisiana, East Chicago, Indiana, West Virginia  
New Accounting Pronouncements or Change in Accounting Principle [Line Items]  
Coal handling capacity (in tons) 40.0
Coal storage capacity (in tons) 3.0