v3.25.2
Business Segment Information - Schedule of Adjusted EBITDA Reportable Segments (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Segment Reporting Information [Line Items]        
Sales and other operating revenue $ 434.1 $ 470.9 $ 870.1 $ 959.3
Less:        
Selling, general and administrative expenses 20.6 17.8 35.3 36.2
Depreciation and amortization expense 28.6 28.7 57.4 62.0
Interest expense, net 5.4 5.8 10.6 12.1
Income before income tax expense 4.4 28.9 29.4 57.1
Interest expense 7.0 7.2 13.8 14.4
Interest income 1.6 1.4 3.2 2.3
Elimination        
Segment Reporting Information [Line Items]        
Sales and other operating revenue (5.9) (5.9) (11.5) (11.8)
Operating Segments        
Segment Reporting Information [Line Items]        
Sales and other operating revenue 440.0 476.8 881.6 971.1
Less:        
Adjusted EBITDA reportable segments 50.8 72.6 116.7 149.4
Depreciation and amortization expense 28.1 28.5 56.4 61.7
Corporate and Other        
Less:        
Other corporate expenses 12.4 9.2 19.3 18.2
Domestic Coke        
Segment Reporting Information [Line Items]        
Sales and other operating revenue 410.4 441.6 816.2 901.1
Domestic Coke | Elimination        
Segment Reporting Information [Line Items]        
Sales and other operating revenue 0.0 0.0 0.0 0.0
Domestic Coke | Operating Segments        
Segment Reporting Information [Line Items]        
Sales and other operating revenue 410.4 441.6 816.2 901.1
Less:        
Operating and maintenance expense 71.2 78.8 142.3 150.3
Cost of products sold and other expenses 291.5 297.4 569.5 616.1
Selling, general and administrative expenses 7.2 7.5 14.0 15.4
Adjusted EBITDA reportable segments 40.5 57.9 90.4 119.3
Depreciation and amortization expense 24.9 25.4 50.0 55.3
Brazil Coke        
Segment Reporting Information [Line Items]        
Sales and other operating revenue 8.6 9.1 16.4 17.4
Brazil Coke | Elimination        
Segment Reporting Information [Line Items]        
Sales and other operating revenue 0.0 0.0 0.0 0.0
Brazil Coke | Operating Segments        
Segment Reporting Information [Line Items]        
Sales and other operating revenue 8.6 9.1 16.4 17.4
Less:        
Operating and maintenance expense 5.3 5.6 10.1 10.7
Cost of products sold and other expenses 0.0 0.0 0.0 0.0
Selling, general and administrative expenses 0.7 1.0 1.4 1.8
Adjusted EBITDA reportable segments 2.6 2.5 4.9 4.9
Depreciation and amortization expense 0.0 0.0 0.1 0.1
Logistics        
Segment Reporting Information [Line Items]        
Sales and other operating revenue 15.1 20.2 37.5 40.8
Logistics | Elimination        
Segment Reporting Information [Line Items]        
Sales and other operating revenue (5.9) (5.9) (11.5) (11.8)
Logistics | Operating Segments        
Segment Reporting Information [Line Items]        
Sales and other operating revenue 21.0 26.1 49.0 52.6
Less:        
Operating and maintenance expense 13.0 13.5 27.0 26.6
Cost of products sold and other expenses 0.0 0.0 0.0 0.0
Selling, general and administrative expenses 0.3 0.4 0.6 0.8
Adjusted EBITDA reportable segments 7.7 12.2 21.4 25.2
Depreciation and amortization expense $ 3.2 $ 3.1 $ 6.3 $ 6.3