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Revenue from Contracts with Customers (Narrative) (Details)
T in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2022
USD ($)
agreement
T
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Number of coke sales agreements with fixed operating costs 3
Number of coke sales agreements with operating costs passed through to customers 4
Cokemaking  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Unsatisfied performance obligation (in tons) | T 10.9
Average remaining term 5 years
Logistics  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Average remaining term 4 years
Performance obligation amount | $ $ 51.4