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Revenue from Contracts with Customers - Narrative (Details) T in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2020 USD ($) T
Cokemaking |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Capacity (in tons) | 4.1
Percentage of facility capacity | 90.00%
Unsatisfied performance obligation (in tons) | 17.6
Average remaining term | 6 years
Logistics |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Average remaining term | 3 years
Performance obligation amount | $ | $ 35.0

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