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Commitments and Contingencies - Coffeyville Second Consent Decree (Details) - EHS - CRRM
$ in Millions
1 Months Ended
Mar. 31, 2012
USD ($)
issue
Dec. 31, 2017
USD ($)
Loss Contingencies [Line Items]    
Marquee issues under the Clean Air Act | issue 4  
Percentage of refining capacity 95.00%  
Environmental civil penalty $ 0.7  
Estimated costs of additional incremental capital expenditures   $ 0.7