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Commitments and Contingencies (Details 3)
$ in Millions
3 Months Ended 6 Months Ended
Aug. 31, 2012
Jun. 30, 2015
USD ($)
sponsor
Jun. 30, 2014
USD ($)
Jun. 30, 2015
USD ($)
sponsor
Jun. 30, 2014
USD ($)
Dec. 31, 2014
USD ($)
Loss Contingencies [Line Items]            
Environmental costs recognized capitalized in the period   $ 7.4 $ 26.4 $ 18.3 $ 60.2  
Affiliate pension obligations            
Minimum ownership interest in CVR Energy by Mr. Icahn's affiliates (as a percent)   80.00%   80.00%    
Number of sponsors of pension plans | sponsor   2   2    
Mr. Icahn's affiliates            
Affiliate pension obligations            
Ownership percentage held by controlling stockholder       82.00%    
EHS            
Loss Contingencies [Line Items]            
Environmental accruals   $ 3.0   $ 3.0   $ 1.1
EHS | CRRM            
Loss Contingencies [Line Items]            
Cost of renewable identification numbers   37.5 $ 29.1 74.1 $ 63.8  
Biofuel blending obligation recorded in other current liabilities   33.2   33.2   52.3
Affiliate Pension Obligations            
Affiliate pension obligations            
Underfunded pension obligation, if ACF and Federal-Mogul plans were voluntarily terminated   $ 500.4   $ 500.4   $ 473.8
New Vitol Agreement | CRRM            
Loss Contingencies [Line Items]            
Renewal term of agreement 1 year          
Number of days for prior notice of nonrenewal 180 days