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Share-Based Compensation - Long-Term Incentive Plan, CVR Energy (Details)
3 Months Ended 12 Months Ended
Nov. 01, 2017
USD ($)
trading_day
$ / shares
shares
Mar. 31, 2018
USD ($)
shares
Dec. 31, 2017
USD ($)
Share-Based Compensation      
Personnel accruals   $ 27,700,000 $ 55,900,000
CVR Energy Long Term Incentive Plan      
Share-Based Compensation      
Common stock authorized for issuance (in shares) | shares   7,500,000  
CVR Energy Long Term Incentive Plan | Stock Options      
Share-Based Compensation      
Common stock authorized for issuance (in shares) | shares   1,000,000  
Chief Executive Officer | 2016 Performance Unit Award Agreement | Performance Unit Awards      
Share-Based Compensation      
Compensation expense (benefit)     1,800,000
Personnel accruals     1,800,000
Share-based compensation costs paid   $ 1,800,000  
Chief Executive Officer | 2017 Performance Unit Agreement | Performance Unit Awards      
Share-Based Compensation      
Awards granted (in shares) | shares 1,500    
Cash amount granted per unit of performance factor achieved $ 1,000    
Compensation expense (benefit)   400,000  
Personnel accruals   400,000  
Chief Executive Officer | 2017 Performance Unit Award Agreement | Performance Unit Awards      
Share-Based Compensation      
Compensation expense (benefit)   600,000  
Personnel accruals   $ 600,000  
Maximum cash payment $ 10,000,000.0    
Period for determination of cash payment value | trading_day 30    
Maximum price per share to trigger maximum cash payment (in dollars per share) | $ / shares $ 60    
Unrecognized compensation expense     $ 9,400,000
Weighted-average period for amortization of unrecognized compensation cost     3 years 9 months 18 days