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Share-Based Compensation - Summary of Restricted Stock Units Activity (Details) - CVR Energy Long Term Incentive Plan - Restricted stock units - USD ($)
$ / shares in Units, $ in Millions
 1 Months Ended 12 Months Ended
Dec. 31, 2014
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Non-vested shares activity        
Non-vested at the beginning of the period (in shares)   0 599 48,011
Granted (in shares)     0 0
Vested (in shares)     (599) (43,085)
Forfeited (in shares)     0 (4,327)
Non-vested at the end of the period (in shares) 48,011 0 0 599
Weighted-Average Grant-Date Fair Value        
Non-vested at the beginning of the period (in dollars per share)   $ 0.00 $ 57.23 $ 45.89
Granted (in dollars per share)     0.00 0.00
Vested (in dollars per share)     57.23 45.55
Forfeited (in dollars per share)     0.00 47.68
Non-vested at the end of the period (in dollars per share) $ 45.89   $ 0.00 $ 57.23
Aggregate Intrinsic Value $ 1.9   $ 0.0 $ 0.0