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Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Earnings Per Share [Abstract]        
Net income (loss) attributable to CVR Energy stockholders $ (10.5) $ 28.4 $ 11.7 $ 12.2
Weighted Average Number Diluted Shares Outstanding Adjustment 86,800,000      
Weighted-average shares of common stock outstanding - Basic and diluted (in shares)   86,800,000 86,800,000 86,800,000
Basic and diluted earnings (loss) per share (in dollars per share) $ (0.12) $ 0.33 $ 0.13 $ 0.14
Dilutive awards outstanding (in shares) 0 0 0 0