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Earnings Per Share (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 0 Months Ended 1 Months Ended 3 Months Ended 9 Months Ended
Aug. 19, 2013
Jun. 10, 2013
May 17, 2013
Feb. 19, 2013
May 31, 2013
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Earnings Per Share [Abstract]                  
Net income attributable to CVR Energy stockholders           $ 44.0 $ 208.9 $ 392.4 $ 338.4
Weighted-average number of shares of common stock outstanding 86,800,000 86,800,000 86,800,000 86,800,000   86,800,000 86,800,000 86,800,000 86,800,000
Effect of dilutive securities:                  
Non-vested common stock (in shares)           0 0 0 800,000
Stock options (in shares)           0 0 0 0
Weighted-average number of shares of common stock outstanding assuming dilution           86,800,000 86,800,000 86,800,000 87,600,000
Basic earnings per share (in dollars per share)           $ 0.51 $ 2.41 $ 4.52 $ 3.90
Diluted earnings per share (in dollars per share)           $ 0.51 $ 2.41 $ 4.52 $ 3.86
Number of option exercised         22,900        
Long-Term Incentive Plan
                  
Antidilutive securities                  
Dilutive Awards Outstanding           0 0 0