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Earnings Per Share (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 1 Months Ended 3 Months Ended 9 Months Ended
May 31, 2012
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Earnings Per Share          
Net income attributable to CVR Energy stockholders   $ 208,896 $ 109,265 $ 338,428 $ 279,918
Weighted-average number of shares of common stock outstanding   86,831,050 86,549,846 86,820,181 86,462,668
Effect of dilutive securities:          
Non-vested common stock (in shares)     1,188,297 757,480 1,305,096
Stock options (in shares)     5,457 2,927 4,405
Weighted-average number of shares of common stock outstanding assuming dilution   86,831,050 87,743,600 87,580,588 87,772,169
Basic earnings per share (in dollars per share)   $ 2.41 $ 1.26 $ 3.90 $ 3.24
Diluted earnings per share (in dollars per share)   $ 2.41 $ 1.25 $ 3.86 $ 3.19
Number of option exercised 22,900