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Share-Based Compensation (Details 4) - CVR Partners, LP - CVR Partners' Long-Term Incentive Plan - Phantom Unit and Common Unit - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Non-vested shares activity        
Non-vested at the beginning of the period (in shares) 243,946 171,119 201,812  
Granted (in shares) 245,199 198,141 58,536  
Vested (in shares) (94,854) (48,310) (89,229)  
Forfeited (in shares) (2,388) (77,004) 0  
Non-vested at the end of the period (in shares) 391,903 243,946 171,119  
Weighted-Average Grant-Date Fair Value        
Non-vested at the beginning of the period (in dollars per share) $ 11.07 $ 21.34 $ 23.70  
Granted (in dollars per share) 7.87 9.44 16.13  
Vested (in dollars per share) 12.55 20.95 23.24  
Forfeited (in dollars per share) 10.99 23.49 0.00  
Non-vested at the end of the period (in dollars per share) $ 8.71 $ 11.07 $ 21.34  
Aggregate Intrinsic Value $ 3.1 $ 2.4 $ 2.8 $ 5.1