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Subsequent Events (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Jul. 29, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Dividend              
Dividends declared per share (in dollars per share)   $ 0.50 $ 0.50 $ 0.50 $ 0.75 $ 1.00 $ 1.50
Dividends declared           $ 86.8  
IEP Energy LLC              
Dividend              
Ownership percentage held by controlling stockholder           82.00%  
Subsequent event              
Dividend              
Dividends declared per share (in dollars per share) $ 0.50            
Dividends declared $ 43.4            
Subsequent event | CVR Partners, LP              
Distribution              
Declared distribution to limited partner (in dollars per share) $ 0.39            
Declared distribution to limited partner $ 28.5            
Expected proceeds from distribution $ 15.2            
Subsequent event | CVR Refining, LP              
Distribution              
Declared distribution to limited partner (in dollars per share) $ 0.98            
Declared distribution to limited partner $ 144.6            
Expected proceeds from distribution 95.4            
Subsequent event | IEP Energy LLC              
Dividend              
Dividends declared $ 35.6            
Ownership percentage held by controlling stockholder 82.00%