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Related Party Transactions - Icahn Enterprises (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Mar. 31, 2016
Dec. 31, 2015
Jun. 30, 2016
Related Party Transaction [Line Items]      
Amount paid to IEP $ 35.6 $ 35.6 $ 71.2
Amounts paid to public stockholders 7.8 7.8 15.6
Total amount paid $ 43.4 $ 43.4 $ 86.8
Per common share (in dollars per share) $ 0.5 $ 0.50 $ 1
Shares outstanding (in shares) 86.8 86.8  
IEP Energy LLC      
Related Party Transaction [Line Items]      
Ownership percentage held by controlling stockholder     82.00%