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Equity Method Investments Financial Information (Details) - Alon USA Energy, Inc. - USD ($)
$ in Millions
6 Months Ended 12 Months Ended
Jun. 30, 2017
Dec. 31, 2016
Income Statement Information [Abstract]    
Net revenues $ 2,269.7 $ 3,913.4
Gross profit 351.2 536.6
Pre-tax income (loss) 20.0 (126.6)
Net income (loss) 15.0 (79.8)
Net income (loss) attributable to Alon $ 9.5 $ (82.8)