Equity Method Investments (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	May. 14, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Schedule of Equity Method Investments [Line Items]
Additional consideration		$ 8.8	$ 0.0	$ 0.0
Equity method investments		605.2	$ 0.0
Alon USA [Member]
Schedule of Equity Method Investments [Line Items]
Investment Owned, Balance, Shares	33,700,000
Equity Method Investment, Ownership Percentage	48.00%
Noncash or Part Noncash Acquisition, Noncash Financial or Equity Instrument Consideration, Shares Issued	6,000,000
Payments to Acquire Equity Method Investments	$ 200.0
Additional consideration	$ 5.0
Number of shares contingently issuable	200,000
Contingent Consideration, Stock Price Trigger	$ 50.00
Equity method investments		564.5
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity		258.9
Equity Method Investment, Quoted Market Value		500.0
Joint Ventures [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investments		40.7
Other Commitment		$ 96.0
Loans Payable [Member] | Unsecured Promissory Note, Alon [Member] | Alon USA [Member]
Schedule of Equity Method Investments [Line Items]
Debt Instrument, Face Amount	$ 145.0