Equity Method Investments (Details) shares in Millions, $ in Millions	Apr. 21, 2017	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	May 14, 2015 shares
Schedule of Equity Method Investments [Line Items]
Equity method investments		$ 360.0	$ 360.0
Alon USA Energy, Inc. [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership, Shares | shares				33.7
Equity Method Investment, Ownership Percentage				48.00%
Equity method investments		257.0
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity		11.5
Equity Method Investment, Quoted Market Value		410.7
Joint Ventures [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investments		$ 103.0
Subsequent Event [Member]
Schedule of Equity Method Investments [Line Items]
Common Stock Conversion Rate	0.504