Segment Data Narrative (Details) bpd in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($) bbl / pure store	Dec. 31, 2017 USD ($) store	Dec. 31, 2016 USD ($)		Feb. 12, 2018 asphalt_terminal
Segment Reporting Information [Line Items]
Revenue from related parties	$ 0.0	$ 0.0	$ 292.1	[1]
Number of stores | store	279	302
Logistics
Segment Reporting Information [Line Items]
Revenue from related parties	$ 349.0	$ 57.5	26.0
Crude Transportation and Storage Fees | Logistics
Segment Reporting Information [Line Items]
Revenue from related parties	200.4	129.6	123.2
RIN Sales | Refining
Segment Reporting Information [Line Items]
Revenue from related parties	2.6	5.6	6.7
Products and Services to Retail Segment | Refining
Segment Reporting Information [Line Items]
Revenue from related parties	438.2
Asphalt | Refining
Segment Reporting Information [Line Items]
Revenue from related parties	51.8	11.8
Operating Segments | Logistics
Segment Reporting Information [Line Items]
Revenue from related parties	$ 4.8
Refining
Segment Reporting Information [Line Items]
Combined capacity of Tyler and El Dorado Refineries	155
Tyler Refinery
Segment Reporting Information [Line Items]
Combined capacity of Tyler and El Dorado Refineries	75
El Dorado Refinery
Segment Reporting Information [Line Items]
Combined capacity of Tyler and El Dorado Refineries	80
Alon USA Energy, Inc.
Segment Reporting Information [Line Items]
Number of stores | store	300
Alon USA Energy, Inc. | Big Spring Refinery
Segment Reporting Information [Line Items]
Combined capacity of Tyler and El Dorado Refineries	73
Alon USA Energy, Inc. | Krotz Spring Refinery
Segment Reporting Information [Line Items]
Combined capacity of Tyler and El Dorado Refineries	74
Four Asphalt Terminals
Segment Reporting Information [Line Items]
Number of asphalt terminals | asphalt_terminal					4
Discontinued Operations, Held-for-sale | Retail Entities
Segment Reporting Information [Line Items]
Revenue from related parties		186.8	292.1
Big Spring Refinery | Refining Marketing Services | Logistics
Segment Reporting Information [Line Items]
Revenue from related parties	$ 11.2
Tyler Refinery | Refining Marketing Services | Logistics
Segment Reporting Information [Line Items]
Revenue from related parties	$ 21.8	$ 20.4	$ 16.9

[1] Intercompany fees and sales for the refining segment include revenues from the Retail Entities of $292.1 million during the year ended December 31, 2016, the operations of which are reported in discontinued operations.