Property, Plant and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 2,999.6	$ 2,772.5
Less: accumulated depreciation	(804.7)	(631.7)
Property, plant and equipment, net	2,194.9	2,140.8
Depreciation expense	189.0	149.5
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment	66.2	54.0
Building and building improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment	108.7	67.9
Refinery machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	1,801.8	1,823.4
Pipelines and terminals
Property, Plant and Equipment [Line Items]
Property, plant and equipment	412.2	314.3
Retail store equipment and site improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment	37.8	75.5
Refinery turnaround costs
Property, Plant and Equipment [Line Items]
Property, plant and equipment	166.9	124.8
Other equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	124.9	108.2
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment	281.1	204.4
Operating Segments | Refining
Property, Plant and Equipment [Line Items]
Property, plant and equipment	2,230.6	2,112.2
Less: accumulated depreciation	(584.2)	(474.8)
Property, plant and equipment, net	1,646.4	1,637.4
Depreciation expense	124.2	106.8
Operating Segments | Logistics
Property, Plant and Equipment [Line Items]
Property, plant and equipment	452.7	367.2
Less: accumulated depreciation	(140.2)	(112.1)
Property, plant and equipment, net	312.5	255.1
Depreciation expense	25.9	20.9
Operating Segments | Retail
Property, Plant and Equipment [Line Items]
Property, plant and equipment	146.5	141.9
Less: accumulated depreciation	(29.3)	(6.7)
Property, plant and equipment, net	117.2	135.2
Depreciation expense	23.8	6.6
Corporate, Other and Eliminations
Property, Plant and Equipment [Line Items]
Property, plant and equipment	169.8	151.2
Less: accumulated depreciation	(51.0)	(38.1)
Property, plant and equipment, net	118.8	113.1
Depreciation expense	$ 15.1	$ 15.2