Property, Plant and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 2,772.5	$ 1,587.6
Less: accumulated depreciation	(631.7)	(484.3)
Property, plant and equipment, net	2,140.8	1,103.3
Depreciation expense	149.5	115.1
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment	54.0	12.4
Building and building improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment	67.9	32.1
Refinery machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	1,823.4	982.5
Pipelines and terminals
Property, Plant and Equipment [Line Items]
Property, plant and equipment	314.3	302.5
Retail store equipment and site improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment	75.5	10.7
Refinery turnaround costs
Property, Plant and Equipment [Line Items]
Property, plant and equipment	124.8	124.2
Other equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	108.2	89.1
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment	204.4	34.1
Operating Segments | Refining
Property, Plant and Equipment [Line Items]
Property, plant and equipment	2,112.2	1,202.9
Less: accumulated depreciation	(474.8)	(370.0)
Property, plant and equipment, net	1,637.4	832.9
Depreciation expense	106.8	88.0
Operating Segments | Logistics
Property, Plant and Equipment [Line Items]
Property, plant and equipment	367.2	342.4
Less: accumulated depreciation	(112.1)	(91.4)
Property, plant and equipment, net	255.1	251.0
Depreciation expense	20.9	19.7
Operating Segments | Retail
Property, Plant and Equipment [Line Items]
Property, plant and equipment	141.9	0.0
Less: accumulated depreciation	(6.7)	0.0
Property, plant and equipment, net	135.2	0.0
Depreciation expense	6.6	0.0
Corporate, Other and Eliminations
Property, Plant and Equipment [Line Items]
Property, plant and equipment	151.2	42.3
Less: accumulated depreciation	(38.1)	(22.9)
Property, plant and equipment, net	113.1	19.4
Depreciation expense	$ 15.2	$ 7.4