Other Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	$ 134.8	$ 125.4
Accumulated Amortization	(30.4)	(24.3)
Intangible assets, net	104.4	101.1
Estimated amortization expense for 2019	5.9
Estimated amortization expense for 2020	5.9
Estimated amortization expense for 2021	5.9
Estimated amortization expense for 2022	5.5
Estimated amortization expense for 2023	5.1
Depreciation and Amortization Expense Adjustment
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization expense of intangible assets	$ 6.1	3.8	$ 1.3
Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life (years)	5 years
Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life (years)	15 years
Rights-of-way
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	$ 30.0	30.1
Line space history
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	11.3	9.6
Liquor licenses
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	8.5	8.5
Refinery permits
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	$ 2.2	$ 2.1
Supply contract
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life (years)	11 years 6 months	11 years 6 months
Intangible Assets, Gross	$ 12.2	$ 12.2
Accumulated Amortization	(12.2)	(12.2)
Intangible assets, net	$ 0.0	$ 0.0
Third-party fuel supply agreement
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life (years)	10 years	10 years
Intangible Assets, Gross	$ 49.0	$ 49.0
Accumulated Amortization	(7.4)	(2.4)
Intangible assets, net	$ 41.6	$ 46.6
Capacity contract
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life (years)	8 years	8 years
Intangible Assets, Gross	$ 9.3	$ 9.3
Accumulated Amortization	(9.3)	(9.2)
Intangible assets, net	$ 0.0	$ 0.1
Fuel trade name
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life (years)	5 years	5 years
Intangible Assets, Gross	$ 4.0	$ 4.0
Accumulated Amortization	(1.2)	(0.4)
Intangible assets, net	2.8	3.6
Below market leases
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	8.3	0.6
Accumulated Amortization	(0.3)	(0.1)
Intangible assets, net	$ 8.0	$ 0.5
Below market leases | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life (years)	13 years
Below market leases | Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life (years)	15 years