Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

A summary of our identifiable intangible assets are as follows (in millions):

As of December 31, 2018	Useful Life	Gross		Accumulated Amortization			Net
Intangible Assets subject to amortization:
Supply contract	11.5 years	$	12.2	$	(12.2	)	$	—
Third-party fuel supply agreement	10 years	49.0		(7.4		)	41.6
Capacity contract	8 years	9.3		(9.3		)	—
Fuel trade name	5 years	4.0		(1.2		)	2.8
Below market leases	13 - 15 years	8.3		(0.3		)	8.0
Intangible assets not subject to amortization:
Rights-of-way	Indefinite	30.0					30.0
Line space history	Indefinite	11.3					11.3
Liquor licenses	Indefinite	8.5					8.5
Refinery permits	Indefinite	2.2					2.2
Total		$	134.8	$	(30.4	)	$	104.4

As of December 31, 2017	Useful Life	Gross		Accumulated Amortization			Net
Intangible Assets subject to amortization:
Supply contract	11.5 years	$	12.2	$	(12.2	)	$	—
Third-party fuel supply agreement	10 years	49.0		(2.4		)	46.6
Capacity contract	8 years	9.3		(9.2		)	0.1
Fuel trade name	5 years	4.0		(0.4		)	3.6
Below market leases	13 - 15 years	0.6		(0.1		)	0.5
Intangible assets not subject to amortization:
Rights-of-way	Indefinite	30.1					30.1
Line space history	Indefinite	9.6					9.6
Liquor licenses	Indefinite	8.5					8.5
Refinery permits	Indefinite	2.1					2.1
Total		$	125.4	$	(24.3	)	$	101.1

Schedule of Amortization Expense

Amortization expense for the next five years is estimated to be as follows:

2019	$	5.9
2020	5.9
2021	5.9
2022	5.5
2023	5.1