Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Accounting Policies [Abstract]

Schedule of Revenues

Revenues for the indicated years comprise the following:

	2016		2015		2014
Transportation revenue - third party	$	193.1	$	214.3	$	146.5
Transportation revenue - related party	81.2		96.2		86.1
Total transportation revenue	274.3		310.5		232.6
Storage services revenue - third party	8.4		8.5		8.5
Storage services revenue - related party	8.6		7.5		9.2
Total storage revenue	17.0		16.0		17.7
Total revenue	$	291.3	$	326.5	$	250.3

Schedule of Cost Method Investments

Cost method investments are reported as Cost investments in our consolidated balance sheets. Our cost investments include the following:

	December 31,
	2016			2015
	Ownership	Amount		Ownership	Amount
Colonial	6.0%	$	11.4	3.0%	$	6.2
Explorer	2.62%	26.3		—%	—
Cleopatra	1.0%	2.1		—%	—
		$	39.8		$	6.2