Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2015

Accounting Policies [Abstract]

Schedule of Revenues

Revenues for the indicated years comprise the following:

	2015		2014		2013
Transportation Revenue - third party	$	214.3	$	146.5	$	55.1
Transportation Revenue - related party		96.2		86.1		71.5
Total transportation revenue		310.5		232.6		126.6
Storage services revenue - third party		8.5		8.5		9.9
Storage services revenue - related party		7.5		9.2		11.3
Total storage revenue		16.0		17.7		21.2
Total revenue	$	326.5	$	250.3	$	147.8

Summary of Net Purchase Cost Adjustment and Amortization of Equity Method Investment

The following table shows our net purchase cost adjustment and amortization of such regarding our equity method investments as of 2015 and 2014:

	Mars		Bengal (1)			Poseidon (2)		Total
Acquired on November 3, 2014	$	12.2	$	(6.3	)	$	—	$	5.9
Amortization		0.1		—			—		0.1
Balance as of December 31, 2014		12.1		(6.3	)		—		5.8
July 2015 Acquisition		—		—			10.7		10.7
Amortization		1.0		(0.3	)		0.4		1.1
Balance as of December 31, 2015	$	11.1	$	(6.0	)	$	10.3	$	15.4

⁽¹⁾ Our equity investment balance is recorded net of a deferred gain upon the formation of the joint venture in Bengal.

⁽²⁾  We acquired an equity interest in Poseidon on July 1, 2015. For additional information regarding this transaction, see Note 3 - Acquisitions.

Schedule of Change in Asset Retirement Obligations

A reconciliation of changes in asset retirement obligations for 2015 and 2014 is as follows:

	2015		2014
Balance at beginning of year	$	1.3	$	1.2
Accretion expense		—		0.1
Balance at end of year	$	1.3	$	1.3