Other Long-term Liabilities (Tables)

12 Months Ended

Dec. 31, 2016

Other Liabilities Noncurrent [Abstract]

Schedule of Other Long-term Liabilities

Other long-term liabilities are comprised of the following obligations:

	December 31, 2016		December 31, 2015
Asset retirement obligations	$	64.6	$	70.4
Mandatorily redeemable preferred interests		68.5		82.9
Deferred revenue		69.8		27.7
Other liabilities		12.2		5.9
Total long-term liabilities	$	215.1	$	186.9

Changes in Aggregate Asset Retirement Obligations

The changes in our ARO are as follows:

	2016			2015
Beginning of period	$	70.4		$	57.3
Fair value of ARO acquired with APL merger		—			4.0
Change in cash flow estimate		(9.1	)		3.8
Accretion expense		4.6			5.3
Retirement of ARO		(1.3	)		—
End of period	$	64.6		$	70.4

Schedule of Changes Attributable to Mandatorily Redeemable Preferred Interests

The following table shows the changes attributable to mandatorily redeemable preferred interests:

	2016			2015
Beginning of period	$	82.9		$	—
Acquired mandatorily redeemable preferred interests		—			109.3
Income attributable to mandatorily redeemable preferred interests		0.8			2.8
Change in estimated redemption value included in interest expense		(15.2	)		(30.6	)
Other activity, net		—			1.4
End of period	$	68.5		$	82.9

Components of deferred revenue

The following table shows the components of deferred revenue:

	December 31, 2016		December 31, 2015
Splitter agreement	$	43.0	$	—
Gas contract amendment		19.7		21.1
Other deferred revenue		7.1		6.6
Total deferred revenue	$	69.8	$	27.7

Changes In Deferred revenue

The following table shows the changes in deferred revenue:

	2016			2015
Beginning of period	$	27.7		$	4.1
Additions		45.2			26.3
Revenue recognized		(3.1	)		(2.7	)
End of period	$	69.8		$	27.7