Investments in Unconsolidated Affiliates (Tables)

3 Months Ended

Mar. 31, 2019

Equity Method Investments And Joint Ventures [Abstract]

Activity Related to Partnership's Investments and Unaudited Income Statement Information in Unconsolidated Affiliates

The following table shows the activity related to our investments in unconsolidated affiliates:

	Balance at December 31, 2018		Equity Earnings (Loss)			Cash Distributions			Contributions		Balance at March 31, 2019
GCF	$	40.3	$	4.3		$	(2.2	)	$	—	$	42.4
T2 LaSalle (1)		49.3		(1.5	)		—			—		47.8
T2 Eagle Ford (1)		99.0		(2.4	)		—			—		96.6
Cayenne		16.6		1.9			(2.6	)		—		15.9
GCX (2)		211.6		0.6			—			110.4		322.6
Little Missouri 4		67.3		—			—			7.0		74.3
Agua Blanca		6.4		(0.1	)		—			—		6.3
Total	$	490.5	$	2.8		$	(4.8	)	$	117.4	$	605.9

(1) As of March 31, 2019, $24.3 million of unamortized excess fair value over the T2 LaSalle and T2 Eagle Ford capital accounts remained. These basis differences, which are attributable to the underlying depreciable tangible gathering assets, are being amortized on a straight-line basis as components of equity earnings over the estimated 20-year useful lives of the underlying assets.

(2) Our 25% interest in GCX is owned by Targa GCX Pipeline LLC (“GCX DevCo JV”), of which we own a 20% interest. GCX DevCo JV is accounted for on a consolidated basis in our consolidated financial statements.