The following table presents our investments in unconsolidated affiliates by business segment at the dates indicated. We account for these investments using the equity method.

	Ownership Interest at December 31,	December 31,
	2018	2018		2017
NGL Pipelines & Services:
Venice Energy Service Company, L.L.C. (“VESCO”)	13.1%	$	24.1	$	25.7
K/D/S Promix, L.L.C. (“Promix”)	50%		28.9		30.9
Baton Rouge Fractionators LLC (“BRF”)	32.2%		16.3		17.0
Skelly-Belvieu Pipeline Company, L.L.C. (“Skelly-Belvieu”)	50%		35.6		37.0
Texas Express Pipeline LLC (“Texas Express”)	35%		337.6		314.4
Texas Express Gathering LLC (“TEG”)	45%		43.6		35.9
Front Range Pipeline LLC (“Front Range”)	33.3%		175.9		165.7
Delaware Basin Gas Processing LLC (“Delaware Processing”) (1)	100%		--		107.3
Crude Oil Pipelines & Services:
Seaway Crude Pipeline Company LLC (“Seaway”)	50%		1,369.7		1,378.9
Eagle Ford Pipeline LLC (“Eagle Ford Crude Oil Pipeline”)	50%		388.7		385.2
Eagle Ford Terminals Corpus Christi LLC (“Eagle Ford Corpus Christi”)	50%		109.1		75.1
Natural Gas Pipelines & Services:
White River Hub, LLC (“White River Hub”)	50%		20.1		20.8
Old Ocean Pipeline, LLC (“Old Ocean”)	50%		2.7		--
Petrochemical & Refined Products Services:
Centennial Pipeline LLC (“Centennial”)	50%		59.1		60.8
Baton Rouge Propylene Concentrator LLC (“BRPC”)	30%		3.2		4.1
Transport 4, LLC (“Transport 4”)	25%		0.5		0.6
Total		$	2,615.1	$	2,659.4

(1)In March 2018, we acquired the remaining 50% membership interest in our Delaware Processing joint venture. See Note 12 for information regarding this acquisition.

The following table presents our equity in income (loss) of unconsolidated affiliates by business segment for the years indicated:

	For the Year Ended December 31,
	2018			2017			2016
NGL Pipelines & Services	$	117.0		$	73.4		$	61.4
Crude Oil Pipelines & Services		365.4			358.4			311.9
Natural Gas Pipelines & Services		6.8			3.8			3.8
Petrochemical & Refined Products Services (1)		(9.2	)		(9.6	)		(15.1	)
Total	$	480.0		$	426.0		$	362.0

(1)Losses are primarily attributable to our investment in Centennial. As a result of a trend in declining earnings, we estimated the fair value of this equity-method investment during each of the last three fiscal years. Our estimates, based on a combination of market and income approaches, indicate that the fair value of this investment remains in excess of its carrying value.

	December 31,
	2018		2017
NGL Pipelines & Services	$	21.7	$	22.9
Crude Oil Pipelines & Services		17.4		18.2
Petrochemical & Refined Products Services		1.7		1.8
Total	$	40.8	$	42.9

Summarized Combined Financial Information of Unconsolidated Affiliates

Combined balance sheet information for the last two years and results of operations data for the last three years for our unconsolidated affiliates are summarized in the following table (all data presented on a 100% basis):

	December 31,
	2018		2017
Balance Sheet Data:
Current assets	$	350.2	$	288.8
Property, plant and equipment, net		5,359.1		5,509.7
Other assets		80.4		71.2
Total assets	$	5,789.7	$	5,869.7

Current liabilities	$	220.6	$	233.5
Other liabilities		77.9		84.8
Combined equity		5,491.2		5,551.4
Total liabilities and combined equity	$	5,789.7	$	5,869.7

	For the Year Ended December 31,
	2018		2017		2016
Income Statement Data:
Revenues	$	1,721.3	$	1,509.0	$	1,342.0
Operating income		1,074.6		925.9		786.7
Net income		1,069.1		929.5		781.7