The following table summarizes our related party transactions for the periods indicated:

	For the Three Months Ended June 30,				For the Six Months Ended June 30,
	2018		2017		2018		2017
Revenues – related parties:
Unconsolidated affiliates	$	55.6	$	9.9	$	80.3	$	20.7
Costs and expenses – related parties:
EPCO and its privately held affiliates	$	260.2	$	247.4	$	516.9	$	490.5
Unconsolidated affiliates		148.0		54.9		241.4		93.1
Total	$	408.2	$	302.3	$	758.3	$	583.6

The following table summarizes our related party accounts receivable and accounts payable balances at the dates indicated:

	June 30, 2018		December 31, 2017
Accounts receivable - related parties:
Unconsolidated affiliates	$	2.0	$	1.8

Accounts payable - related parties:
EPCO and its privately held affiliates	$	57.0	$	99.3
Unconsolidated affiliates		28.6		28.0
Total	$	85.6	$	127.3

At June 30, 2018, EPCO and its privately held affiliates (including Dan Duncan LLC and certain Duncan family trusts) beneficially owned the following limited partner interests in us:

Total Number of Units	Percentage of Total Units Outstanding
693,530,754	32%

We have no employees. All of our operating functions and general and administrative support services are provided by employees of EPCO pursuant to the ASA or by other service providers. The following table presents our related party costs and expenses attributable to the ASA with EPCO for the periods indicated:

	For the Three Months Ended June 30,				For the Six Months Ended June 30,
	2018		2017		2018		2017
Operating costs and expenses	$	228.0	$	215.9	$	451.0	$	427.5
General and administrative expenses		28.4		27.1		57.6		53.9
Total costs and expenses	$	256.4	$	243.0	$	508.6	$	481.4