Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2018

Activity associated with the Company’s related party arrangements for the years ended December 31, 2018, 2017, and 2016 is summarized below:



Expenses with related parties	Year ended December 31,
(in millions)	2018		2017		2016
Cost of materials and other
Joint Venture Transportation Agreement:
Enable JV	$	8	$	2	$	—

Payments made
Dividends (1)	179		$	142	142
Tax Allocation Agreement with AEP	12		15		45



Amounts due to/from related parties
(in millions)	December 31, 2018		December 31, 2017
Accounts Receivable (Payable)
Tax Allocation Agreement with AEP	$	4	$	5

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(1) See below for a summary of the dividends paid to IEP for the periods ended December 31, 2018, 2017, and 2016.

Schedule of dividends paid

The following is a summary of the quarterly and special dividends paid to stockholders, including IEP and its affiliates during the years ended December 31, 2018 and 2017:



(in millions)	December 31, 2017		March 31, 2018		June 30, 2018		September 30, 2018		Total Dividends Paid in 2018
Amount paid to IEP	$	36	$	36	$	53	$	54	$	179
Amounts paid to public stockholders	7		8		22		22		59
Total amount paid	$	43	$	44	$	75	$	76	$	238

Per common share	$	0.50	$	0.50	$	0.75	$	0.75	$	2.50



(in millions)	December 31, 2016		March 31, 2017		June 30, 2017		September 30, 2017		Total Dividends Paid in 2017
Amount paid to IEP	$	35	$	36	$	35	$	36	$	142
Amounts paid to public stockholders	8		8		8		8		32
Total amount paid	$	43	$	44	$	43	$	44	$	174

Per common share	$	0.50	$	0.50	$	0.50	$	0.50	$	2.00



(in millions)	December 31, 2015		March 31, 2016		June 30, 2016		September 30, 2016		Total Dividends Paid in 2016
Amount paid to IEP	$	35	$	36	$	35	$	36	$	142
Amounts paid to public stockholders	8		8		8		8		32
Total amount paid	$	43	$	44	$	43	$	44	$	174

Per common share	$	0.50	$	0.50	$	0.50	$	0.50	$	2.00