Related Party Transactions (Tables)

3 Months Ended

Mar. 31, 2018

Related Party Transactions [Abstract]

Related Party Transactions [table text block]

The following table provides a summary of the related party activity included in the consolidated statements of operations:

	Three Months Ended March 31,
	2018		2017
Operating revenues	$	23	$	4
Operating and maintenance	1		2
General and administrative	6		6
Interest income — affiliates	—		4