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Related Party Transactions (Tables)
 9 Months Ended
Sep. 30, 2016
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
September 30,
 
Nine Months Ended
September 30,
 
2016
 
2015
 
2016
 
2015
Operating revenues
$
4

 
$
4

 
$
13

 
$
13

Operating and maintenance
4

 
4

 
11

 
12

General and administrative
6

 
8

 
20

 
24

Interest income — affiliates
9

 
6

 
23

 
7

Equity in earnings of unconsolidated affiliates
—

 
28

 
—

 
26