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(Tables)
 3 Months Ended
Mar. 31, 2020
Related Party Transactions [Abstract]  
Related Party Transactions [table text block]
The following table provides a summary of the related party activity included in our consolidated statements of operations:
 
Three Months Ended
March 31,
 
2020
 
2019
Operating revenues
$
22

 
$
24

Operating and maintenance
3

 
1

General and administrative
7

 
4

Interest expense — related company
9

 
4