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Related Party Transactions (Tables)
 6 Months Ended
Jun. 30, 2017
Oxy  
Related Party Transaction [Line Items]  
Schedule of related party transactions
The impact to our Condensed Consolidated Statements of Operations from those transactions is included below (in millions):
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
2017
 
2016
 
2017
 
2016
Revenues
$
220

 
$
142

 
$
453

 
$
254

 
 
 
 
 
 
 
 
Purchases and related costs (1)
$
(61
)
 
$
(4
)
 
$
(101
)
 
$
(50
)
 
(1) 
Purchases and related costs include crude oil buy/sell transactions that are accounted for as inventory exchanges and are presented net in our Condensed Consolidated Statements of Operations.
 
We currently have a netting arrangement with Oxy. Our gross receivable and payable amounts with Oxy were as follows (in millions):
 
June 30,
2017
 
December 31, 2016
Trade accounts receivable and other receivables
$
804

 
$
789

 
 
 
 
Accounts payable
$
748

 
$
836