During the three years ended December 31, 2018, we recognized sales and transportation revenues and purchased petroleum products from both our principal owners and our equity method investees. These transactions were conducted at posted tariff rates or prices that we believe approximate market. Included in these transactions was a crude oil buy/sell agreement that includes a multi-year minimum volume commitment. The impact to our Consolidated Statements of Operations from these transactions is included below (in millions):



	Year Ended December 31,
	2018		2017		2016
Revenues from related parties ^{(1) (2)}	$	1,067	$	927	$	678

Purchases and related costs from related parties ⁽²⁾	$	410	$	286	$	360


⁽¹⁾	A majority of these revenues are included in “Supply and Logistics segment revenues” on our Consolidated Statements of Operations.


⁽²⁾	Crude oil purchases that are part of inventory exchanges under buy/sell transactions are netted with the related sales, with any margin presented in “Purchases and related costs” in our Consolidated Statements of Operations.

Our receivable and payable amounts with these related parties as reflected on our Consolidated Balance Sheets were as follows (in millions):



	December 31,
	2018		2017
Trade accounts receivable and other receivables, net from related parties ^{(1) (2)}	$	144	$	142

Trade accounts payable to related parties ^{(1) (2) (3)}	$	121	$	82


⁽¹⁾	We have a netting arrangement with certain related parties. Receivables and payables are presented net of such amounts.


⁽²⁾	Includes amounts related to crude oil purchases and sales, transportation services and amounts owed to us or advanced to us related to expansion projects of equity method investees where we serve as construction manager.


⁽³⁾	We have an agreement to transport crude oil at posted tariff rates on a pipeline that is owned by an equity method investee, in which we own a 50% interest. Our commitment to transport is supported by crude oil buy/sell agreements with third parties (including Oxy) with commensurate quantities.