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Related Party Transactions
9 Months Ended
Sep. 30, 2018
Related Party Transactions [Abstract]  
Related Party Transactions
Note 19—Related Party Transactions
Our related parties primarily include equity method investments and certain trusts for the benefit of employees.
Significant transactions with our equity affiliates were:
Millions of Dollars
Three Months EndedNine Months Ended
September 30September 30
2018201720182017
Operating revenues and other income $27247483
Purchases25267474
Operating expenses and selling, general and administrative
expenses13164442
Net interest (income) expense*(4)(4)(11)(10)
*We paid interest to, or received interest from, various affiliates. See Note 6—Investments, Loans and Long-Term Receivables, for additional
information on loans to affiliated companies.