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 Ended

Six Months Ended

June 30

2019

2018

2019

2018

Operating revenues and other income

$

26

24

47

Purchases

17

25

38

49

Operating expenses and selling, general and administrative

expenses

14

16

28

31

Net interest (income) expense*

(3)

(4)

(7)

*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.