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Related Party Transactions (Tables) | 9 Months Ended
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Sep. 30, 2018
Related Party Transactions [Abstract] |
Significant transactions with related parties |
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 |  | Nine Months Ended
| September 30 | September 30
|  | 2018 |  | 2017 |  | 2018 |  | 2017
Operating revenues and other income | $ | 27 |  | 24 |  | 74 |  | 83
Purchases |  | 25 |  | 26 |  | 74 |  | 74
Operating expenses and selling, general and administrative |  |  |  |  |  |  |  |
| expenses |  | 13 |  | 16 |  | 44 |  | 42
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.

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- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References No definition available. + Details
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