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Related Party Transactions (Tables)
12 Months Ended
Dec. 31, 2023
Related Party Transactions [Abstract]  
Significant Transactions with Related Parties
Significant transactions with our equity affiliates were:
Millions of Dollars
202320222021
Operating revenues and other income$90 88 88 
Purchases 
Operating expenses and selling, general and administrative expenses282 189 196 
Net interest (income)/loss* (1)(2)
*We paid interest to, or received interest from, various affiliates. See Note 4, for additional information on loans to affiliated companies.