Related Party Transactions (Tables)	3 Months Ended
Mar. 31, 2021
Related Party Transactions [Abstract]
Significant transactions with related parties	Note 15—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 March 31 2021 2020 Operating revenues and other income $ 17 17 Operating expenses and selling, general and administrative expenses 26 15 Net interest (income) expense* (1) (2) *We paid interest to, or received interest from, various affiliates. See Note 4—Investments, Loans and Long-Term Receivables, for additional information on loans to affiliated companies.

Related Party Transactions (Tables)

3 Months Ended

Mar. 31, 2021

Note 15—Related Party Transactions

Our related parties primarily include equity method

investments and certain trusts for the benefit

employees.

Significant transactions with our equity affiliates

were:

Millions of Dollars

Three Months Ended

March 31

2021

2020

Operating revenues and other income

Operating expenses and selling, general and administrative

expenses

Net interest (income) expense*

(1)

(2)

*We paid interest to, or received interest from,

various affiliates.

See Note 4—Investments, Loans and Long-Term Receivables, for additional

information on loans to affiliated companies.