Related Party Transactions (Tables) |
12 Months Ended |
|---|---|
Dec. 31, 2021 | |
| Related Party Transactions [Abstract] | |
| Significant Transactions with Related Parties | Significant transactions with our equity Millions of Dollars 2021 2020 2019 Operating revenues and other income $ 88 79 89 Purchases 5 - 38 Operating expenses and selling, general 196 63 65 Net interest income* (2) (5) (13) *We paid interest to, or received interest from, various affiliates. |