Sales and Other Operating Revenues (Tables) |
12 Months Ended |
|---|---|
Dec. 31, 2019 | |
| Revenue from Contract with Customer [Abstract] | |
| Disaggregation of Revenue [Table Text Block] | Millions of Dollars Millions of Dollars Millions of Dollars |
| Contract with Customer, Asset and Liability [Table Text Block] | Millions of Dollars |