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Investment in Cenovus Energy (Tables) | 12 Months Ended
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Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract] |
Gains and Losses Recorded in Other Income (Loss) |
| Millions of Dollars
| 2022 | 2021 | 2020
Total Net gain (loss) on equity securities | $ | 251 |  | 1,040 |  | (855) |
Less: Net gain (loss) on equity securities sold during the period | 251 |  | 473 |  |
Unrealized gain (loss) on equity securities still held at the reporting date | $ |  |  | 567 |  | (855) |

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- Definition Tabular disclosure of unrealized gains and losses on investments. + References No definition available. + Details
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