Investment in Cenovus Energy (Tables) |
6 Months Ended |
|---|---|
Jun. 30, 2021 | |
| Cenovus Energy Inc [Member] | |
| Schedule Of Available For Sale Securities [Line Items] | |
| Gains and Losses Recorded in Other Income (Loss) | Gains and losses recorded in other income (loss) Millions of Dollars Three Months Ended Six Months Ended June 30 June 30 2021 2020 2021 2020 Total net gain (loss) on equity securities $ 418 551 726 (1,140) Less: Net gain on equity securities sold during (31) - (60) - Unrealized gain (loss) on equity securities still $ 387 551 666 (1,140) |