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Inventories (Tables) | 12 Months Ended
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Dec. 31, 2020
Classes Of Inventories [Abstract] |
Disclosure Of Detailed Information About Inventories Explanatory |
As at December 31, | 2020 |  |  | 2019 |
Product |  |  |  |  |  |  |
Refining and Marketing |  | 613 |  |  |  | 874 |
Oil Sands |  | 382 |  |  |  | 570 |
Conventional |  | 1 |  |  |  | 1 |
Parts and Supplies |  | 93 |  |  |  | 87 |
|  | 1,089 |  |  |  | 1,532 |

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