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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2021
Disclosure Of Summary Of Significant Accounting Policies [Abstract] |
Disclosure of Revisions to Prior Period | The following table reconciles the amounts previously reported in the Consolidated Statements of Earnings (Loss) to the corresponding revised amounts: 2020 and 2019 Revisions to the Oil Sands Segment
|  | 2020 |  | 2019
For the years ended December 31, |  | Previously Reported |  |  | Revision |  |  | Revised |  |  | Previously Reported |  |  | Revision |  |  | Revised |
Gross Sales |  |  | 8,481 |  |  |  | 323 |  |  |  | 8,804 |  |  |  | 12,739 |  |  |  | 362 |  |  |  | 13,101 |
Purchased Product |  |  | 939 |  |  |  | 323 |  |  |  | 1,262 |  |  |  | 1,869 |  |  |  | 362 |  |  |  | 2,231 |
|  |  | 7,542 |  |  |  | — |  |  |  | 7,542 |  |  |  | 10,870 |  |  |  | — |  |  |  | 10,870 |

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