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Impairment Charges (Tables) | 9 Months Ended
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Sep. 30, 2021
Disclosure of impairment loss recognised or reversed for cash-generating unit [abstract] |
Summary of Impairment Losses and Estimated Recoverable Amounts | The following table summarizes the impairment losses for the three months ended March 31, 2020, and estimated recoverable amounts as at March 31, 2020, by CGU:
Cash-Generating Unit | Impairment Amount |  |  | Recoverable Amount |
Clearwater |  | 140 |  |  |  | 306 |
Kaybob-Edson |  | 175 |  |  |  | 414 |

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