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Exploration and Evaluation Assets - Impairment Booked for Cash Generating Untis (Details) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2020 CAD ($) cashGeneratingUnit | Jun. 30, 2021 CAD ($) cashGeneratingUnit | Dec. 31, 2021 CAD ($) cashGeneratingUnit | Dec. 31, 2020 CAD ($) cashGeneratingUnit
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Number of cash generating units | cashGeneratingUnit | 6 | 6 | 5 | 6
Impairment loss (reversal of impairment loss) recognised in profit or loss |  | $ (1,126,415,000) | $ (416,000,000) |
Conventional CGU |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Impairment loss (reversal of impairment loss) recognised in profit or loss |  | (15,000,000) | (19,000,000) |
Peace River CGU |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Impairment loss (reversal of impairment loss) recognised in profit or loss |  | (154,000,000) | (251,000,000) |
Lloydminster CGU |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Impairment loss (reversal of impairment loss) recognised in profit or loss |  | (154,000,000) | (146,000,000) |
Viking CGU |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Impairment loss (reversal of impairment loss) recognised in profit or loss |  | (356,000,000) | 0 |
Eagle Ford CGU |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Impairment loss (reversal of impairment loss) recognised in profit or loss |  | $ (442,415,000) | $ 0 |
Conventional, Peace River, Lloydminster, And Duvernay |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Impairment loss (reversal of impairment loss) recognised in profit or loss |  |  |  | $ 0
Exploration and evaluation assets |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Impairment loss on financial assets | $ 127,861,000 |  |  |
Exploration and evaluation assets | Conventional CGU |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Impairment loss on financial assets | 4,000,000 |  |  |
Exploration and evaluation assets | Peace River CGU |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Impairment loss on financial assets | 20,000,000 |  |  |
Exploration and evaluation assets | Lloydminster CGU |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Impairment loss on financial assets | 42,000,000 |  |  |
Exploration and evaluation assets | Viking CGU |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Impairment loss on financial assets | 13,000,000 |  |  |
Exploration and evaluation assets | Eagle Ford CGU |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Impairment loss on financial assets | $ 48,861,000 |  |  |

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- Definition The amount of impairment loss on financial assets. [Refer: Financial assets; Impairment loss] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2023-01-01 -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 20 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_20_e&doctype=Standard&book=b -URIDate 2021-03-24 + Details
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