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Oil and Gas Properties - Schedule of PPE Activity, Oil and Gas (Details) - CAD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Reconciliation of changes in property, plant and equipment [abstract] |  |  |  |
Impairment | $ 1,126,415 | $ 416,000 |  |
Oil and gas assets |  |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |  |
Balance, beginning of year | 3,077,548 | 3,077,548 | $ 5,387,889 |
Capital expenditures |  | 310,005 | 275,850 |
Property acquisitions |  | 274 |  |
Divestitures |  | (4,991) |  |
Transfers from exploration and evaluation assets |  | 7,727 | 8,585 |
Change is asset retirement obligations |  | (12,222) | 94,994 |
Property swaps |  | (231) | (1,012) |
Impairment |  | 1,542,414 |  | $ (2,247,162)
Foreign currency translation |  | 2,788 | 37,263 |
Depletion |  | (458,941) | (478,859) |
Balance, end of year |  | 4,464,371 | 3,077,548 | 5,387,889
Oil and gas assets | Cost |  |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |  |
Balance, beginning of year | 11,423,676 | 11,423,676 | 11,128,297 |
Capital expenditures |  | 310,005 | 275,850 |
Property acquisitions |  | 274 |  |
Divestitures |  | (37,835) |  |
Transfers from exploration and evaluation assets |  | 7,727 | 8,585 |
Change is asset retirement obligations |  | (12,222) | 94,994 |
Property swaps |  | (26,131) | (1,190) |
Impairment |  | 0 | 0 |
Foreign currency translation |  | (31,977) | (82,860) |
Depletion |  | 0 | 0 |
Balance, end of year |  | 11,633,517 | 11,423,676 | 11,128,297
Oil and gas assets | Accumulated depletion |  |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |  |
Balance, beginning of year | $ (8,346,128) | (8,346,128) | (5,740,408) |
Capital expenditures |  | 0 | 0 |
Property acquisitions |  | 0 |  |
Divestitures |  | 32,844 |  |
Transfers from exploration and evaluation assets |  | 0 | 0 |
Change is asset retirement obligations |  | 0 | 0 |
Property swaps |  | 25,900 | 178 |
Impairment |  | 1,542,414 | (2,247,162) |
Foreign currency translation |  | 34,765 | 120,123 |
Depletion |  | (458,941) | (478,859) |
Balance, end of year |  | $ (7,169,146) | $ (8,346,128) | $ (5,740,408)

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- Definition The amount of depreciation of property, plant and equipment. [Refer: Depreciation and amortisation expense; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2021-01-01 -Paragraph 73 -Subparagraph e -Clause vii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2021-en-r&anchor=para_73_e_vii&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2021-01-01 -Paragraph 75 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2021-en-r&anchor=para_75_a&doctype=Standard -URIDate 2021-03-24 + Details
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