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Property, Plant and Equipment - Detailed information about property, plant and equipment (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment at beginning of period | $ 65,752 |
Property, plant and equipment at end of period | 66,400 | $ 65,752
Cost |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment at beginning of period | 131,895 | 129,789
Additions/Acquisitions | 5,960 | 3,340
Transfers from E&E assets | 223 | 194
Derecognitions and other | (909) | (1,158)
Disposals |  | (92)
Foreign exchange adjustments and other | 87 | 178
Property, plant and equipment at end of period | 137,082 | 131,895
Accumulated depletion and depreciation |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment at beginning of period | (66,143) | (61,746)
Derecognitions and other | 909 | 1,158
Disposals |  | 63
Foreign exchange adjustments and other | (60) | (174)
Expense | 5,508 | 5,792
Property, plant and equipment at end of period | (70,682) | (66,143)
Operating segments | North America |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment at beginning of period | 24,356 |
Property, plant and equipment at end of period | 25,102 | 24,356
Operating segments | North America | Cost |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment at beginning of period | 73,997 | 72,627
Additions/Acquisitions | 4,146 | 1,789
Transfers from E&E assets | 73 | 194
Derecognitions and other | (382) | (521)
Disposals |  | (92)
Foreign exchange adjustments and other | 0 | 0
Property, plant and equipment at end of period | 77,834 | 73,997
Operating segments | North America | Accumulated depletion and depreciation |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment at beginning of period | (49,641) | (46,577)
Derecognitions and other | 382 | 521
Disposals |  | 63
Foreign exchange adjustments and other | 5 | (28)
Expense | 3,468 | 3,676
Property, plant and equipment at end of period | (52,732) | (49,641)
Operating segments | North Sea |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment at beginning of period | 1,430 |
Property, plant and equipment at end of period | 1,487 | 1,430
Operating segments | North Sea | Cost |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment at beginning of period | 7,283 | 7,296
Additions/Acquisitions | 208 | 104
Transfers from E&E assets | 0 | 0
Derecognitions and other | 3 | (3)
Disposals |  | 0
Foreign exchange adjustments and other | 56 | 114
Property, plant and equipment at end of period | 7,438 | 7,283
Operating segments | North Sea | Accumulated depletion and depreciation |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment at beginning of period | (5,853) | (5,712)
Derecognitions and other | (3) | 3
Disposals |  | 0
Foreign exchange adjustments and other | (54) | (103)
Expense | 149 | 247
Property, plant and equipment at end of period | (5,951) | (5,853)
Operating segments | Offshore Africa |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment at beginning of period | 1,141 |
Property, plant and equipment at end of period | 1,057 | 1,141
Operating segments | Offshore Africa | Cost |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment at beginning of period | 3,963 | 3,933
Additions/Acquisitions | 48 | 94
Transfers from E&E assets | 0 | 0
Derecognitions and other | 0 | 0
Disposals |  | 0
Foreign exchange adjustments and other | 31 | 64
Property, plant and equipment at end of period | 3,980 | 3,963
Operating segments | Offshore Africa | Accumulated depletion and depreciation |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment at beginning of period | (2,822) | (2,712)
Derecognitions and other | 0 | 0
Disposals |  | 0
Foreign exchange adjustments and other | (17) | (51)
Expense | 118 | 161
Property, plant and equipment at end of period | (2,923) | (2,822)
Operating segments | Oil Sands Mining and Upgrading |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment at beginning of period | 38,421 |
Property, plant and equipment at end of period | 38,357 | 38,421
Operating segments | Oil Sands Mining and Upgrading | Cost |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment at beginning of period | 45,710 | 45,016
Additions/Acquisitions | 1,526 | 1,328
Transfers from E&E assets | 150 | 0
Derecognitions and other | (530) | (634)
Disposals |  | 0
Foreign exchange adjustments and other | 0 | 0
Property, plant and equipment at end of period | 46,856 | 45,710
Operating segments | Oil Sands Mining and Upgrading | Accumulated depletion and depreciation |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment at beginning of period | (7,289) | (6,247)
Derecognitions and other | 530 | 634
Disposals |  | 0
Foreign exchange adjustments and other | 7 | 8
Expense | 1,733 | 1,668
Property, plant and equipment at end of period | (8,499) | (7,289)
Operating segments | Midstream and Refining |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment at beginning of period | 289 |
Property, plant and equipment at end of period | 283 | 289
Operating segments | Midstream and Refining | Cost |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment at beginning of period | 457 | 451
Additions/Acquisitions | 9 | 6
Transfers from E&E assets | 0 | 0
Derecognitions and other | 0 | 0
Disposals |  | 0
Foreign exchange adjustments and other | 0 | 0
Property, plant and equipment at end of period | 466 | 457
Operating segments | Midstream and Refining | Accumulated depletion and depreciation |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment at beginning of period | (168) | (153)
Derecognitions and other | 0 | 0
Disposals |  | 0
Foreign exchange adjustments and other | 0 | 0
Expense | 15 | 15
Property, plant and equipment at end of period | (183) | (168)
Head office |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment at beginning of period | 115 |
Property, plant and equipment at end of period | 114 | 115
Head office | Cost |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment at beginning of period | 485 | 466
Additions/Acquisitions | 23 | 19
Transfers from E&E assets | 0 | 0
Derecognitions and other | 0 | 0
Disposals |  | 0
Foreign exchange adjustments and other | 0 | 0
Property, plant and equipment at end of period | 508 | 485
Head office | Accumulated depletion and depreciation |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment at beginning of period | (370) | (345)
Derecognitions and other | 0 | 0
Disposals |  | 0
Foreign exchange adjustments and other | (1) | 0
Expense | 25 | 25
Property, plant and equipment at end of period | $ (394) | $ (370)

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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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- Definition The increase (decrease) in property, plant and equipment resulting from net exchange differences arising on the translation of the financial statements from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: 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 viii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2021-en-r&anchor=para_73_e_viii&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount of tangible assets that: (a) are held for use in the production or supply of goods or services, for rental to others, or for administrative purposes; and (b) are expected to be used during more than one period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2021-01-01 -Paragraph 73 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2021-en-r&anchor=para_73_e&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 54 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_54_a&doctype=Standard -URIDate 2021-03-24 + Details
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