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Property, Plant and Equipment - Detailed information about property, plant and equipment (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Reconciliation of changes in property, plant and equipment [abstract] |  |  |
Property, plant and equipment at beginning of period | $ 64,581 |  |
Property, plant and equipment at ending of period | 73,414 | $ 64,581 |
North Sea |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |
Recoverability charge | 160 | 436 | $ 1,620
Recoverability charge, net of taxes | 21 | 113 | 651
Deferred income tax recovery | 139 | 323 | 969
Operating segments | North America |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |
Property, plant and equipment at beginning of period | 24,643 |  |
Property, plant and equipment at ending of period | 26,954 | 24,643 |
Operating segments | North Sea |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |
Property, plant and equipment at beginning of period | 224 |  |
Property, plant and equipment at ending of period | 339 | 224 |
Operating segments | Offshore Africa |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |
Property, plant and equipment at beginning of period | 1,051 |  |
Property, plant and equipment at ending of period | 1,138 | 1,051 |
Operating segments | Oil Sands Mining and Upgrading |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |
Property, plant and equipment at beginning of period | 38,270 |  |
Property, plant and equipment at ending of period | 44,580 | 38,270 |
Operating segments | Midstream and Refining |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |
Property, plant and equipment at beginning of period | 271 |  |
Property, plant and equipment at ending of period | 266 | 271 |
Head Office |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |
Property, plant and equipment at beginning of period | 122 |  |
Property, plant and equipment at ending of period | 137 | 122 |
Cost |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |
Property, plant and equipment at beginning of period | 146,923 | 142,407 |
Additions/Acquisitions |  | 5,824 |
Additions | 6,152 |  |
Acquisition of Chevron's assets | 8,901 |  |
Transfers from exploration and evaluation assets | 52 | 63 |
Derecognitions | 1,063 | 1,051 |
Foreign exchange adjustments and other | 1,200 | (320) |
Property, plant and equipment at ending of period | 162,165 | 146,923 | 142,407
Cost | Operating segments | North America |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |
Property, plant and equipment at beginning of period | 83,483 | 81,075 |
Additions/Acquisitions |  | 2,951 |
Additions | 3,440 |  |
Acquisition of Chevron's assets | 2,585 |  |
Transfers from exploration and evaluation assets | 45 | 38 |
Derecognitions | 589 | 581 |
Foreign exchange adjustments and other | 0 | 0 |
Property, plant and equipment at ending of period | 88,964 | 83,483 | 81,075
Cost | Operating segments | North Sea |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |
Property, plant and equipment at beginning of period | 8,606 | 8,258 |
Additions/Acquisitions |  | 558 |
Additions | 352 |  |
Acquisition of Chevron's assets | 0 |  |
Transfers from exploration and evaluation assets | 0 | 0 |
Derecognitions | 18 | 0 |
Foreign exchange adjustments and other | 791 | (210) |
Property, plant and equipment at ending of period | 9,731 | 8,606 | 8,258
Cost | Operating segments | Offshore Africa |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |
Property, plant and equipment at beginning of period | 4,409 | 4,332 |
Additions/Acquisitions |  | 187 |
Additions | 205 |  |
Acquisition of Chevron's assets | 0 |  |
Transfers from exploration and evaluation assets | 0 | 0 |
Derecognitions | 0 | 0 |
Foreign exchange adjustments and other | 409 | (110) |
Property, plant and equipment at ending of period | 5,023 | 4,409 | 4,332
Cost | Operating segments | Oil Sands Mining and Upgrading |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |
Property, plant and equipment at beginning of period | 49,375 | 47,732 |
Additions/Acquisitions |  | 2,088 |
Additions | 2,103 |  |
Acquisition of Chevron's assets | 6,316 |  |
Transfers from exploration and evaluation assets | 7 | 25 |
Derecognitions | 456 | 470 |
Foreign exchange adjustments and other | 0 | 0 |
Property, plant and equipment at ending of period | 57,345 | 49,375 | 47,732
Cost | Operating segments | Midstream and Refining |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |
Property, plant and equipment at beginning of period | 484 | 474 |
Additions/Acquisitions |  | 10 |
Additions | 11 |  |
Acquisition of Chevron's assets | 0 |  |
Transfers from exploration and evaluation assets | 0 | 0 |
Derecognitions | 0 | 0 |
Foreign exchange adjustments and other | 0 | 0 |
Property, plant and equipment at ending of period | 495 | 484 | 474
Cost | Head Office |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |
Property, plant and equipment at beginning of period | 566 | 536 |
Additions/Acquisitions |  | 30 |
Additions | 41 |  |
Acquisition of Chevron's assets | 0 |  |
Transfers from exploration and evaluation assets | 0 | 0 |
Derecognitions | 0 | 0 |
Foreign exchange adjustments and other | 0 | 0 |
Property, plant and equipment at ending of period | 607 | 566 | 536
Accumulated depletion and depreciation |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |
Property, plant and equipment at beginning of period | (82,342) | (77,548) |
Expense | 6,157 | 5,704 |
Derecognitions | (1,063) | (1,051) |
Recoverability charge | 160 | 436 |
Foreign exchange adjustments and other | 1,155 | (295) |
Property, plant and equipment at ending of period | (88,751) | (82,342) | (77,548)
Accumulated depletion and depreciation | Operating segments | North America |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |
Property, plant and equipment at beginning of period | (58,840) | (55,835) |
Expense | 3,741 | 3,592 |
Derecognitions | (589) | (581) |
Recoverability charge | 0 | 0 |
Foreign exchange adjustments and other | 18 | (6) |
Property, plant and equipment at ending of period | (62,010) | (58,840) | (55,835)
Accumulated depletion and depreciation | Operating segments | North Sea |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |
Property, plant and equipment at beginning of period | (8,382) | (8,106) |
Expense | 96 | 40 |
Derecognitions | (18) | 0 |
Recoverability charge | 160 | 436 | 1,620
Foreign exchange adjustments and other | 772 | (200) |
Property, plant and equipment at ending of period | (9,392) | (8,382) | (8,106)
Accumulated depletion and depreciation | Operating segments | Offshore Africa |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |
Property, plant and equipment at beginning of period | (3,358) | (3,277) |
Expense | 192 | 177 |
Derecognitions | 0 | 0 |
Recoverability charge | 0 | 0 |
Foreign exchange adjustments and other | 335 | (96) |
Property, plant and equipment at ending of period | (3,885) | (3,358) | (3,277)
Accumulated depletion and depreciation | Operating segments | Oil Sands Mining and Upgrading |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |
Property, plant and equipment at beginning of period | (11,105) | (9,712) |
Expense | 2,086 | 1,856 |
Derecognitions | (456) | (470) |
Recoverability charge | 0 | 0 |
Foreign exchange adjustments and other | 30 | 7 |
Property, plant and equipment at ending of period | (12,765) | (11,105) | (9,712)
Accumulated depletion and depreciation | Operating segments | Midstream and Refining |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |
Property, plant and equipment at beginning of period | (213) | (198) |
Expense | 16 | 15 |
Derecognitions | 0 | 0 |
Recoverability charge | 0 | 0 |
Foreign exchange adjustments and other | 0 | 0 |
Property, plant and equipment at ending of period | (229) | (213) | (198)
Accumulated depletion and depreciation | Head Office |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |
Property, plant and equipment at beginning of period | (444) | (420) |
Expense | 26 | 24 |
Derecognitions | 0 | 0 |
Recoverability charge | 0 | 0 |
Foreign exchange adjustments and other | 0 | 0 |
Property, plant and equipment at ending of period | $ (470) | $ (444) | $ (420)

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- Definition The increase in property, plant and equipment resulting from acquisitions through business combinations. [Refer: Total for all business combinations [member]; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2024-01-01 -Paragraph 73 -Subparagraph e -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e_iii&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of additions to property, plant and equipment other than those acquired through business combinations. [Refer: Total for all business combinations [member]; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2024-01-01 -Paragraph 73 -Subparagraph e -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e_i&doctype=Standard -URIDate 2024-03-27 + Details
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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 2024-01-01 -Paragraph 73 -Subparagraph e -Clause vii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e_vii&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2024-01-01 -Paragraph 75 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_75_a&doctype=Standard -URIDate 2024-03-27 + 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 2024-01-01 -Paragraph 73 -Subparagraph e -Clause viii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e_viii&doctype=Standard -URIDate 2024-03-27 + 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. Note that right-of-use assets are not included. [Contrast: Property, plant and equipment including right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2024-01-01 -Paragraph 73 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 54 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_a&doctype=Standard -URIDate 2024-03-27 + Details
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