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Goodwill and Other Intangible Assets - Goodwill Impairment (Details) - Oil Sands - CGU-Asset impairment testing - $ / bbl | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022
Goodwill and Other Intangible Assets |  |
After-tax discount rate applied to cash flow projections | 7.80% | 7.80%
Cash flow forecast period | P50Y |
Maximum |  |
Goodwill and Other Intangible Assets |  |
Cash flow forecast period | P55Y |
Forecast for after 2025 |  |
Goodwill and Other Intangible Assets |  |
Impairment testing assumption, price per barrel escalation percentage | 2.00% |
WTI | Forecast for 2023 |  |
Goodwill and Other Intangible Assets |  |
Impairment testing assumption, price per barrel | 76.00 |
WTI | Forecast for 2024 |  |
Goodwill and Other Intangible Assets |  |
Impairment testing assumption, price per barrel | 73.44 |
WTI | Forecast for 2025 |  |
Goodwill and Other Intangible Assets |  |
Impairment testing assumption, price per barrel | 71.79 |

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- Definition The discount rate applied to cash flow projections for a cash-generating unit (group of units). [Refer: Cash-generating units [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2023-01-01 -Paragraph 134 -Subparagraph d -Clause v -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2023-en-r&anchor=para_134_d_v&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2023-01-01 -Paragraph 134 -Subparagraph e -Clause v -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2023-en-r&anchor=para_134_e_v&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The growth rate used to extrapolate cash flow projections beyond the period covered by the most recent budgets/forecasts for a cash-generating unit (group of units). [Refer: Cash-generating units [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2023-01-01 -Paragraph 134 -Subparagraph d -Clause iv -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2023-en-r&anchor=para_134_d_iv&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2023-01-01 -Paragraph 134 -Subparagraph e -Clause iv -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2023-en-r&anchor=para_134_e_iv&doctype=Standard -URIDate 2023-03-23 + Details
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