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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2023
Goodwill and Other Intangible Assets |
Segment breakdown of Goodwill and Other Intangible Assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Refining and | ​ | ​ | ​ | ​ | ​
​ |  | Oil Sands |  | Marketing |  | Other |  | ​ |
($ millions) | ​ | Goodwill | ​ | Goodwill | ​ | Intangibles | ​ | Total | ​
At December 31, 2021 |  | 2 752 |  | 140 |  | 631 |  | 3 523 | ​
Additions | ​ | - | ​ | - | ​ | 140 | ​ | 140 | ​
Amortization | ​ | - | ​ | - | ​ | (57) | ​ | (57) | ​
Reclassified to assets held for sale (note 33) |  | - | ​ | - | ​ | (20) | ​ | (20) | ​
At December 31, 2022 |  | 2 752 |  | 140 |  | 694 |  | 3 586 | ​
Additions | ​ | - | ​ | - | ​ | 22 | ​ | 22 | ​
Amortization | ​ | - | ​ | - | ​ | (80) | ​ | (80) | ​
At December 31, 2023 |  | 2 752 |  | 140 |  | 636 |  | 3 528 | ​

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- Definition The disclosure of the reconciliation of changes in intangible assets and goodwill. [Refer: Intangible assets and goodwill] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 38 -IssueDate 2023-01-01 -Paragraph 118 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2023-en-r&anchor=para_118&doctype=Standard -URIDate 2023-03-23 + Details
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