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Segmented Information - Disaggregation of Revenue (Details) - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Segmented Information |  |
Total Gross Revenue from Contracts with Customers | $ 52,206 | $ 62,907
North America |  |
Segmented Information |  |
Total Gross Revenue from Contracts with Customers | 51,206 | 61,040
International |  |
Segmented Information |  |
Total Gross Revenue from Contracts with Customers | 1,000 | 1,867
Operating segments | Oil Sands |  |
Segmented Information |  |
Total Gross Revenue from Contracts with Customers | 26,035 | 30,431
Operating segments | Oil Sands | Synthetic crude oil and diesel |  |
Segmented Information |  |
Total Gross Revenue from Contracts with Customers | 18,817 | 22,539
Operating segments | Oil Sands | Bitumen |  |
Segmented Information |  |
Total Gross Revenue from Contracts with Customers | 7,218 | 7,892
Operating segments | Oil Sands | North America |  |
Segmented Information |  |
Total Gross Revenue from Contracts with Customers | 26,035 | 30,431
Operating segments | Oil Sands | North America | Synthetic crude oil and diesel |  |
Segmented Information |  |
Total Gross Revenue from Contracts with Customers | 18,817 | 22,539
Operating segments | Oil Sands | North America | Bitumen |  |
Segmented Information |  |
Total Gross Revenue from Contracts with Customers | 7,218 | 7,892
Operating segments | Exploration and Production |  |
Segmented Information |  |
Total Gross Revenue from Contracts with Customers | 2,689 | 4,331
Operating segments | Exploration and Production | Crude oil and natural gas liquids |  |
Segmented Information |  |
Total Gross Revenue from Contracts with Customers | 2,683 | 4,298
Operating segments | Exploration and Production | Natural gas |  |
Segmented Information |  |
Total Gross Revenue from Contracts with Customers | 6 | 33
Operating segments | Exploration and Production | North America |  |
Segmented Information |  |
Total Gross Revenue from Contracts with Customers | 1,689 | 2,464
Operating segments | Exploration and Production | North America | Crude oil and natural gas liquids |  |
Segmented Information |  |
Total Gross Revenue from Contracts with Customers | 1,689 | 2,464
Operating segments | Exploration and Production | International |  |
Segmented Information |  |
Total Gross Revenue from Contracts with Customers | 1,000 | 1,867
Operating segments | Exploration and Production | International | Crude oil and natural gas liquids |  |
Segmented Information |  |
Total Gross Revenue from Contracts with Customers | 994 | 1,834
Operating segments | Exploration and Production | International | Natural gas |  |
Segmented Information |  |
Total Gross Revenue from Contracts with Customers | 6 | 33
Operating segments | Refining and Marketing |  |
Segmented Information |  |
Total Gross Revenue from Contracts with Customers | 31,068 | 36,728
Operating segments | Refining and Marketing | Gasoline |  |
Segmented Information |  |
Total Gross Revenue from Contracts with Customers | 13,106 | 14,540
Operating segments | Refining and Marketing | Distillate |  |
Segmented Information |  |
Total Gross Revenue from Contracts with Customers | 15,283 | 18,663
Operating segments | Refining and Marketing | Other |  |
Segmented Information |  |
Total Gross Revenue from Contracts with Customers | 2,679 | 3,525
Operating segments | Refining and Marketing | North America |  |
Segmented Information |  |
Total Gross Revenue from Contracts with Customers | 31,068 | 36,728
Operating segments | Refining and Marketing | North America | Gasoline |  |
Segmented Information |  |
Total Gross Revenue from Contracts with Customers | 13,106 | 14,540
Operating segments | Refining and Marketing | North America | Distillate |  |
Segmented Information |  |
Total Gross Revenue from Contracts with Customers | 15,283 | 18,663
Operating segments | Refining and Marketing | North America | Other |  |
Segmented Information |  |
Total Gross Revenue from Contracts with Customers | 2,679 | 3,525
Corporate and eliminations |  |
Segmented Information |  |
Total Gross Revenue from Contracts with Customers | (7,586) | (8,583)
Corporate and eliminations | North America |  |
Segmented Information |  |
Total Gross Revenue from Contracts with Customers | $ (7,586) | $ (8,583)

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- Definition The amount of revenue from contracts with customers. A customer is a party that has contracted with an entity to obtain goods or services that are an output of the entity’s ordinary activities in exchange for consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2023-01-01 -Paragraph 114 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2023-en-r&anchor=para_114&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2023-01-01 -Paragraph 113 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2023-en-r&anchor=para_113_a&doctype=Standard -URIDate 2023-03-23 + Details
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