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Divestitures (Details) shares in Millions, $ in Millions |  |  |  |  |  |  |  |  | 1 Months Ended | 2 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 13, 2022 CAD ($) gasStation | Jun. 08, 2022 CAD ($) | May 31, 2022 CAD ($) | Feb. 28, 2022 CAD ($) | Jan. 31, 2022 CAD ($) | Oct. 14, 2021 CAD ($) shares | May 01, 2021 CAD ($) | Dec. 02, 2020 CAD ($) shares | Sep. 30, 2021 CAD ($) | Aug. 31, 2021 CAD ($) | Sep. 30, 2021 CAD ($) | Dec. 31, 2022 CAD ($) | Dec. 31, 2021 CAD ($) | [1] | Dec. 31, 2020 CAD ($) | [1]
Disclosure of analysis of single amount of discontinued operations [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Before-tax gain (loss) on disposal |  |  |  |  |  |  |  |  |  |  |  | $ 269 | $ 229 | $ 81
Retail |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of analysis of single amount of discontinued operations [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Before-tax gain (loss) on disposal | $ (74) |  |  |  |  |  |  |  |  |  |  |  |  |
After-tax gain (loss) on disposal | $ (56) |  |  |  |  |  |  |  |  |  |  |  |  |
Number of stores sold | gasStation | 337 |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration for sale of assets held for sale | $ 404 |  |  |  |  |  |  |  |  |  |  |  |  |
White Rose Field |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of analysis of single amount of discontinued operations [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Before-tax gain (loss) on disposal |  |  |  |  |  |  |  |  | $ 62 |  |  |  |  |
After-tax gain (loss) on disposal |  |  |  |  |  |  |  |  | $ 47 |  |  |  |  |
Percentage of working interest acquired |  |  |  |  |  |  |  |  | 12.50% |  | 12.50% |  |  |
Payment to transfer working interest |  |  | $ 50 |  |  |  |  |  |  |  |  |  |  |
Wembley |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of analysis of single amount of discontinued operations [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from disposal of oil and gas assets |  |  |  | $ 221 |  |  |  |  |  |  |  |  |  |
Before-tax gain (loss) on disposal |  |  |  | 76 |  |  |  |  |  |  |  |  |  |
After-tax gain (loss) on disposal |  |  |  | $ 58 |  |  |  |  |  |  |  |  |  |
Tucker |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of analysis of single amount of discontinued operations [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from disposal of oil and gas assets |  |  |  |  | $ 730 |  |  |  |  |  |  |  |  |
Before-tax gain (loss) on disposal |  |  |  |  | 165 |  |  |  |  |  |  |  |  |
After-tax gain (loss) on disposal |  |  |  |  | $ 126 |  |  |  |  |  |  |  |  |
Headwater Exploration Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of analysis of single amount of discontinued operations [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from disposal of oil and gas assets |  | $ 110 |  |  |  |  |  |  |  |  |  |  |  |
Headwater Exploration Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of analysis of single amount of discontinued operations [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Before-tax gain (loss) on disposal |  |  |  |  |  | $ 116 |  |  |  |  |  |  |  |
After-tax gain (loss) on disposal |  |  |  |  |  | $ 99 |  |  |  |  |  |  |  |
Sale of common shares in equity method investment | shares |  |  |  |  |  | 50 |  |  |  |  |  |  |  |
Proceeds from sales of investment in equity-accounted affiliate |  |  |  |  |  | $ 228 |  |  |  |  |  |  |  |
Marten Hills, Alberta |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of analysis of single amount of discontinued operations [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from disposal of oil and gas assets |  |  |  |  |  |  | $ 102 |  |  |  |  |  |  |
Before-tax gain (loss) on disposal |  |  |  |  |  |  | 60 |  |  |  |  |  |  |
After-tax gain (loss) on disposal |  |  |  |  |  |  | $ 47 |  |  |  |  |  |  |
Marten Hills, Alberta | Marten Hills |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of analysis of single amount of discontinued operations [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from disposal of oil and gas assets |  |  |  |  |  |  |  | $ 33 |  |  |  |  |  |
Before-tax gain (loss) on disposal |  |  |  |  |  |  |  | 79 |  |  |  |  |  |
After-tax gain (loss) on disposal |  |  |  |  |  |  |  | 65 |  |  |  |  |  |
Consideration received for sale of operating assets |  |  |  |  |  |  |  | $ 138 |  |  |  |  |  |
Consideration received for sale of operating assets, common stock (in shares) | shares |  |  |  |  |  |  |  | 50 |  |  |  |  |  |
Consideration received for sale of operating assets, common stock |  |  |  |  |  |  |  | $ 97 |  |  |  |  |  |
Consideration received for sale of operating assets, purchase warrants (in shares) | shares |  |  |  |  |  |  |  | 15 |  |  |  |  |  |
Consideration received for sale of operating assets, purchase warrants |  |  |  |  |  |  |  | $ 8 |  |  |  |  |  |
East Clearwater and Kaybob |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of analysis of single amount of discontinued operations [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from disposal of oil and gas assets |  |  |  |  |  |  |  |  |  | $ 82 |  |  |  |
Before-tax gain (loss) on disposal |  |  |  |  |  |  |  |  |  |  | $ 17 |  |  |
After-tax gain (loss) on disposal |  |  |  |  |  |  |  |  |  |  | $ 13 |  |  |
[1] | See Note 3X for revisions to prior period results.

X
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X
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X
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- Definition Consideration Received for Sale of Non-current Assets, Warrants, Value + References No definition available. + Details
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X
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- Definition The cash inflow from disposal of oil and gas assets. [Refer: Oil and gas assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2022-03-24 -Paragraph 16 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2022-en-r&anchor=para_16&doctype=Standard -URIDate 2022-03-24 + Details
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