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ACQUISITIONS AND DISPOSITIONS - Dispositions (Narrative) (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 CAD ($) | Oct. 05, 2022 CAD ($) _community pipeline
Athabasca Indigenous Investments Limited Partnership |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Number of communities represented | _community |  | 23
Athabasca Regional Oil Sands System |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Number of pipelines to be sold | pipeline |  | 7
Disposal group, consideration |  | $ 1,100
Athabasca Regional Oil Sands System | Athabasca Regional Oil Sands System |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Ownership interest percentage held by noncontrolling owners |  | 11.60%
Noncontrolling interest (percent) |  | 88.40%
Dispositions | Athabasca Regional Oil Sands System |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Gain (loss) on disposal of interest | $ 0 |

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